LS1 Fuel System Pressure Control Question
Thread Starter
Teching In
Joined: Dec 2002
Posts: 20
Likes: 0
From: Midland, TX
LS1 Fuel System Pressure Control Question I am familiar with the Ford returnless fuel system but not the LS1. A few questions....
1. Is the LS1 pump variable speed and returnless with a pressure transducer giving feedback to the car computer and the computer controlling fuel pump speed?
2. If not, is there a return line to the tank and a return bypass type fuel pressure regulator at the fuel rails?
3. Is the return controlled mechanically or eledtronically on pressure control?
4. What typically is done to an LS1 fuel system to run a 150 hp shot wet system? Are there any dips/spikes in the pressure control when the fuel solenoid opens and closes?
Thanks, and I apologize for my lack of experience with the late GM fuel systems.
Joe Lynch
Midland, TX
1. Is the LS1 pump variable speed and returnless with a pressure transducer giving feedback to the car computer and the computer controlling fuel pump speed?
2. If not, is there a return line to the tank and a return bypass type fuel pressure regulator at the fuel rails?
3. Is the return controlled mechanically or eledtronically on pressure control?
4. What typically is done to an LS1 fuel system to run a 150 hp shot wet system? Are there any dips/spikes in the pressure control when the fuel solenoid opens and closes?
Thanks, and I apologize for my lack of experience with the late GM fuel systems.
Joe Lynch
Midland, TX
Re: LS1 Fuel System Pressure Control Question the return line is controled by a fuel regulator, thats near or in the tank, there is a T fitting after the fuel filter, one back to tank, (and regulator) and the other end goes to the fuel rails.
With a large enough pump, your spikes should be minimal, unlike the ford RFS car especially when using progressive setups. I believe a 340 pump should be good for a 150 shot, but ask for a second opinion. Also upgrading the wiring to the pump is also a benefit.
Ryan.
With a large enough pump, your spikes should be minimal, unlike the ford RFS car especially when using progressive setups. I believe a 340 pump should be good for a 150 shot, but ask for a second opinion. Also upgrading the wiring to the pump is also a benefit.
Ryan.
Thread Starter
Teching In
Joined: Dec 2002
Posts: 20
Likes: 0
From: Midland, TX
Re: LS1 Fuel System Pressure Control Question Ryan--Thanks for the explanation. So am I correct in assuming the pressure regulator is strictly mechanical and that the pump is constant speed 12volt?
Here is a link to my little lowly Mustang, if you are interested in seeing my current project....
http://www.anythingcars.com/users/jl...1130launch.jpg
Thanks again.
Joe Lynch
Here is a link to my little lowly Mustang, if you are interested in seeing my current project....
http://www.anythingcars.com/users/jl...1130launch.jpg
Thanks again.
Joe Lynch
