AFR still the best LSX head on the market?
02-17-2008, 07:21 PM
#61
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This question is just like the debate on headers. Buy one of the top namebrands and you will be happy. All of them will make you good power and you will not worry about getting a better set of heads. ETP, AFR, TFS will all make you big power long as your setup is done properly. Personally I went TFS and have been happy.
02-17-2008, 07:58 PM
#62
Buy the AFR 205's for your 347 ... small runners = low end grunt and better ET times while still making good power pretty far up on the top end. PM PatrickG. He has done a lot of testing on AFR's. He ended up swapping from 205's to 225's and went back to the 205 Mongoose heads.
Don't worry 'bout ole Jon. He's likes ridin' dick.
Don't worry 'bout ole Jon. He's likes ridin' dick.
02-18-2008, 08:31 AM
#64
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Buy the AFR 205's for your 347 ... small runners = low end grunt and better ET times while still making good power pretty far up on the top end. PM PatrickG. He has done a lot of testing on AFR's. He ended up swapping from 205's to 225's and went back to the 205 Mongoose heads.
Don't worry 'bout ole Jon. He's likes ridin' dick.
Don't worry 'bout ole Jon. He's likes ridin' dick.
02-18-2008, 09:42 AM
#65
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I would have to say a well ported set of ls6 heads. You will have just about as much money in them as a set of afrs or trickflow heads.
... 
02-18-2008, 10:34 PM
#67
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I got the AFR 205cc heads(thunder racing) and Comp Cams XR275HR Cam (222/224 .566/.568 112 LSA). I have long tube headers and slowmaster cat-back. AFR are amazing heads as I'm sure the others are too. What your are setting you car up for will almost tell you what heads to get. AFR is IMO the best street/strip heads out there. You may get more power out of some of the others heads but I dont think you will see this kinda torq or power even with mid-sized cams as with the others. I dont even have the 90/90 yet my headers are not that great and my cat-back sucks.
02-19-2008, 07:02 AM
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02-19-2008, 08:34 AM
#73
I got the AFR 205cc heads(thunder racing) and Comp Cams XR275HR Cam (222/224 .566/.568 112 LSA). I have long tube headers and slowmaster cat-back. AFR are amazing heads as I'm sure the others are too. What your are setting you car up for will almost tell you what heads to get. AFR is IMO the best street/strip heads out there. You may get more power out of some of the others heads but I dont think you will see this kinda torq or power even with mid-sized cams as with the others. I dont even have the 90/90 yet my headers are not that great and my cat-back sucks.
02-19-2008, 12:17 PM
#75
TR224
Comp 224/224 .563/.563 - 386rwhp
FM7 224/230 .578 .593 114 - 392rwhp
TR224 - 397rwhp
Comp 226/232 .588/.596 114 - 388rwhp ~ A4
224/224 .579/.581 112 - 399rwhp
and many more in the Cam Only Dyno Thread
We've already seen that the AFR heads are worth 35-40rwhp over stockers, so I don't understand why 436 with a mild cam and bolt-ons is so hard to swallow...
Lesson learned, sackriders/nut swingers come in all flavors...
02-19-2008, 04:24 PM
#77
I should add, that all the heads in this discussion are only as good as the execution and combination of parts used. The truth is, for every good example I was able to find above, there is sure to be at least twice as many poor results due to tune, low compression, poor exhaust, wrong centerline, mismatched parts, etc. The same applies with heads, especially where the compression, matched application and valve events are concerned.
I think that all the heads in the discussion represent some of the best available to the market right now. Each of them may work slighty better/worse than another depending upon your intended application. If one independant company were to conduct a series of engine dyno tests on a stock 346 with unmodified heads, then with a 224 cam and milling to 62cc's, then with a 240 cam with 59cc's, we would probably still not see a clear winner across the board.
I think that all the heads in the discussion represent some of the best available to the market right now. Each of them may work slighty better/worse than another depending upon your intended application. If one independant company were to conduct a series of engine dyno tests on a stock 346 with unmodified heads, then with a 224 cam and milling to 62cc's, then with a 240 cam with 59cc's, we would probably still not see a clear winner across the board.
02-19-2008, 08:08 PM
#79
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AFR, ETP, or Trickflow are all great heads and neither would be a bad choice. But the heads will only flow as well as the intake manifold in the end. The low lift and mid lift flow numbers are what matters the most on a street motor with a hydraulic cam. Just look at Patrick G's latest setup with AFR 205's.
http://guerragroup.com/2000TA.htm
Jason
http://guerragroup.com/2000TA.htm
Jason
