Yeah at this point I don't know if this is a hybrid tech,engine managment or forced induction problem. But I assume it's probably all of the three.
Ive been trying to tune this car for about a month now and just spent from 5pm to about 3am on it and have gotten nowhere.
It's a 98 gsr stock internals engine ,converted to obd1 with a turbo setup consisting of.
a pfab log manifold a small sperco intercooler and some massive 5yo but never used ebay knock off of a t70 looking thing. The guy it was bought from was clueless said it was a 60 trim like that was a complete answer.
lets see what else dsm 450cc's a resistor box and walbro 255 pump. A nice looking turbosmart wategate.
the problem is that the car runs fine out off boost and just into boost up until about 7psi then it starts breaking up really bad and the wideband goes leanlike from missfires . So i'm still leaning towards an ignition problem.
with software ive tried adding fuel and taking fuel away massive amounts either way.
the same with timing as low as 14degrees and as high as 27degrees.
it makes no differance.
changing maps ive built new roms from the ground up a few times. And just tonignt I tried a rom from the last gsr I tuned with forgings and 15psi of boost it would about hold you back in your seat.
but in this car it has the same problems
known good parts ive swapped in
The ecu ,ignitor ,coil fuel pressure regulator ,differant 450's a differant fuel pump. We punched a hole through the inside of the fuel filter to make sure it wasn't clogged.
We checked the timing belt. It's good
plugs have been ngk 8's and 7's weve went from .030 down to .025 it makes no differance.
I'm at a complete loss with this car. I'm pretty much out of idea's
Here's a pic of the plugs