Mike1982

I was wondering if using reg. gas in my turbo car if it would drop the boost from 15psi to about 11?? I had some car work done and they put some gas in it and ever since then I have lost some boost, 4psi.

Danno

That's the built-in programming on the KLR chip. Also the stock wastedgate spring is weak and creeps open the valve in high-RPms and bleeds your boost. Then the stock turbo also runs out of steam in the upper-RPMs. To get a flat boost-curve, you have to address all three of these points.

hosrom_951

The manual also indicated what is the minimum fuel rate you should run. If you plan on running higher boost levels in teh future, you should also need to run higher fuel grades.

Danno

" I had some car work done and they put some gas in it and ever since then I have lost some boost, 4psi."

The stock boost level should be around 11psi maximum and drops to 7-8psi by redline anyway. If you had some leaks in your wastgate hoses, then that would result in higher-than-normal boost. That may have been the case with your car earlier. Then when they fixed the leaky hoses, it restored boost back to stock levels. Nothing to be worried about.

Mike1982

I just had a Tial 38mm put in my car and after I picked it up it was suppose to be at 15psi but I could only hit 10. So when I go home I looked under there and saw a small vacuum line came undone. Now I have the 15psi. WOW is this thing fast!