jbsblownc5

I've been looking for a solution for the inevitable drop off in fuel pressure toward the end of long canyon runs, or on the last few laps of a roadracing session, for some time now. While my LPE pump, BAP, 55# siemins injectors and boost referenced FPR gives me great fuel pressure on the dyno as well as the first half of my gas tanks, the sloshing effect of the gas in the drivers tank when under a half a tank can lead to sucking air in the fuel line and pressure drops.

The answer to my problem has been solved by Lou at LG motorsports. I called him to see what he does on his world challenge car, and he told me about his surge tank. After alittle coaxing, he agreed to make me a custom surge tank. Lou was VERY helpful on the phone throughout the install!! He also found just the right spot to fit the tank on my car by test fitting it it one in his shop.

I had Mark of Bent Fabrication do the custom install. He did a great job and worked in a very timely manner. Very cool guy who specializes in custom fuel lines and fab work.

Greg Carrol of Blowerworks supplied the Bosch in line fuel pump. He also did the flow tests for me and confirmed that this pump will flow enough for 925 FWHP at 17 volts.

The way this setup works is as follows:

The LPE intank fuel pump fills 3/4 gallon surge tank at top. Then from the bottom lower corner of the surge tank a line goes over to the Bosch pump and that delivers fuel to the rails. The return line dumps fuel directly back into the top of the surge tank. An additional overflow line from the top of the surge tank then ties into the return line that goes back to the main tank.

In this way, we have created a bubble of sorts in the line so as the Bosch pump always has a full surge tank to draw from. No sloshing or sucking air even down to less then a 1/4 tank!!

There were a few hurdles along the way, but in the end the car ran better then ever at Willowsprings Raceway. I hammered it all day and fuel pressure was a steady 60 PSI until boost kicked in, then it climbed to 70 PSI. It worked great right down to the last lap of a half hour session. I go through at least half a tank in one full session on the roadcourse.

There are some pics below as well as a video from Willowsprings Raceway yesterday.

The white Z06 is Ryan0. He has a procharger on a stripped down Z06. He really knows the lines and helped me run my personal best of 1:34.4 yesterday!! I had a couple of 1:35 laps as well.

Again, A huge to Lou, Louis and their crew at LG as well as Mark at Bent Fab for their help in this project. I also want to acknowldege Mike Norris and Les for their input as well.

JB

Click below for video

http://www.corvettekillstories.com/p...inalwillow.wmv

MelloYellow

Looks nice.

Hard to tell where the surge tank is located.
Is it inside or outside the frame in the rear of the car?
Just inside the rear swaybar?

Filter on outlet of pump but not inlet?
Price?

vetterdstr

That is one awesome setup!! Good to know that if I want to switch to something like that, you have already done it and know how it needs to be installed.

VR

Shinobi'sZ

Very cool Joel.

Tony @ MPH

Rock on Joel.

I am growing more and more fond of the idea of running a surge tank also -- it allows you to run a huge pump without sacrificing stock characteristics (fuel level sensor, tank to tank fuel leveling, etc.). I might have built my fuel system differently up front if I had known anything about surge tanks.

Loboost

Glad it all worked now turn up the boost a little more



Les

xtream1

jbsblownc5

It sits up high in the torque tube tunnel near the back of the tranny inside the frame.

After market filter on outlet of bosch pump before it heads to rails.

Not cheap, but R&D never is.
JB

NEPTUNEBILL

Another great video JB you are deff the Spielberg of the forum---you are also having too much fun I miss the canyon's as well--

jbsblownc5

Thanks Buddy!
JB