Austarion

Im in the middle of doing the twin cam convertion and the subject is well covered on this forum. My question is do I need to upgrade/uprate the fueling system, like uprating the fuel pump or using an adjustable fuel pressure regulator?

Thanks in advance,
T-man

Bosch 984 pump is an easy bolt in upgrade

Whatever you do... DO NOT PUT AN ADJUSTABLE REG on it... with its another variable in the turn that is an aspro cure. :beer

Redzone. From memory isn't the starion fuel pump a in tank fuel pump? Also have you recived the email I sent you regarding the rear crank shaft oil seal?

Starion vr4. What do you mean? Not to fit a FPR I thought it would have been a good idea to slightly raise the fuel Preasure? Please correct me if am wrong.

Cheers,
T-man

T-man wrote: Starion vr4. What do you mean? Not to fit a FPR I thought it would have been a good idea to slightly raise the fuel Preasure? Please correct me if am wrong.

Cheers,
T-man

A STD Starion FPR is a 1:1 ratio... meaning if you increase boost 5PSI the Fuel Reg also increases fuel pressure by 5PSI.... 10PSI Boost=10PSI fuel Pressure rise.

A Massiport Rising rate Reg can increase FP by 1:1.5-3:1.... Meaning for 5PSI Boost = 7-9PSI FP increase... 10PSI Boost = 15-20PSI FP increase.

This makes tuning difficult as the fuel Pressure isn't linnier, or constant. I have wasted countless hours tuning engines because of a rising rate Reg.

Starion fuel pump suits on top of the tank..

I received one pm about the oil seal carrier & replied to it?

Doh! I'm a dumbass! Didn't see the ultra small notice at the top of the page saying that there's a message.

My bad,
T-man

Im running a stock starion fuel pump and seems to be ok for now during break-in. getting a 500 HP one in few weeks tho

Starion VR4 wrote:Whatever you do... DO NOT PUT AN ADJUSTABLE REG on it... with its another variable in the turn that is an aspro cure. :beer

My adj reg is fine ??????