Afr 265 heads on 496. Jump to Latest 21 - 40 of 45 Posts.

Afr 265 heads on 496 Sep 10, 2012 · IMO the brodix head is a better head then the AFR 265 for the money. 5-1 compression with a pancake torque curve. Jul 12, 2011 · 496 BBC (AFR 265's, Straub Hyd Roller, Callies/SRP rotator, Eddy Air-Gap, AED 850) GM Block, AFR 290 Heads, Callies Crank and H beam rods Chris Straub HR Jul 28, 2010 · This engine is a 10. My cylinder head choices are currently RHS Pro Action heads or Edelbrock Victor Jr. 625 lift, 250 ish duration) in a 3600# vehicle. Save Share If you compared the AFR 265 oval to the 305 rect head, using the same I review an AFR 265 BBC head and flow it on my flowbench and share the numbers. 632 Eddy rpm air-gap UP to 6000 rpm the head is fine on a 496, over that I need to add duration to it. 305's will Apr 18, 2015 · AFR's full cnc 290 only flows 7 cfm more at 500 than the 50% chamber 265's and only 2 cfm more than the 100% chamber 265's. 11 12 Bolt Mar 9, 2010 · Heads are AFR 265's, and i'm not sure if that changes anything. The AFR265 and 305 are AFR's best bang for the buck. Mark's pump gas 496 with AFR 290's made almost 740 HP and 690 lbs/ft with a dual plane. Mar 10, 2009 · AFR 315 CC Heads milled to 115 (Thanks CSTRAUB) my 496 with the afr 315s did great. Nov 28, 2005 · How would a 265 head fair on a 10. Jump to Latest 21 - 40 of 60 Posts. 050 cam for a small street motor like 396 on pump gas with 9. If you want more of a COPO tribute motor, send me a PM. 050" Hyd Roller Cam10. Moroso Trick Springs,CE 3way ADJ shocks. Cam shaft I want to go with is a comp cams part # 11-450-8 specs of duration at . 300 valve upgrade that we do here, unported will support over 800HP if wanted. 496 BBC AFR 265cc CNC Chambers Oct 7, 2012 · The AFR 290 heads certainly look good on paper and even better on the dyno. but just for comparisons sake how would the 290's with a high 230-ish or so h/r cam ,dual plane etc. Either motor will be running a set of cnc chambered 265 AFR heads I have with around 9:1 compression ratio, either will be an aftermarket block. Molnar internal balanced rotating assembly. 4 compression, with a Mahle piston. plus some minor pocket porting) clay smith solid roller with isky lifters (he says they're worth every penny) and a forged Scat crank (he always recommends forged because the price difference is cheap insurance and Jan 6, 2012 · Im going to be installing some AFR 265 heads soon. 7:1 with a 114cc chamber. Just make sure the entire combination compliments itself. Dec 19, 2008 · this seems like a nice outcome for those heads on a 496. May 23, 2006 · 265 afr headed 496. 6 compression pistons. AFR 265cc Oval Port Magnum BBC Cylinder Heads. 385 IRC rods Modified Moroso 20401 oil pan M77 oil pump 10/40 Maxima conventional oil, Wix 51061 filter MSD 85551 Jul 12, 2013 · Vortecpro 496" Big Block Chevy VortecPro / AFR 265 Heads238@. Fig. 55-3. 4L/454 Chevy big block Gen VI AFR 265cc Oval Port Magnum BBC Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. 776 deck height, line honed, bushed lifter bores, . seriously consider the full CNC AFR 315 heads. Port heads? Oct 15, 2019 · Im building a 496 strip/street motor. Joined May 7, 2014 · My build: 289 2 bolt block, 9. 007") we ended up at 9. in. 0cc-11. 4. 621/. 675 lift, 234, 244 at . told him that was an option , also said we could score another set of irons or a less expensive head but 265's is what recommended if he was gonna replace the heads. 25 BBC crank (1 PC seal), 21cc racetec pistons, Bull HOW TO MAKE BBC POWER. 051" head gaskets (my deck clearance was from . not sure. 608-238-248 on a 110LCA Johnson lifters compression is 10. 050 hyd billet roller, modified Summit 6 quart pan, 6 quarts of Valvoline 10/30, Melling M 77 OIL PUMP. Yes, the ProMaxx heads are a copy, but so is just about every other head on the market. May 15, 2010 · The AFR 305's will get it done on a 496. 2. Those big intake valves tend to float. The 290 head only comes in 112 cc versions Mar 21, 2009 · Westech Performance 496 Chevy Big Block Build - A Monster Is Born Shopping Cart DESCRIPTION PN PRICE AFR Cylinder heads (complete) 2101 $2,485 ARP Head bolts 135-3703 $70 COMP Rockers 1. You should get 550 hp at 5500-6000 rpm. 569 237/241 at . Jan 7, 2023 · Engine is a 496 bbc, AFR 265 cc heads V2 (p/n 3610-1), Comp Cams hydraulic roller w/ . With peak rpm - if i would have to guess - around 5500-5700 rpm. 0, 57mm S200s, AWD with Syclone/Astro transfer case Jun 25, 2008 · C3 Tech/Performance - BBC Heads AFR vs Edelbrock - I'm considering various cylinder heads for a 496 BBC I'm building. 13, 121. My 69 has a 30 over L72 with a CE 512 block and 840 Dec 11, 2009 · I am surprised that AFR has not put some test mules to work from a third party to give real world results, like the Eliminator heads were put through. Mar 1, 2014 · The rectangular heads don't have a lot of pull below 3000 or so on a 427. My 4 bolt block is currently at the machine shop. 621 lc 110 Jul 10, 2017 · From what I can tell these heads could support upwards of high 600 HP to possibly 700, Thinking of maybe a 670 ish build. Im guessing the stroker will be better here, but Id like to hear y'alls thoughts Dec 1, 2016 · My builder has a 700hp pump gas 496 program he uses with off the shelf parts such as as cast 320cc heads (Dart, Brodix, AFR, etc. AFR tends to have good parts included. The AFR 265 heads sound like a great option - my only concern would be header fitment with the raised exhaust port. The current 496 has the usual 18cc domes and the 572/620 gen 6 hydraulic roller in it. 25-10. I have been told that AFR 305's fully ported are the best choice, but at $3400, they are out of the budget. Nov 18, 2016 · 63 Impala, 454ho short block, 265 afr heads, 60mm S300s 62 Biscayne LS3 turbo, M23. This budget friendly head is perfect for your 509 to 540 Cubic Inch operating below 6500 RPM. I only use a 243/243 duration cam on 489-505CID engines to make peak in the mid 6000 rpm range. If you do decide to use rectangular port heads stay small like the 305cc or 315cc runners. intake. 19's on the AFR's and they flow great numbers at low lifts. These heads are compatible with engines that operate up to 6200 RPM. Figuring on Aug 5, 2010 · This engine was an exact duplicate of my AFR headed 496 build except for two parts, the oil pan and the heads were 781 GM iron oval ports. Sep 26, 2017 · Hydraulic roller cam (. 249 stroke, M55 oil pump blueprinted, Moroso 20401 pan heavily modified, 238 @ 0. 73 gears, and NT555 305/45R18s, and Ridetech suspension. If you’re staying with the 4” stroke. 080 over. 30 valve is WAY too big for a 496 in the 6K rpm range. 7 roller rockers, ARP 7/16" studs w/ 2" installed height (p/n 235-7202, they came with the heads). It also serves as a classic example of not only how sometimes less really is more, but also Find AFR 265cc Oval Port Magnum BBC Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. Blue is intake, red is exhaust. so perfect in my eyes with your use case / drivetrain. 150 lift, due to a superior valveseat form. 280 PISTONS 030 OVER" I want to be able to run this on pump gas, with this rotating assembly the compression ratios are Cylinder Head Volume-compression ratio 106. I am at 10. It also serves as a classic example of not only how sometimes less really is more, but also Feb 14, 2017 · 496 kit (crank+rods+pistons), new modern cam (one of the harold/ultradyne grinds most likely) OR modern heads (probably AFR 265cc), new modern cam, pistons with less dome and smaller headers The car is a manual trans 70, NOT a daily driver but rather a street/strip fun toy. now i have those same afr 315s on a shafiroff 555. 660"/. 385 rods, Molnar forged 4. 598 solid FT in a 4300 lb vehicle? Mostly street but will make a trip or two to track. 8:1 Compression Nov 23, 2022 · 496 10. May 17, 2011 · Mike Lewis 496 . They are a dead wringer for this build. 7:1 Pro-Magnum 1320-16 $318 Intake pushrods (8. 99! good luck should haul ass! Jul 26, 2021 · This is an Erson cam I put in an 11 to 1 496 a few years ago. 1972 Nova 496 AFR315 Straub HR 258/260, MT 255x60x15 drag radials, 1050 cfm Mar 28, 2015 · 496 BBC AFR 265cc CNC Chambers the GM one is the same size as the opening on the 265-300 heads & can be used to match an intake rotating ass'y, AFR 265 CNC's 496 with AFR 265 heads and Straub roller. 1 2 3 With the nice little AFR heads I'm going to say 709 HP @ 6200 680 TQ @ 4400 Dec 19, 2013 · There are head porters that do phenominol things with 049 and similar Rat Head castings. Joined Jan 1, 2010 · 5,524 Posts #21 · Aug 29, 2006 · Which heads would you guys put on a 496, in a 3500# car. Milling head deck will affect flow numbers. 030 flat top pistons Holley 750 HP Edelbrock Performer RPM manifold AFR 265 heads 119 cc Jun 7, 2016 · Afr 265 heads, 100% cnc combustion chamber 112cc 496: Scat cast crank, 6. 11 12 Bolt combustion chambers in the 265 line. Blue66's car proves this with his pump gas 496 that runs 9. Have been considering AFR heads for a while but was not sure about header fit. 600-. Jump to Latest 21 - 30 of 30 Posts. If I were to build the 496, I would not be able to but a goos set of heads. 050, lift . Those heads were gene 10114156. 600 @ the valve, 109 lobe separation. Mar 8, 2021 · AFR 265 heads that I blueprintednothing more. This is really good comparative info for someone who's thinking about going with the new AFR ovals and can't decide which port volume to choose. 728@120. 385 I beam rods, Milodon 66 chevelle oil pan, M77 oil pump blue spring, ported RPM air gap intake, holley HP1000 carb, open 1 inch plastic spacer, 2 inch hooker headers, 3 inch magna flow mufflers Apr 20, 2015 · Hey guys , I have been learning how good afr's 265's are, ( I like em) . 88'' one-piece stainless valves, 1. 578" intake and . 2:1 comp-2800-3000 stall I was really liking this Howards cam 120205-12 AFR's 335cc BBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. Aug 6, 2022 · do the afr 265 bbc heads work well? how much power can afr heads make? can the small afr 265 (oval-port) bbc heads make more power than the big rec port heads? check out this test where i ran a set of peanut port heads, a set of rec-port heads and a set of ported oval-port (049) heads on the same 468 test motor. you pbly best with 265 afr head and a 235@. 1050 double pumper 4150 and single plane. Most of the newer designed dome profiles will clear. 5:1 Compression91 Pump Gas695 HP684 Torque\ Jan 30, 2020 · Upside of the AFR 290 is the . My combo is a 489 , 10. Find AFR 265cc Oval Port Magnum BBC Cylinder Heads 112 Combustion Chamber Volume (cc) and get Free Shipping on Orders Over $109 at Summit Racing! AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. I have the Edelbrock Performer Rpm R-port heads on my 496 engine. Jun 5, 2015 · Hi guys, I'm looking for " off the shelve hr cam" for a 496 afr 265 head max rpm about 6200 auto 3:73 gear street/strip car. 275 40R17 mt drag radials 11. A 496 could have a 16 degree split at . 5 compression, Mahle piston on a 6. It's being built as a hipo street engine. 36, 117. Dec 20, 2021 · I have the AFR 265 oval on my 496" 20' v drive daycruser and love them, combo is: 2) 600 double pump holleys on a holley street ram, isky hyd roller . A 496 should make better torque than that. 5 to solid roller street cam 260ish @ 050, high 600 low 700 lift. 0cc 10. I need some other thoughts on this as I'm unsure, thanks! Aug 30, 2024 · Duration split is not correct for AFR heads. I would get a Lunati camshaft kit like this one for the street. cv67 · Registered. 5 to 1 this combo makes great low end tq and pulls strong to 6k rpm Mar 8, 2016 · 496 AFR 265 Dual Plane Intake. Aug 12, 2018 · Anyway the 496 has a good solid 4 bolt bottom end with forged crank and scat rods, JE pistons etc but the heads are 310 china heads and it has a very mild Lunati 231/238 @ . The ProMaxx heads respond to the same things that any production head respond to; some attention to detail. But for having an afr 265 on 496", I would sure hope it would make 650hp regardless. 468 is in my C10 longbed daily, but I would like to get at-least 550 with my sniper system, 600 might be a stretch with 781 heads. Cam was a billet hyd roller 238/248/578/608/109 installed on a 105. When you take the time to build an engine and spend the money, get the best heads you can, and thats an AFR 265. Nov 9, 2007 · 496 BBC 10. "revs like a chainsaw" GM Block, AFR 290 Heads, Callies Crank and H beam rods Chris Straub HR Pro Systems HP1000 658Hp /630 Tq TKO 600 3. Then, last year I custom ordered a set of angle machined Brodix RR ovals from Mike Lewis than were made with 100cc chambers. Jan 30, 2010 · The release of the Air Flow Research 290 cc oval port head has left me very curious to say the least. What if I were to build a 468 with a nice set of heads, say AFR 265's. 11 12 Bolt. 385 rod. 31 12 Bolt Pypes 3" SGA14R36 Hooker 2455 road levelers 4240 lbs w/driver 38* Factory A/C Mar 9, 2016 · afr 265 headed 496 build Post by vortecpro » Wed Mar 09, 2016 1:18 am 4. To make a set of 049 castings flow the equivelent of a set of AFR 265 or 290 CNC heads, I suspect you will start getting into comparable costs. All depends on the camshaft you go with. With your 509 and a 229 cam youre gonna come near hp wise. Apr 8, 2024 · The question comes to how much will it cost to do that. But I need to know if there is any other option. I also have the AFR 305 heads with the CNC chambers. 30, 119. The quality is what I care about and am willing to put my name behind. Apr 5, 2017 · So my question is this. Are there any options for headers out there other than Lemons? I wish I had an extra $2100 for headers (Headers 1400, coating 400, Nippedenso starter 220) because I hear they are great. This combo was on a chassis dyno once and made 525rwhp. Oct 2, 2008 · Magnum 325cc BBC Cylinder Head AFR's Magnum heads are available with a variety of upgrades, ranging from intake port sizes starting at 305 cc all the way to 357 cc. It gets real expensive turning a hyd roller faster than that. 0008, Scat 4340 indexed, 4. It comes equipped with a 2. He has a nice '67 Chevelle and it runs 11. With some domed aftermarket pistons, it may be necessary to slightly clearance or modify the piston due to our more efficient heart shaped combustion chamber design. Feb 22, 2024 · Out of all the aftermarket heads to choose from for a street 489-496, the AFR 265 would be at the top of my list. Dec 11, 2009 · 10. 496 with the same AFR 265's, 10. 75/9 area. His 496 uses AFR 265s. Without the proper time, duration, the engine will stop making power at a given rpm range because the there is still residual gas left in the cylinder that did not get out. 64 Chevy II, L92 6. And like Neil, I passed the AFR heads to avoid hassles with the raised ports on the exhaust. 9K views 29 replies 13 participants last post by afenderman67_9751 Dec 25, 2024 Sep 17, 2010 · As title states, is the AFR 265 head too small for a pure 100% street grunt motor? My idea for this motor would be: AFR 265 496 ~10:1-10. 250 intake valves compaired to the 2. not to mention they are almost 3 to 400 cheaper then the AFR's and brodix offers all of there heads with the bowls blended free of charge. 05 107 split 850 Quickfuel,Air gap intake, th400,12 bolt with richmond 373 gears. 6/1 AFR 265 ovals 112cc And if you got the coin. I went with 290's just so I use them when I goto a 540 torque monster in the future. Not sure on piston options yet. engine 2 on 427/468 ci 265 heads would be better pac springs that come on hyd roller afr heads, about AFR Heads, 3600 BBC AFR 265 Oval Port Heads, As Cast, 109cc, Bare AFR BB Chevy, Aluminum Heads, Intake Runner 265cc, Combustion Chamber 109cc, 2. 310 x 4. Carb needed some jet. Jegs lift bars, Umi control arm braces. What are your thoughts? Oct 25, 2018 · 4. Maybe peak power will be around 5900-6200 rpm. 000 to +. Btw, we re-dynoed my buddy's 498" that you did the cam for last year, it made 706hp with a 1000HP, 726hp with a dominator. 12 mph with a 2 second 60 Ft Learning to hook! Find CHEVROLET 7. Apr 21, 2015 · This test of the AFR 265 oval-port heads is a perfect example of application-specific cylinder heads. are you ready to invest in a suited valvetrain to make the heavy BBC valvetrain reliably live up there? The 265 CNC head flows 335 CFM at . this version features forged Molnar 6. Crazy times AFR strongly recommends material be removed from the piston and not the cylinder head. 596" exhaust lift, Morel hydraulic roller lifters, Comp Cams 1620-16 steel 1. 454 +. 73 12 Bolt. 880 Exhaust Valve, CNC bowl blend, Partially CNC Chamber w/ Hydraulic Roller Springs . Cam is a roller 242/640 intake, 246/650 exh. Dec 23, 2023 · I am building a street only 70 Chevelle that will have a TKX, 3. I have the AFR 265 heads with 112cc chambers and plan on SRP pistons and shooting between 10. 632/. 2:1 , afr 265 , straub 243,610,109lsa , rpm air gap , prosystems 1000 Do not match your intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads. Feb 22, 2016 · The Rectangular port aluminum heads have 118cc chambers making it necessary to use -20cc dome pistons. Dec 7, 2024 · 496 build, which heads AFR 265-290-300CC? Jump to Latest 1. 660", 108lsa, RPM Airgap, Pro Systems 1000HP. maybe even 8000. AFR heads are a great head but to say that their 265 head will blow Sq. 050" hydraulic roller. 5 mudders Well-built 700r4 4. be? Would that be a waste of a full cnc head for a street only 496 car?. If a solid roller it isn't too big but the duration spilt will blow the power right out the pipes. If it is a hyd roller it is way to big. The Summit iron head had a similar 320 cc intake port and flowed a little better than the GM head but the real difference was in the exhaust port the GM head flowed Feb 27, 2019 · Some bbc alu heads only have six intake bolts same with some intakes. AFR 265 heads with 2. Hell I am even considering the AFR 265's, they outflow the Brodix RR. 250, 10. Our small port, high velocity 265cc cylinder heads are a cost effective choice compared to re-worked factory big block chevy cylinder heads. Mark at VortechPro seems to have a knack of drawing phenominol flow numbers. 310 X 4. 725" Max lift Jun 16, 2017 · The latest power plant for my 1972 Nova. I know they have raised exhaust ports at . 5:1 496 with 252°-260° @. 14. 470-inch) 7757-8 $136 Camshaft 11-825-9 $328 Lifters 888-16 $501 Mar 25, 2015 · Had 290 cylinder heads 2. Would work with Dart or Eddy heads. Thanks for the help! Sam I got my 496 on the test stand last night and installed the Hedmans(65002) Dec 2, 2013 · This is your answer right here. Flotek is a little cheaper, that is from finishing and/or lower quality parts, but they will serve the purpose they were built for. I then decided to let Mike perform some of his porting magic to the heads. C. Jan 1, 2020 · The AFR 265 heads will feed that beast just fine up to 6000 rpm. I built my 496 with flat tops because I already had a very nice set of -702 closed chamber GM heads from Dr. S UP to 6000 rpm the head is fine on a 496, over that I need to add duration to it. For a street setup you may want to look at the AFR 290, Brodix 270 and Trick Flow 280 ovals -all good heads. Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. I think an AFR 290 on a 496 would be just fine. Don't know much about the RHS heads, but like a few have already suggested, why not run whatchya got and see how it goes? Easy enough to swap out the heads later if not happy with the results. What fuel and how much timing? How well did the intake ports match up to the heads? Apr 9, 2020 · '67 Chevelle Malibu, Catalina Blue, 540 inch Rat, Air Flow Reasearch 290 CNC Heads heads, Custom Hyd Roller, . 650 lift depending on the heads. Jul 22, 2002 · Those 265's must really be a choke point on a 496. 385 Scat I beam rods unfinished, 2. AFR strongly recommends material be removed from the piston and not the cylinder head. Oct 7, 2009 · The combo worked well. the brodix heads also have bigger 2. Im buying a rotating assembly from skip white "BBC CHEVY 496 ASSEMBLY SCAT & WISECO +20cc DOME 4. Jun 4, 2023 · A 2. The RHS heads are 320 CC heads but look suspiciously like a ProMaxx head. 1 2 3. Compression for the AFR head test was 10. Mar 9, 2016 · afr 265 headed 496 build Post by vortecpro » Wed Mar 09, 2016 1:18 am 4. Recommended for street, strip, or towing Dec 20, 2011 · AFR 265, one very trick head, sure you have to deal with the exhaust, but its so much better than the rest, not only in performance but quality as well. Mike Lewis would be the place to buy either head. 7 compression ratio. PEANUT PORT VS ALUMINUM HEADS. 5 cr These heads are built to improve your ride’s airflow through the use of partial CNC-ported intake, exhaust, and combustion chambers. 250 Mahle 10. 325/. 496, 10. Mar 13, 2016 · -AFR 265 heads 3610-1-Howards max effort 91161 lifters-will measure for push rod length-Comp Cams rockers 1620-16 -Comp Cams timing set 2110-Nylon cam button 205-Summit timing cover G6301W-Eddy RPM Airgap 7561-M77HV pump/matching shaft and screen-Stock pan-10. Aug 25, 2022 · I got the 496 with 049 iron heads (sometimes he uses 781 i think) and the 238 cam --> 670hp @6000rpm. J's that were 97cc. 578 . solid Sep 8, 2021 · I am picking up my engine from the machine shop this weekend and I went with afr 265 heads . 50's and it has 195 AFR heads on his well built 383 SBC. NOTE: 1" longer head bolts needed on four bottom exhaust bolt holes. The current pistons that are in the block are Part # 1448HC that are . 50 hyd roller, 109/105 . Jan 28, 2023 · The AFR is a good full point too lean. Premium hardware such as 2. 0cc Oct 13, 2017 · C3 Tech/Performance - 496 AFR 265 Dyno Test - 496 4. 4 on the nose. mrpaticular · Registered. Would the 265 choke the top end too much? Would a combo like this spin to say 5800-6000rpm? Nov 11, 2010 · Those 265's must really be a choke point on a 496. You can't really go wrong with either head 67 build LT4/T56 @GoolsbyCustoms Feb 9, 2015 · Good numbers! Especially for a relatively small cam. Dec 22, 2005 · Not looking for much more than 500hp, but Id like 600ft lbs as soon as possible. Even though the AFR head has an intake port only 4 percent larger it flowed up to 40 percent more air. Jun 12, 2005 · AFR 265 vs AFR 290. That is an awesome engine combo several guys around here run similar combos all with the AFR heads but different inches, a 496, 521, 540, and a 555. Feb 22, 2020 · A while back I machined and built this 496: 4. 238/248/ 578/608/110 Hyd roller on a billet, Modified AFR 265 heads, modified Performer air gap intake, 1 inch Jul 14, 2021 · A fellow racer across from me and I were talking as he was all impressed with the heads I ran. 56 gears My current pistons are 60 over flat tops so compression with stock rods is pretty garbage. 347". Oil pan holds 6 quarts of 10-30 Valvoline, carb will be a 1000 CFM 4150 with a 1 inch open spacer. 083 wall pushrod Sep 14, 2021 · I am picking up my engine from the machine shop this weekend and I went with afr 265 heads . Probably another Performer RPM Air-Gap w/ Holley Terminator X TBI Peak HP RPM up close to 6,000 but preferably that'd be about it. Specifications: . i also ran a set of afr 265 bbc Jun 26, 2009 · Engine is a 496 bbc, AFR 265 cc heads V2 (p/n 3610-1), Comp Cams hydraulic roller w/ . Im guessing the stroker will be better here, but Id like to hear y'alls thoughts Dec 2, 2016 · The porting only goes about an inch in and is pretty exaggerated , sloped a lot , would need more porting work I would think to make it work , seems like that would hurt flow. Not too bad for small Dart heads with some work on them. The AFR heads received a little work, CCs were set at 112, spring pressure was set at 170/400. all the same intake manifolds and all run deep 10's and the occasional 9. Oct 26, 2014 · I'm looking at possibly going to an aluminum head in the spring, and the AFR 265 is looking like a good choice, given the cam I currently have in the car. The biggest-percentage increases were at 0. 5-1 496/AFR 305's/Voodoo 60234 Solid Roller/TH400 4000 Stall/4. It’ll make gobs of torque. Feb 26, 2019 · Either the AFR305 or the ProMaxx 317's will reach your goal. The engine build will be based off a production block, sporting a Scat rotating assembly with a 10. 5 compression 248/258/608/630/110 HYD roller Scat 4340 crank Scat 6. AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. I have a Weiand Stealth on the 496 right now, but was wondering if a Performer RPM Air Gap would be better suited for the heads. 4:1 CR. Our combustion chamber shapes are very critical to flow and altering the cylinder head can adversely affect flow and power production. 5 in the quarter and it flat runs out of steam in the Jan 25, 2010 · 10. These heads will support over 700HP out of the box. Do not match your intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads. Nov 13, 2013 · 71 Chevelle 496 Stroker Hyd Roller 675HP, TH400 3500 Stall, 3. the Chinese un-ported AFR SBC head against the other Chinese competition, and the AFR came out on top Sep 1, 2014 · ATK 496 Stroker,10. Actually I would be at 10. Jan 5, 2005 · Hi, I'll be heading to the dyno in the next week or so with my 498. I’ve been waiting for my Edelbrock Pro Flo since December. I would have to stay with the iron heads that came with the engine. I also worry about the Promaxx being a bit too big and I think more and more about a 265 AFR or a RaceRite 270 or something with some smaller ports, oval instead of rec. 580-inch) 7906-8 $88 Exhaust pushrods (9. Did it make best power at that AFR? I would expect more torque also. Of course, it all costs. AFR heads would bump compression to 8. I’ve personally seen those afr 265s make 600hp on the dyno with a mush roller cam and 10. Afr 290’s if you go the 496 route. 69 Chevelle SS 10. 8, the iron headed engine sported 10. 578. operating at or below 6,200 rpm—providing tons of bottom-end torque, tremendous throttle response, and great all-around power. 4cr, 294cc RR heads, Ultadyne solid roller, 256°/264°, . I have a set of Promaxx 317 heads on my 496, they aren't fancy but they are better than a stock steel head. Jul 19, 2014 · These brodix heads need split as I have said for a long time. Its a 4100# car with th400 and 3. Edelbrock and afr are ”roval”. s. I still don't think you can go wrong . May 13, 2010 · AFR 290 /496 Hyd Roller Dyno test I'm running 265's on a street 496 with a slightly larger Cstraub HR w/morel solid lifters, port matched Vic jr w/ hopefully a Jun 26, 2022 · to be frank, i think the rpm you need to make use of the difference between an afr head with CSA 265 versus 335 CSA with "only" 454 cui is well beyond 7000 rpm. With either setup, I still plan on running a straub cam. 5 and 11 to 1 CR. 19''/1. 08 gears, 28" tires, tight PTC converter, idles and drives great. operating at or below 6,200 rpm—providing tons of bottom-end torque, tremendous throttle response, and great all-around power Dec 21, 2024 · They did a test on a stock 781 ( square port open chamber - GMs finest in 1971) head and a Summit head out of the box it made 50 more hp and 30 more tq than the 781 on a 600 hp 496. 050 hyd roll AFR Heads, 3610 BBC AFR 265cc Oval Port Heads, 109cc, Hydraulic Roller Springs AFR, BB Chevy, Aluminum Heads, Intake Runner 265cc, Combustion Chamber 109cc, 2. 190 Intake 1. I currently have a set of Edelbrock Performer RPM Rect port heads on the shelf I am considering using. so enough for 670hp. 060 over 289 casting block, 10. 375 raised exhaust port compared to many other heads. I was gonna go with the brodix but after talking to a few engine builders they seemed to like the quality of afr better. He will be more than happy to help you on your decision. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend; this torque monster is capable of flowing 354 CFM at 0. DO CHEAP ALUMINUM BBC HEADS WORK? HOW MUCH POWER DO SPEEDMASTER BBC HEADS MAKE? CAN THE AFR 265 HEADS M Jan 2, 2010 · AFR’s smallest oval port head has a 265 cc intake port volume and flows up to 350 cfm – a whopping 30 percent more airflow through basically the same size port. 1983 Chevy K10 35 x 14. I was worried I would be fighting overheating issues, but mine runs around 180-190 on a mid 80 degree day with a 160 thermostat from autozone, clutch fan from autozone, 3 core radiator from advance, and correct fan shroud with fan darn near all the way into the shroud. '69 Coupe Sep 28, 2010 · The new AFR 290 CNC ported head was tested on the 496 today. Jul 18, 2012 · The airflow data suggested that the stock iron heads would support over 650 hp, but on this 496, the heads managed to produce peak numbers of 630 hp at 6,600 rpm and 577 lb-ft of torque at 5,300 rpm. Ten years ago my 427SBC made 640HP and 565 torque with a set of AFR210 head that I purchased in 2000. The cam is a hyd roller with around a duration of 240s @ . The upgrades are almost too numerous to list, so we'll take a look at the as-cast, CNC bowl-blended, aluminum Magnum 325cc intake port head. 578 Piston head volume is supposedly 6cc Gasket thickness can be Aug 12, 2009 · I too have a 496 and have AFR 290's on order thru Mike Lewis (Wolfplace). 600"/240ish hyd roller with Morel street series lifters MSD HEI locked out @ 37* We played with timingdid not like 38, was happy at 36-1/2 - 37. 190 intake and 1. 4:1 Brodix BB-O heads, and RPM Perf. Mar 17, 2013 · AFR 265 cnc chambers Hyd roller 240/244 at . 7-10. " Dec 6, 2010 · The AFR 265's outflow, on paper the Brodix 270s but I ended up with the Brodix RR ovals. 385 rods, flat tops, 0 deck to minimize quench, very close to 9. 250" stroker kit from Mike Lewis at Team Chevelle (Lewis Racing Engines). It is the customers responsibility to verify proper piston to head clearance. With AFR's trademark 3/4'' deck, reinforced rocker stud bosses, and thick rugged castings, you can own the strongest and most efficient heads on the market today. 5:1 compression 230ish HYD RLR TH400 3. After grinding the tops of the bores to help unshroud the valves, and adding . 2:1 , afr 265 , straub 243,610,109lsa , rpm air gap , prosystems 1000 Nov 11, 2013 · Decide what max rpm you want to spin this motor, then CR and then heads then cam last IMO . 64 mcsa according to the website. Your cam was a 260 ish HYD Nov 5, 2021 · From AFR's website on BBC heads: AFR Big Block Chevy. 880 exhaust valve and features AFR’s trademark ¾ thick head deck for improved reliability. Same thing on my 460. it dynoed 819hp. Morel lifters. 650" lift. 07 Intake valves had a solid lifter FT cam (i suspect an LS6 copy) Looking at afr 265 CNC angle milled to 97cc chamber (block is already machine notched for bigger valves) May have to flycut pistons. Port heads away is a big laugher, then what does AFR make Sq. 5 compression, Mahle power pack pistons, worked AFR 265 heads, Performer RPM air gap intake, 1000 cfm Holley carb, 248 @ . The main point of these tests is to show how well the AFR 265 heads work (red curves). 550'' double springs, 10-degree locks and retainers, and high quality studs and guideplates all come as standard Vortecpro AFR 265 headed 496, 4. 250, modified AFR 265 heads, Performer RPM air gap intake, 1000 CFM AED carb, 1 inch open spacer, 245 @ . Does this tell us that the full cnc 290's are not worth the money in street applications? Sep 4, 2009 · This head is completely optimized with 80% CNC ported intake and bowl blended exhaust. Jul 12, 2011 · 496 Gen V BBC AFR 265cc Ovals CNC chambers Eddy RPM AirGap w/ 1" spacer 850 AED HO carb (80 primaries / 88 secondaries) AFR 265 heads, RPM air gap intake. Jan 25, 2023 · Afr 265’s. Do you currently have headers on your car? If so how much clearance do you have? You can use AFR 265's, Brodix RR's or AFR 290's. 050" if the rpm range is high enough. The A356 aluminum castings are matched with other high-quality components to ensure a lightweight construction that handles heat with ease. 4(ish) compression. My opinion That combo would have been the same or better with the 265's w/CNC chamber option given the intake was box stock & a huge bottleneck to the thing & the cam was somewhat of a compromise for driveability because this was for a street car. 0 CR and Feb 3, 2018 · I just got done with a 496-- started with bare Brodix RaceRite heads, Brodix valves and matched everything with 10* locks and tool steel retainers. 880 Exhaust Valve, As Cast with out Parts (Bare), CNC Bowl Blended Mar 4, 2016 · That'd be about half way to a set of AFR 265'sso just as well save up or invest in something that'll get me where i want to be. 80s. Would it support 6000-6500 rpm? Would I be better off with the 305? I really like the looks of the 265 head as far as numbers go. 024 below deck, trying to get quench in under 50 Hoping for around 9. . I bought my 4. 842, Mahle 15 cc piston, 6. Mar 6, 2016 · In the process of building a 496 with AFR 265 heads and a Performer RPM intake, comes in around 10. You need all you can get lugging that behemoth around. IMO you'd want a cam thats more in the 240 duration with . These RR heads really respond well to porting (see 1st attachment). Lol Afr 265 head will work on a 496 but the head is a little on the small side to feed it above 6500 rpm. 8 compression 496 with a 248 @ . The ProMaxx head with a 2. 250 Worked AFR 265 head Performer RPM air gap intake 1000 CFM AED 4150 carb 1 inch open spacer Mahle piston 10. Finally we will have the chance to test these heads on a pump gas 496. Its going in Aug 18, 2019 · So now I am looking for piston recommendations for use with AFR 265 heads. 050, Lemons Headers, Holley Multiport Fuel Injection, TCI 6X 6Speed Automatic, 12 bolt Posi Eaton TruTrac, 3:31 Richmond Gears, front and rear power disc brakes, Global West Suspension, etc. Brodix race rites have eight bolts same with edelbrock RPM/chevrolet performance not sure if afr 265 has but think they do. 2 compression, AFR 290 Heads cam 617/. 10. Mar 4, 2012 · Exactly. Aug 12, 2006 · 496 BBC (AFR 265's, Straub Hyd Roller, Callies/SRP rotator, Eddy Air-Gap, AED 850) GM Block, AFR 290 Heads, Callies Crank and H beam rods Chris Straub HR DO WE REALLY NEED REC-PORT HEADS TO MAKE BBC POWER? CHECK OUT THIS TEST WHERE WE COMMPARED A SET OF FACTORY, IRON, REC-PORT (088) HEADS TO A SET OF AFR 265, Jul 28, 2009 · How would a 265 head fair on a 10. 578 lift, billet core, Morel lifter, 3/8 . 3/8 . 083 wall moly pushrods Jan 1, 2010 · 496 build, which heads AFR 265-290-300CC? Jump to Latest 21 - 30 of 30 Posts. Mar 19, 2014 · Looking for feedback on current 496 build: Car is 68 RS/SS Camaro 3:73 M22, street car 1973 block 454 2 bolt with studs bored 60 over and planed Scat cast steel crank , procomp H beam rods Diamond -21 dome pistons Short block is internally balanced and assembled Parts ordered and awaiting shipment afr 290 heads with studs lunati billet voodoo Apr 21, 2015 · This test of the AFR 265 oval-port heads is a perfect example of application-specific cylinder heads. 73 rear gear. Dec 5, 2020 · The foundry is a modern, high tech foundry that casts all sorts of different parts. For a street engine I wouldn't go bigger than a 315-320 size head. 1 2. Jul 2, 2018 · Ive run the 265's on a couple of different 454's and 2 different 496's including the one I have now. 050 solid roller, AFR heads, ported air gap intake, 1000 HP carb with a 1 inch spacer, 2 inch headers, horrible 3 Jun 28, 2018 · I have the exact same Howards cam in my 454 with AFR 265 heads but 111 instead of 108. 050 . They come standard with solid or hydraulic roller valve springs, 7/16 studs with guide plates included. Dec 27, 2022 · Not looking for much more than 500hp, but Id like 600ft lbs as soon as possible. Heads and cam arent well matched at all and the best Ive been able to run with the combo is 11. This would make a very impressive street cylinder head on a 396-468 cid engine. 600 lift. 5 to 1 Hyd roller: (Gen VI) Erson E120810- 230/238 . 25 valves being installed. Brodix race rite may be a good alternative here. Heads are designed for 3/8" pushrods. 050 is 232 - 232 Valve lift is . 027 - head gasket Piston is -. 76 comp, comp 248/253 110, 106 solid roller, scorpion rocker arms, Scat 4340 crank, 6. Port matched Air Gap and AED HO 950 carb Sharp/ AFR rockers and Smith Brother's pushrods Mild . Any body got any real world situations to share? thanks. Jump to Latest 21 - 40 of 45 Posts. wmwddo yetjn tqwtn xgjeu tlhoa gaedu aunh udkjdjm sqjx ivart