high on gas fumes
I've been chasing my tail on a WOT issue where the car will just fall on it's face and won't shift into the next gear. It's mainly on the WOT 1-2 shift, but it sometimes does it when WOT downshifting as well. I suspect it may be weak valve springs in some reading here about the issue. As shown in the datalogs, the boost will drop when it does this...even with the gas pedal still to the floor! Do you think the valve springs are so weak that they aren't able to close under so much boost(30ish)? FWIW, it's got a 6776 Precision turbo, headers(Poston maybe), 3" downpipe, and ported stock heads as well as the other usual mods. Would it be worth a shot to turn the boost down to 25 or 20 and make a WOT pull to see if this confirms the problem being weak springs? Also, does this turbo really need 30psi to make power on these motors? What boost level would you suggest as a starting point? Thanks!