2012年5月29日 · Wrong. Air flow is important but air velocity is even more important. Larger vavles and runners slow down the velocity. Less power! Air velocity = throttle response and driveabilty. Until the air in the ports reaches super-sonic speeds, these AFR 165's are the most efficient heads on the market. Keep the rev's under 6500 and you will love them!

2002年6月11日 · Reluctantly I have decided to go with AFR 165 heads (58cc) for my LX build up. My original plan was to go with AFR 185's, Comp Cams XE282HR (232/240 duration at 0.050", 0.565/0.574 lift, 112 degrees separation) and a Trick Flow R-Series intake manifold.

2008年5月29日 · Some more AFR 165 results Stock short block from 98 explorer originally a GT40P engine AFR 165 58cc heads with smoothed and polished exhaust ports beehive springs, scorpion rockers, comp one-piece pushrods and lifters Cam Specs: Intake Exhaust Gross Valve Lift .532 .544 Duration .006 tappet lift 284 290 Duration .050 224 230 Lobe Lift .3330 .3400

2021年11月28日 · Afr doesnt offer a 165 enforcer, 185 only. 165 has a 1.900 intake valve, the 185 is 2.02, this is the reason they say not compatible, nothing more Fordstrokers.com Owner Reactions: tmoss

2008年5月20日 · yes an afr 165 can make good power with a 351. depending on your goals it may be enough for you or maybe it won't. 1982 Ford Fairmont Futura H/C/I, fuel injected and turbocharged 10.67@128 Save Share

2014年1月20日 · The best results ive seen was 165's with a systemax intake on a stock 302 and a custom ground cam from a pure street motor and it made 353/336. stock bottom end,stock intake tube/maf, AFR 165's,ported cobra intake,70mm TB, BBK longtubes, B cam 336hp/354tq

2006年1月5日 · I have both sets of AFR's A S-Trim 347 w/185's and a holley intake,and a high compression n/a 347 w/165's and a holley.Before the supercharged car got freshned up,the 165's were on it.On the dyno I gained 12hp w/the head swap.If you still dont belive me go to muscle mustangs& fast fords web site,they did an article on this very subject a few ...

2012年12月27日 · The springs they provide standard today are what AFR used to sell as their upgraded springs. Ed or Woody will hopefully shed more light on the spring set-up. 1989 GT - Vortech Fordstrokers 414W build in progress - Lentech AOD, Super Victor EFI, AFR205,

2003年5月22日 · It shows that the standard .550 AFR #8020 spring has specs of #120 seat (at 1.800)& #300 open and a rate of #345. Here is the weird part. In my comp cams catalog the 987 has the same #344 rate as the AFR. The #138 seat is listed at 1.750. If you take the 987's and put them at AFR's 1.800, the pressure goes down to AFR's #120 seat.

2013年1月20日 · I recently picked up a set of afr 165 heads for my 93 GT. The bottom end has 210,000 miles on it. I was going to just put the heads on until it blows but then i got a 351w short block with super low miles. Would the 165 heads work well on the 351. I will probably never rev passed 6k even at the...