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Old 12-06-2012, 11:47 AM
JoeFromPA JoeFromPA is offline
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Location: West Chester, PA
 
Join Date: Jan 2007
Posts: 1,734
Mein Auto: 01 M5, 08 535xit
I see a dyno above doing 283whp on race gas. It could probably do even more on e85. I'm talking pump, which I guess I should've specified "without exotic fuel" but whatever. Terry's software tune bumped it up by 30whp on 93 pump gas.

Listen, I drive a car with a 2.5 liter that can JUST hit 300whp on the stock smallish turbo, and the n20/n26 is far more efficient than that car.

However, the turbo in the n20/n26 is a TD04-LR6. I can't find much on the wheel sizes, but this turbo has been around for a long time in it's core form. If you notice Terry isn't shifting the peak later into the powerband - that turbo is capping out at 5500 rpms or so. It is NOT a big turbo. You can find a flow chart on it's efficiency pretty easily.

I'm just challenging the idea that 300whp is going to be easy with bolt-ons on pump gas. I think the turbo and probably fueling requirements are going to cut into the idea of "DP, intercooler, tune" on pump gas.

I could be wrong - I'd love to be - just adding a dose of caution.
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01 m5 - 127k miles 11/2013....08 535xit - 94k miles
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