Visit The Dirt Forum for More Information

Author Topic:   KSE- fuel pres.
modman97
Member
posted April 24, 2003 10:26 PM
I put on a KSE tandem pump,and have a Gaerte 750 ALKY carb. I have the 160 pill in bypass. Carb is Jetted at 88/90. #8 line to fuel log.
Im carrying 2-3lbs. at idle.(which is suppose to be ideal) Not too sure of pressure on straightaways. The car stumbles half-way down the shoot because its too fat. (guessing 7-8ish) Car is brutal on restarts!
Plenty pressure 'WITHOUT' load on the engine. (12-14lbs.)
Car temp. is cold, approx. 150-160 deg. at back of manifold after several laps.
-I have tried playing with the floats.(setting floats with return line crimped at 9lbs.) NO LUCK!
-Thinking of going to bigger bypass jet, then taking jet out slowly watching engine temps. Am I heading in the right direction?
Any input would be GREATLY appreciated!


dirtbuster
Member
posted April 25, 2003 08:47 AM
In my opinion 12-14# is too much pressure. You really only need around 8# at wide open. I would work on getting your top end fuel pressure set and not worry about your idle pressure. We have ours set at 7.5-8# wide open on the track and it just barely bounces off 0 at 1500rpm idle. In the shop work it to get about 6.5-7# when you rev the car to about 5000, that should get you close and keep an eye on it when you get on the track.

I would reccomend buying an adjustable diaphragm type regulator to plumb into the bypass port of the KSE pump and get rid of the pill system. Makes adjustment a lot easier, and the one with the idle jet you can adjust your low speed and high speed pressure independently.

WPP
Member
posted April 25, 2003 10:11 AM
I run a blp belt drive pump with a barry grant bypass behind the carb with a 100 pill in it about 9pds on topend your bypass must be working because the car only stumbling half way down the straight with all that pressure i would say it was just too much i am surprised it don't stumble when you get back on the throttle comeing off the corner with that much pressure


modman97
Member
posted April 25, 2003 02:50 PM
Thanks guys!
It stumbles on restarts,and half way down the shoot,then its fine. So any straightway reading is errored.
I get 12-14psi. WITHOUT a load on it.
I just hope we havent washed out the bearings already.


modman97
Member
posted April 26, 2003 05:03 PM
Dirtbuster-
I think I like the idea of the adjustable regulator. Who sells the type regulator your speaking of?
After you remove the poppet and spring,Just how is it tied into the bypass outlet on the pump? Do you still run a fuel log with this set-up? Thanks!


dirtbuster
Member
posted April 28, 2003 09:20 AM
holley makes one i think the part number is 12-803 or 12-804 whichever is high pressure. There is an orifice inside you will have to tap to accept holley jets in order to adjust high and low speed pressure independently. I think these run around 25$. We just upgraded to a Barry Grant billet piece that has the jet already in it and was designed for alcohol use. It runs around 70$ .

If you go to this setup PM me and I can help you with the settings.

Take out the poppet etc. and leave the port open and then s crew in the correct fitting to accept the regulator (3/8npt i think) then s crew on the regulator and run your return line from the regulator. We still run a fuel log with ours although I have seen guys use the correct AN fittings and hose to make a dual feed line that works too.

[This message has been edited by dirtbuster (edited April 28, 2003).]

modman97
Member
posted April 28, 2003 12:43 PM
Dirtbuster-
I ordered the BG belt drive reg. from Midwest this morning. I will PM you when it shows up. Thanks A Ton!


modman97
Member
posted May 12, 2003 04:03 PM
Dirtbuster-
Check PM's. Also, where are you picking up your fuel pressure? On the Regulator or the log?


dirtbuster
Member
posted May 12, 2003 05:50 PM
modman i sent you a pm.

We pick up fuel pressure right off the fuel log.

modman97
Member
posted June 15, 2003 09:42 PM
Dirtbuster-
We finally picked up our first UMP feature win Saturday. Thanks a bunch! However,we are having some fuel pressure problems. Please check your PM's!