Thread: Fuel pressure changing with BEGI
07-31-2009, 05:22 PM #1
Fuel pressure changing with BEGI
Can any1 tell me that has some expirience with the BEGi fmu if they have seen the pressure changing when putting the key on.
I got my BEGi all setup last night and did my first tests on the hose all ok apart from I needed a restrictor for the boost line. I had my turbosmart set at 30psi for idle, the BEGI set at around 45 and then the pressure was going up to much with boost till i fitted the restrictor.
So I came home tonight and when i first put my key to the post I checked my pressure and it was in the 60s??? So I adjusted it down with the engine running but with the boost line unattached to 45psi again and did some more testing with the restrictor and all is looking good for the amount of gain I am getting but I left the ski for around 2 hours and went back out to fit my LC1 for some water testing. Checked my pressure on the key again and now its reading 68psi?????
I could not start the ski again as it was late and i didnrt wana give any1 the piss so will have to wait til tomorrow now. Just wanted to know if any of you had seen this before??
07-31-2009, 05:32 PM #2
Do you have the check valve installed in the proper direction? My orfice is a #67 drill bit (.8382mm .033")and the needle valve is four turns out. Set the Begi base PSI with engine idling boost line disconnected. No need for a boost line to the 1:1. Under vacuum the Begi should be open and the 1:1 controls idle.
07-31-2009, 05:44 PM #3
I put the key on and I should see what the BEGi is set to coz there is no vacume due to engine not running but instead of seeing 45psi where I set it Im seeing 68psi???
I couldnt try starting it coz of noise so im not sure if it will act as it should as soon as I start the ski.
I made my restrictor with a .8mm drill bit but It prob drilled a little over which would put me right where you are with yours. R88
07-31-2009, 05:47 PM #4
Is the Begi new? maybe a stuck diaphragm. Wait till you can start it and see if she works under vacuum.
07-31-2009, 05:50 PM #5
I have seen what you are taking about however I disconnected the boost line and checked again at idle and it went back to where I set it. I cant explain why but I did see what you are talking about. BTW the restrictor that came with the begi worked great on both of the begis I've set-up.
07-31-2009, 05:51 PM #6
07-31-2009, 05:53 PM #7
I got mine off e-bay and at first I was having smiler problems come to find out my diaphragm was upside down the metal shim should face the seat.
07-31-2009, 05:55 PM #8
07-31-2009, 05:57 PM #9
07-31-2009, 05:58 PM #10
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