Fuel System question for boosted cars
09-03-2013 | 10:52 PM
#16
Addict
Rennlist Member
Rennlist Member
Joined: Apr 2002
Posts: 2,197
Likes: 54
From: SF Bay Area
Got a serious stutter right now from one injector not firing, but that's a different issue.
George
90 S4 Grand Prix White (Murf #5)
94 GTS 5-Speed Midnight Blue
06 Cayenne S Havanna/Sand Beige (PASM)
http://928.jorj7.com
09-04-2013 | 12:37 AM
#17
Thread Starter
Burning Brakes
Joined: Jan 2009
Posts: 1,044
Likes: 14
From: El Mirage, Arizona
1. Ditch the BEGI - they suck, the VORTEC FMU is much more reliable.
2. With L-Jet, the fast way is to replace one of the regulators is with a dampener from an 85/86. It's a direct bolt in.
Your car should run 100% stock until boost comes on. This means no need for an adjustable regulator, just the stock one is needed and an FMU dialed in for the amount of boots.
I would so pick up boost directly from the plenum, not the throttle body, to "feed" the FMU.
I would also have a boost gauge tee'd into the same line.
This is an "early warning" system that your FMU is not seeing boost if the gauge is reading zero.
2. With L-Jet, the fast way is to replace one of the regulators is with a dampener from an 85/86. It's a direct bolt in.
Your car should run 100% stock until boost comes on. This means no need for an adjustable regulator, just the stock one is needed and an FMU dialed in for the amount of boots.
I would so pick up boost directly from the plenum, not the throttle body, to "feed" the FMU.
I would also have a boost gauge tee'd into the same line.
This is an "early warning" system that your FMU is not seeing boost if the gauge is reading zero.
