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How much more can I go? on ecu tune

Car-specific questions and tuning advice for the Lancer Evolutions. EVO 8 and 9 mostly, but earlier models welcome.

How much more can I go? on ecu tune

Postby rogersmith » Thu Jan 17, 2008 4:20 pm

Seem to have it holding 21-20 psi to redline.
91 oct.
downpipe + high-flow cat + cat-back
2003 evo 8.

I'm wondering why it suddenly drops after 5k. The boost seems to be holding there. Maybe need to up timing. (note: I stop after 6k because my injector duty cycle starts to max out. Need to install my fuel pump)
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Postby honki24 » Tue Jan 22, 2008 8:32 am

That's great, once you have a smooth boost curve, go ahead and add timing to clear up that dip. I might also suggest running an AFR of around 11.5 or greater to bring your IDCs down. You shouldn't need new injectors for 21psi on the stock turbo, just lean out some. Keep an eye out on knock coount when adding timing and leaning out to keep your tune bulletrpoof.
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03 Evo 8
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