With my old setup (GT1756 / [email protected] bar / 2.25 bar turbo pressure) I was driving for almost a year. Here is my 4th gear run:it may cause that. But I'm looking at 140mm^3 IQ. I think its too much? Maybe I'm wrong. But do you want to lower it also ? like to 110mm^3 or 120?
But with GTB2060 we started from 115IQ, then 120IQ and so on. There was improvement after every version until 140IQ. On low gears it pulls very very good, but high speed run seems to remain same.
My current tune version has a 140IQ but without any visible smoke. Low end torque is brilliant. But that's it.
I can lower fuel quantity, but I will lose low end torque. Fix me if I'am wrong.
I have all logs, but they look almost identical to me. Can you explain to me where to watch exactly?You need to compare it with full logs from 1500 to 4500rpm.
Backpressure can kill so much power.
My car with only 1,7 bar and 90mm3 drive 80 to 160 in 9-10sec on speedo.
I test it with 2,0 Bar and 95mm3 and it was not faster, because of my restricted exhaust.
Your car is almost 400kg lighter if I'am not wrong. Hard to compare these numbers.
In my case I think exhaust is not a case. Maybe turbo manifold is too restrictive. Or butterfly valve with stock intercooler pipe (52mm diameter)...
Anyway, thanks guys for help. I'am starting to lose hope to reach this build main target :-/