Quote:
Originally Posted by Goingnowherefast
Coming from an AP2 S2000 into an E85 BRZ this thread really interests me. First thing, the S2000's makes massive gains under the curve when lowering the VTEC engagement speed. Additionally, most people agree that you can set an AP2 to an 8,500 rpm redline safely, with no noticeable long-term degradation. Those two items alone make the difference between a stock AP2 and a tuned one as much as a change what E85 is to the GT86 platform. It'll be a whole new car.
To add to this, I believe my 2005 S2000 (intake, single exhaust, no tune, test pipe on 93 octane) would put a bus length on my BRZ (Tomei UEL, single exhaust, stage 2+, full E85) no problem.
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I don't know about the "most people agree" part. Both math and used oil data over time show that 8500 will significantly increase cylinder sidewall wear. I couldn't get wear to OE levels until I was back down to 8300.
Mathematically, ~8900 F20C ~~8242 F22C
While AUC increases with a VTEC drop, swept area (mostly) does not, and for redline pulls, zero gains are realized on a F20C, and only marginal gains on the 1-2 and 2-3 shifts on a F22C.
While your AP2 may feel more exciting, with equally skilled drivers and a good tune, your BRZ would actually be roughly even with the AP2. You could even just measure acceleration with Draggy, and find yourself surprised at the BRZ's acceleration. The BRZ squats less and has a longer wheel base, resulting in a lesser feeling of "pull".