4gbanger
1,500 RPM
how much output can we produce if we upgrade evo parts to our trek can produce? maybe like camshaft, turbo, injector and new map... any ideas?
I don't think it'll make any difference. Stock springs is adequate for stock cams. Increasing the spring rate won't benefit more cos there's no sticky valve situation.hmm i see.. if we uses performance valve spring even with stock cam is it going to make it better?