Fuel System Limitations

Reply Subscribe

Thread Tools

Search this Thread

Oct 27, 2006 | 08:32 PM

qwiketz

Thread Starter

Melting Slicks

Joined: Jul 2004

Posts: 3,277

Likes: 32

From: Mission Viejo California

Fuel System Limitations

What are the limitations of the stock lines as far as flow or hp is concerned? What about the stock fuel pressure regulator? If I toss a really big fuel pump on there will I have trouble getting the fuel pressure down to stock levels?

Oct 27, 2006 | 09:06 PM

Aardwolf

Race Director

Joined: Jun 2004

Posts: 13,922

Likes: 700

From: WI

Fuel pump flow rate does not change the pressure, excess goes back to the tank. Stock lines and HP, a lot!

Oct 27, 2006 | 09:39 PM

93-383

Burning Brakes

Joined: Oct 2006

Posts: 834

Likes: 0

i have been told the stock pump will feed about 400hp if you are getting a good burn. as for the lines yes alot I have seen people who have had to T-joint the fuel inlet so that each fule rail was fed equaly since the crossover pipe on the fuel rails is in serries they needed it in parrallel but I think that was 396 supercharged motor puting out about 700+hp

Oct 27, 2006 | 10:05 PM

Pete K

Race Director

Joined: Feb 2004

Posts: 12,517

Likes: 19

I ran a 10.90 et on nitrous using a stock pump(replacement borg warner) and stock lines.

Oct 27, 2006 | 10:10 PM

_twisted_

Safety Car

Joined: Nov 2004

Posts: 4,991

Likes: 5

From: The Pines South Jersey

One thing that hasnt been mentioned yet, is the wiring.

The voltage drop on the stock oem wiring is more of a problem then then lines feeding the rails.

Upgrading the wiring from the pump forward will keep the voltage constant, so the pump will flow as rated.

Oct 28, 2006 | 04:20 AM

qwiketz

Thread Starter

Melting Slicks

Joined: Jul 2004

Posts: 3,277

Likes: 32

From: Mission Viejo California

I'm not worried about the stock pump since it's long gone. I'm worried about the limitations of the regulator or the lines. Some cars have limitations at the regulator; if there's too much fuel flow coming through, they won't be able to keep the pressure steady. The reason I ask is because I already have a 255 in tank and I'm thinking of hooking up a big sx external fuel pump (the efi one). I'm going to change this in hopes of around 800+ hp. SC motors take more fuel than nitrous motors so I'm planning on having plenty of flow and huge fuel injectors(60's or 72's). I'm already running low 11's with the stock converter leaving off idle.

Oct 28, 2006 | 10:12 AM

Aardwolf

Race Director

Joined: Jun 2004

Posts: 13,922

Likes: 700

From: WI

Yeah that'd be a lot of fuel with boost. You could try asking over in the FI/Nitrous section. I ran a search for you there, one post says 700+ HP with stock lines.

Post #2

http://forums.corvetteforum.com/show...ight=fuel+line

Talk about regulators

http://forums.corvetteforum.com/show...ight=fuel+line