just some food for thought, I went looking for tires on discounttire, if I select that I have an auto it says 15" orig, manual says 16" orig....of course there's no option for a euro spec...

 

JB,
I have been looking through the cis information that I can find...I can't find anything on the pump output pressure, all I can find is that the stock external pump is a 255lph...or about 67-68gph. If I connect my 105gph pump with a regulator will that not get me to the required pressure setting at the motor?

I guess ultimately I am wondering if I have the flow requirement, would the stock regulator not keep the correct pressure? I had a similar issue with my 85 z28...305 tpi, stock fpr made up for the diff. I understand the difference in engineering, but shouldn't the theory be the same?

I'm not trying to sound too much like a DANewb for the Porche 928 comm, but I appreciate all the help...as I said, 2nd 928...the 1st was an 82 5sp when I knew nothing about nothing...and yet thought I knew everything about everything.