Supercharger Questions

BigEd · 12-26-2002, 11:16 PM

I have an ATI Procharger with intercooler that peaks at 10psi @6000RPM. 94 GT 5 spd, stock motor except for Ecam as you can see below.
I'd like to clarify some of the posts on this thread with the experience I've had with mine.

My supercharger never affected my idle or driveability. The dump valve is open until you nail the throttle so the engine operates as normal.

The FMU jacks up fuel pressure proportionately to manifold pressure. It does not affect idle or light throttle fuel mixture at all. It acts on positive manifold pressure only (boost conditions) which you only have when you nail the throttle pretty heavy.

My boost level is exceeding the limits of my 19# injectors to the point of lean out pinging in cold dry weather. (I thought it was timing but it isn't). The FMU is already raising fuel pressure over 100psi. I would run 30's or higher if you could. It would be best to have injectors big enough to run without an FMU. You can do a search, I think even on this sight, to get a calculation on what size injectors to run based on HP.
my 2 cents

12-26-2002, 11:16 PM	#19
BigEd Registered Member Join Date: Mar 1999 Location: Lexington, SC Posts: 56	I have an ATI Procharger with intercooler that peaks at 10psi @6000RPM. 94 GT 5 spd, stock motor except for Ecam as you can see below. I'd like to clarify some of the posts on this thread with the experience I've had with mine. My supercharger never affected my idle or driveability. The dump valve is open until you nail the throttle so the engine operates as normal. The FMU jacks up fuel pressure proportionately to manifold pressure. It does not affect idle or light throttle fuel mixture at all. It acts on positive manifold pressure only (boost conditions) which you only have when you nail the throttle pretty heavy. My boost level is exceeding the limits of my 19# injectors to the point of lean out pinging in cold dry weather. (I thought it was timing but it isn't). The FMU is already raising fuel pressure over 100psi. I would run 30's or higher if you could. It would be best to have injectors big enough to run without an FMU. You can do a search, I think even on this sight, to get a calculation on what size injectors to run based on HP. my 2 cents __________________ Black 94 GT 5 speed. 10# Procharger, E cam, 2 chamber Flows, 3.73 gears, MAC offroad H pipe, MSD 6AL, SpeedBrain 12.94 @ 104MPH

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
96 Cobra Supercharger questions	mosibobo	Modular Madness	8	08-09-2006 01:50 PM
Vortech Supercharger	-viscid-01-GT-	Modular Madness	5	05-09-2003 11:53 AM
Supercharger Questions	Wicked	Modular Madness	1	02-24-2003 03:54 PM
Have questions about your blower? J.R. Granatelli attending chat tonight!	88COBRA	Windsor Power	0	02-12-2003 11:59 AM
supercharger questions	88LXonDAmove	Windsor Power	1	06-10-2001 03:35 PM