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Thanks guys,I will check MAP stability!,im confident the cam timing is correct,i went to great lengths last build to make sure that wasnt an issue!.
I think the bulk of my problems are in the lower rpm range,i tend to get black smoke if i idle for along time then do a WOT run,then if i striaght away go WOT again there is no smoke. The tuner mentioned he had to run it quite rich to get a good idle...there has to be something wrong with injector firing time and intake valve opening at idle!!?,it could also be the fact the cam is switching on/off all day long when under light loads and this may be causing rough mixtures,maybe we should raise the TP switch point to say 15-20% instead of 10% and make sure the injectors are firing when there is sufficient valve opening,if we fire them late enough this may also help avoid any unwanted backpressure deflecting the fuel. Having a very rich mixture at idle(high vac) may explain why the oil smells of fuel.
Hmmm thanks again for the input always good to get more thoughts on the table.
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