Jacob,
Sounds like a very well thought out build and a very good dyno set up by including both AFR & Boost curves! Lots of good info.
Looks like displacment, compression, cam timing, headers, and twin plugs all targeted to help low end and get it into boost quickly.
All these should add up to a pretty responsive build targeted for low to mid range power.
From the dyno plots shown I think I see the following:
1) You might be approaching the limit on fuel delivery.
2) The turbo is reaching its peak efficency at about 4200rpm / 250whp/300chp.
3) Your turbo might be reaching its gross delivery potental (.7 bar @ peak ; .55 bar at 5500rpm).
4) You are reaching full boost (.7 bar) just before 3500rpm which seems late given your build and turbo choice.
5) The test was stoped before the motor hit its peak HP potental. It has a great flat TQ curve that was still holding even though boost was falling off and the test was stoped early.
6) This motor should have about 450whp potental at 1. bar with the right turbo, fuel delivery, and tuning. [((350/ 1.55) * 2)= 450].
A GT 35 Turbo might be a good fit here. It might better hold boost through the upper rpm and do so in a more efficent way that helps keep the charge cooler.
I could be wrong so all I am saying is just watch your boost curve. If you can not hold boost through 6000rpm it is small and could be overly heating the air.
With its ball bearing construction and more efficent turbine it might even boost sooner and help your low end response.
I am not an expert, I just love this stuff so take this for what it is worth.
Quote:
Originally Posted by jwasbury
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