Question about turbo.
 

How many pounds of BOOST should a stock 91.5 Cummins have? I have had it checked and it only has 11lbs of BOOST. Is that where it should be? If not how do I improve it?
ALSO, Will adding more fuel help it to spool up any faster?

I believe this is being answered in the other thread.....take and search. It gets asked at least every other day. Scroll through a few pages and read titles. You can learn a lot by reading.