So first let me apologize if this has been answered on the boards multiple times. I have been searching for ~2 hours now and I really just can't find the info I am looking for.

My fuel pump went out over the weekend. My fall term, as I am a college student, is over in a week and I am trying to make a trip home. I can install a new pump, that is not the issue, however while I had the tank down I was going to upgrade.

I have a 90% complete moderate 350 tpi build on the engine stand at home that is hopefully going in over Christmas break, so I was going to swap the stocker for a walbro 255 when I dropped in the motor.

Obviously I can't wait for that now, so my question is will the much higher pressure pump blow away the stock TBI FPR?

If I have to put a stock replacement back in I will, but I'd rather not if I don't have to.

The only thing keeping me from just trying it and seeing what happens is that I am 3 hours from home and need to have some sense of reliability.

Any info is greatly appreciated.

-Dan

 

you can use a tpi pump delco ep241, not a fan of the walbro since the bad batch.

 

The pump doesn't make the pressure, the regulator does.

 

Correct me if I am wrong, but the pump should push some high pressure, whatever that may be and then it is the regulator's job to lower that pressure to whatever the car needs to operate.

If that is true, then the high pressure coming from the pump will be regulated down to ~16 psi on a TBI car, if I am not mistaken. My question is can the stock regulator hold up to the increased input pressure on it without blowing through?

I hope I was able to be clear that time, my OP was a little clouded now that I reread it.

 

I have not heard anything about this, care to share any details?

 

No, the pump moves some volume and the fuel pressure regulator presents a restriction which raises pressure in the line.

 

I see, so then it should make no difference what pump is in the tank?

 

Not much... As long as it moves enough volume to develop the required pressure, and isn't absurdly large that the return line isn't a restriciton.

 

Cool, that means I won't have to buy more than 1 pump

Thanks for the info sir.

 

A Walbro pump is overkill. It can pump 255 LPH (67gallons). no way your car could possibly use that much gas and you will sending most of it straight back to the tank.

 

I think I'd rather have fuel and not need it than need it and not have it. It doesn't hurt anything to recycle what is being used? I am mainly looking for a higher quality pump than the stocker.

 

I make 350 HP and have never been starved for gas. I had a Walbro pump at one time and it died within 3 months, maybe I just got a bad pump?
I was giving this lesson from ex-drag car driver. Just thought you could save some money.

 

Don't do it with the stock TBI set up. The volume of fuel will overwhelm the stock FPR & TBI unit, causing the fuel pressure to skyrocket. A 190 LPH pump on a stock TBI set up is the most volume it can handle and still maintain the proper fuel pressure.

RBob.

 

Will a stock tpi pump be too much? Like I said, I just need it to run til christmas when I swap to the tpi motor.

After reading into more bad walbros I think I'm just going to grab a delco for a tpi and call it a day.

 

A stock TPI pump is OK.

RBob.

 

Thank you sir.

 

I had lunch with Dyno Don yesterday and he told me he installed this one in my car.
http://www.ebay.com/itm/FUEL-PUMP-GM...0503c9&vxp=mtr
It pumps 160LPH and I first used it with my 305 and now I use with my 355.
So far no problems.