MakeItHappen
Enthusiast
So i just went to get my GTS tuned for the first time, has a Roe w/8lb, all the bolts ons, W/M (not used for this tune) and the MSD voltage up box hooked to the stock fuel pump.
At 4000 rpm or so, its putting down 535rwhp and 600rwtq and the charts inc A/F look good i believe they were mid 11's.
Checking voltage on the MSD box, i believe it was 16v at 11" of vacuum, 18v at 0 psi boost, and 20v @ 9 psi.
I have about 50 psi of fuel at the rail up to 4400rpm or so, and then it drops off drastically to about 25psi after that.
Question is, has anyone dealt with a fuel pressure drop off like this ? Likely culprit ? Stock fuel pump can handle 650rwhp or so ?
Was planning on starting with fuel filter, as idk how old it is, but apparently its on national back order for at least a month from the dealer, so i will likely try and find online unless someone has one ?
If the fuel filter is clean, would it likely be the pump ? Is that voltage too high on the MSD box and burnt out the pump ?
I mean it works fine until about 4400rpm under all apparent conditions, and im running out of fuel ?!
Thanks
At 4000 rpm or so, its putting down 535rwhp and 600rwtq and the charts inc A/F look good i believe they were mid 11's.
Checking voltage on the MSD box, i believe it was 16v at 11" of vacuum, 18v at 0 psi boost, and 20v @ 9 psi.
I have about 50 psi of fuel at the rail up to 4400rpm or so, and then it drops off drastically to about 25psi after that.
Question is, has anyone dealt with a fuel pressure drop off like this ? Likely culprit ? Stock fuel pump can handle 650rwhp or so ?
Was planning on starting with fuel filter, as idk how old it is, but apparently its on national back order for at least a month from the dealer, so i will likely try and find online unless someone has one ?
If the fuel filter is clean, would it likely be the pump ? Is that voltage too high on the MSD box and burnt out the pump ?
I mean it works fine until about 4400rpm under all apparent conditions, and im running out of fuel ?!
Thanks