isijappanisi

hi, and thank you so much for the replies. the GTSlink doesn't use afm, it's replaced with a 3bar map sensor. so that can't be the problem either.. i might get my hands on the dyno graf, try to get it scanned and posted here. and the turbo is a Garrett GT3076R with a/r .82, ext. wastegate.

as mentioned above in the mod list, i'm running GTSlink ecu. and the rev limiter set to 7500rpm. even tried to set at 8000rpm, but the engine still wouldn't rev over 6800rpm. can't figure out what's causing this. might be a faulty GTSlink.. but the again, if the ecu was going on rev limiter, it doesn't feel like a rev limiter, the rpm just goes slowly down and up.. not like a rev limiter..

Hi When i was at the dyno pack a couple of days ago, we encountered (is that how i should write it..? -norwegian member) a problem with the engine. The engine mods are: -new exhaust manifold with ext. wastegate -tial 38mm wastegate -Garret GT3076R A/R 82 -Greddy 1.5mm headgasket -HKS timing belt -FMIC -GTSlink ecu -3" exhaust incl. elbow -Nismo 555cc injectors -walbro 250 fuel pump This is a gen. 1 engine (1994) The engine works fine at lower revs (got 1bar of boost at 3000rpm), but when we hit about 6700rpm the engine just looses all power. and the highest rpm we got was 6800rpm. We checked the spark plugs, coils, a/f, boost and ignition timing. The only thing we could see was the a/f going richer from about 5000rpm, and when we got to 6700rpm it goes way to rich. tried to lean it out, change the ignition timing without any luck. The rpm limit was set to 7500rpm, but the engine rpm was neve near that. when driving, the engine cut feels like the car suddenly braking, there is no shooting from the exhaust or misfiring.. the engine power just disappears.. The engine has only been driven 70000km since new from nissan, and was pretty much standard before i started tuning it. So i'm wondering if anyone has had the same problem, or if you got an idea of what the problem might be? Hopefully i can get this sorted out. Thanks Stian