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Hi all I recently put an aftermarket turbo on my 96 Gq 4.2 EFI its dual fuel (Petrol,Gas) and upon getting it dyno tuned it couldn't handle anymore than 4 pound boost which is pretty low it also pings from about 3000rpm on fuel and slightly on gas! so I was wondering if anyone else has turbo'd this motor before and if so have you managed more boost than this and did it ping?
cheers Mick
You may need to take some timing out of it, or try an octane booster.
Ideally you want to lower the compression
yeh mate I've try'd both octane booster helps but not completely and timing is set too advanced 8 degress I've tried both retarding it and advancing it either way and it either gets worse or dosent perform right.
Standard ecu? Standard injectors?
yeh mate both are standard. Have thought that but injectors and ecu should be sufficient enough for 4 pound boost surely!
It probably should but you want to run 2 fuels so it will always be hard to find the sweet spot.Quote:
Originally Posted by Mick Patroln
did you just bolt turbo on and do nothing else. or have you had petrol pressure upped and gas converter needs doing to.
Do you have an intercooler? Do you have a boost referenced fuel pressure regulator?
Your detonation could be caused by intake air temps too high and/or insufficient fuel under boost.
I had a new gas convertor fitted which is adjustable for tuning other than that mate just dyno tuned once turbo kit was fitted.
hi John its not intercooled as of yet in the process of doing that. and I havnt touched anything fuel pressure wise! I have been thinking its simply tuning or fuel and air mixtures but i'm unsure on how or wat to do.