zooq

will the stock FPR handle two walbro pumps? or do i have to go with an after market FPR?
i'll be running a single turbo and will most likely do 20+ psi ( T70 turbo)

SPOautos

I havent had any problem running with the stock fpr, its a pretty simple piece and I havent heard of one going bad.

The main reason most people HAVE to switch out is if you get a custom fuel rail...cause the stock regulator wont bolt up to the custom/aftermarket fuel rail

STEPHEN

zooq

don't you think that the pressure from the 2 pumps will overwhelm the FPR?

SanJoRX7

I'm not an expert on this, but from what I recall many people go with an aftermarket RRFPR when they go for the high HP/boost applications. I'd consider checking out the single turbo forum for that stuff because they generally produce more HP than stock twins (and the vast majority of us still run the stockers sequentially).

rynberg

The pressure regulator REGULATES the pressure from the fuel system. The pumps don't drive the regulator, it's the other way around...you have to make sure that your pumps are delivering enough fuel at the fuel pressure you are hitting at max boost.

I think it's all a moot point anyway, because if you want to run 20 psi on a T-70 turbo, you will likely have to run 1600cc secondary injectors anyway, which will require an aftermarket fuel rail and regulator. I suppose though, that if you ran 850cc primaries, 1300cc secondaries might get the job done. I don't know. See if anyone else is running that turbo at that boost level and see what their fuel system is.

$150FC

well, stephen runs high boost and high hp. ~425rwhp at, what, stephen, 18 or 19 psi?

IGY

By running the 2 walbro's throught the stock regulator you will see a higher static fuel pressure. You will know if the pumps are to much when the fuel pressure doesn't go up with boost and in some cases the pressure will start jumping all over the place.

zooq

sorry guys i forgot to include my fuel setup:
PFC with 2 850s and 2 1300s and a rebic 3 with 2 720s.
after what IGY wrote i think i'll get me an aftermarket FPR
Is putting the SX FPR to hard? ( Labor cost)

I guess trying to be cheap on these damn cars doesn't work