TBI to carb Q's

[yoshisv]

I am trying to get my 89 K5 ready for a mud run this weekend. Today i put edelbrock performer heads on along with a performer rpm intake, And a holly 670 street avenger carb. My question is can i leave the electric fuel pump in the tank, And just run a fuel pressure regulator? Or do i have to run a manual pump?

 

[sweetk30]

pressure regulator with a return port to dump it back like a tbi.

 

[yoshisv]

Thanks for the quick reply.

 

[SkysTheLimit]

To piggy-back on this one, will the stock TBI pump flow enough fuel to feed a 800-900cfm carb? would i need to choose a particular regulator for that or what?

Thanks

 

[SkysTheLimit]

Anybody know?

thx

 

[mostwanted]

From what I have heard, a TBI fuel pump is high pressure, low volume. You need a low pressure high volume pump. My holley blue is rated 110 gallons per hour (g.p.i.) and I think like 6p.s.i.

 

[SkysTheLimit]

I know i need the high flow, i was hoping the higher pressure would translate into higher flow when reduced. that's what happens when you half pay attention in physics all those years ago.

guess i'll have to find someone going tbi that has a high flow pump they'd want to trade...