Hey all:

First I just wanna say that this forum is one of the best ones on Camaro's Ive found. And I would have asked this on the CamaroZ28 board, but that board sucks IMHO. Too many jerks and clicks...

I have a 1995 Camaro that had a 3.4 V6. I swapping in my older 5.7 350 SBC. Now, I know the motor can't handle all that fuel pressure, so I heard that I could swap a TBI fuel pump in my tank over the stock FI one. Is this true? And what model or year TBI pump would be good to buy?

-Rabid

 

why not use a fuel pressure regulator on it?

 

when you say older do you mean carbed?

 

The pump doesn't control the pressure. The fuel pressure regulator does.

I'm using a 255 lph Walbro fuel pump with my TBI. This pump can handle 80 psi of fuel pressure, but I'm running it at 20 psi.

We put a Holley 750 DP on an OEM TPI car. The stock fuel pressure was 43 psi (I think, somewhere around there). We have it regulated down to 4 psi. Stock pump...

 

hey how bout that i was actually right!!! lol

 

LoL, well I heard that a FI pump would blow a fuel regulator's diaphram in about a minute, heard that alot. So I can just put a fuel regulator on it and go from there? It won't blow? and what should my fuel pressure be for a 350 650cfm carb set-up? Im getting a holley 'jection kit later but It will be carbed for a while. Also, what's a good/affordable regulator to use?

-Rabid


PS: Thanks! :hail:

 

couldnt you also just unplug the intake fuel pump and run a mechanical?

 

Nope. So long as you use return style regulator. Mallory makes a return style regulator that can be found in Summit or Jegs. All the carb Astro guys use it, and I've helped install one on the Trans Am I mentioned.

It HAS to be a return style tho. If you try and use a 2 port regulator yes you will blow the diaphram out.

This is the one...
http://store.summitracing.com/partdetail.asp?part=7607

 

If you wanted to use a two port regulator, you could run it like this. This is basically how a 3 port works, it's just all internal.

 

Great! thanks guys. Okay on my 95' there are 3 lines. My engine is out and my electrical system temp. down. How do I tell which is the pressure line and which of them are the return lines?

BTW: I'll order that part ASAP, thx 4 th3 l1nk!

-Rabid

 

You could get under the car and see which line has the fuel filter in it. Then you could follow it up to the engine compartment.

 

Done!


Thx astro/guys.


-Rabid