AFR 225 vs Trick Flow vs ET performance
My recent dyno... 446/416
'99 WS6 M6
MODS:
LQ4 6.0L 364c.i.
224/224 .581 114lsa cam
AFR 205's milled to 59cc
TSP Lid
BBK IM
BBK TB
BBK LT's
BBK ORY
Magnaflow CB
CMS Tune


For every high powered TFS or ETP headed car I will show you a similar one with AFR 205's or 225's.
Independent real world testing has never been done but there are enough real world independent results that prove you can make just as much power with the AFR's.
Look at the better chosen AFR combo's out there (and there are plenty of them) and you see killer numbers that represent the top of their respective class....meaning dont compare a 224 cammed AFR combo with a different brand that had a 238 stick in it.
And AFR 225's seem to own the forced induction world IMO....tons of BIG power forced induction cars running our 225's....just do some digging around (Forget about comparing "published" flow numbers from different brands and types of machines.....there not worth the bandwidth they take up....the AFR exhaust ports are strong, especially the 225 versions).
Now there is no question the ET and TFS products are certainly beautiful heads with nice CNC craftsmanship (similar to an AFR piece and I dont get a chance to say that alot) and all three represent the pinnacle of "cathedral style" Gen III engines, but IMO, the vehicles entire combination (all the other engine components and driveline) is vastly more important than either one of the heads in question. Meaning the legit real world difference between all three given a non biased independent test (optimized for each combination) would likely show small differences when comparing WOT numbers, BUT, the part throttle response and "tip in" power which is alot more difficult to quantify is an area the smaller cross section of the 205 head would carry a slight advantage.
I have more to add but for now Im biting my tongue....choose any of the heads in question and there is no doubt you will have a smile on your face when the rubber hits the road....choose the rest of your combination wisely and that smile will be even larger.

Tony
Last edited by Tony Mamo @ AFR; Apr 1, 2008 at 10:04 PM.
And here is a test of different heads.
http://www.gmhightechperformance.com...heads/tfs.html
Here is the flow chart of the trick flow 215s
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
And here is a flow chart on the ETP 215s
http://www.etheads.com/flowsheets/ET...1_GIII_215.htm
Again the proof is in the pudding!! Anything else you need?
I showed you mine now show me yours. LOL
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