Originally Posted by
Loomer
You need to take the car to a pro rather than guessing,
The chip numbers you have given are just prom numbers, nothing to do with the data on it. How can you try to tune the car or know if it is safe to "boost over 10psi" without knowing what the chip is calibrated for?
If its a std chip and you wind the boost up you WILL loose the engine, so i wouldn't go any further.
And yes the fuel pressure at 2.5 bar is way low. Another engine failure in the waiting.
Agree with you , a sure fire way to melt a piston is to over boost a standard set up. That is what the previous owner did to my 2wd Saff when I first bought it and ruined the engine.