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hi
with my friend gmc sierra 15 ... supercharger and cam
and tuned by shop ...
in the last time .. there problem in the car and he lost about 100+hp in the dyno
.. when we check i found timing in idle -15 / -16 ! + also all injector not work properly
i ask some guys and he say ( you must re-calculator torque model )
what you think ! and how i can re-calculator torque model
So one pull to the next and you just lost 100hp and it went to idling funky? Am I understanding this correctly? Really sounds like you blew a vacuum plug off of the blower somewhere and now you have a major vacuum leak - that's if it just started one pull to the next...
If it's been doing this from the install time, then yes - it's a DI engine correct? - So needs a complete retune - more so due to the cam than anything else... Even though you should be able to adjust things in a lot closer without even touching the torque model...
This also might need to be in the gen 5 section for further assistance ;)