| Hey again, we chatted about this a few weeks back. I remember you saying your fuel pressure was 60 or 61psi at 15psi boost. I've been around some cars that have undergone a TT conversion, but kept the NA fuel pump. The problem that causes sounds a lot like your problem. The NA pump keeps up until 15psi boost, then falls on its butt back down to around 45psi. Does your fuel pressure steadily climb with boost, or does it spike and falk back any? You could pull your plugs and see that way if you are running really rich or lean. I don't know exactly what to look for, but I'm sure Ash would be willing to help if you emailed him the photo. Perhaps your TT fuel pump is weak/dying.. Has it ever been replaced? I cannot remember specifically now, but at 16.5psi, my fuel pressure was between 65-70psi. But I cannot imagine a 6-7psi difference in our fuel pressure would make your car feel sluggish. One suggestion might be to up the boost to 17 or 18psi (buy race fuel if your car detonates in this range) - if your pump is indeed the culprit, I imagine you will see the pump fall hard on its butt, and fall down into the 50psi range. So try this - if your pump can keep up and supply 63-64psi fuel pressure, then it may not be the problem. I'm half thinking out loud.. Hope I gave you an idea or insight. At any rate, I hope you get it figured out! Kez
 "it won't feel that fast when you first step on it. this will deceive you. then it will kick your ass." - PennStateZ 6/3/05 "I retrofitted my Z31 by dumping what was left of the R12 into the atmosphere" *Member name omitted for his protection - 10/17/04 |
