Forced induction guru's
Instructor
Joined: Dec 2000
Posts: 244
Likes: 0
From: Sweden
Re: Forced induction guru's (HJV11)
You cant just add bigger injectors..............
You need to control the fuel vs boost, you didnt tell us what car/computer you have.
So the easiers way is to add a FMU or superfueler unit.............
You need to control the fuel vs boost, you didnt tell us what car/computer you have.
So the easiers way is to add a FMU or superfueler unit.............
Thread Starter
Racer
Joined: Jun 2000
Posts: 469
Likes: 0
From: Norfolk VA
Re: Forced induction guru's (Oden)
I have a 94 Vette, I was just curious. If you have a preset boost level, why cant you just set your fueling requirements to the boost level with the installed injectors?
[Modified by HJV11, 9:11 AM 8/2/2003]
[Modified by HJV11, 9:11 AM 8/2/2003]
Pro
Joined: Nov 1999
Posts: 623
Likes: 0
From: Toronto, ON, Canada
Re: Forced induction guru's (HJV11)
My answer is, it depends on your setup for forced induction.
I'm running a supercharged '94 with 42lb injectors and the FMU removed. I have tuned the fuel on a dyno and am getting ~ 12:1 a/f ratio at WOT. As long as you plan on driving either normally or WOT during racing this setup should be okay. In this case boost is consistent depending on RPM, you can program the computer via RPM tables. If the boost pressure will vary during driving and is unknown then a FMU would be better.
I.e. If you plan to run a turbo setup (were boost can differ with RPM) then I'd be weary of trying to program injectors with just the stock computer. In this case you'll need to run a boost sensitive FMU or change out to a computer than can support a newer 2-3 bar MAP sensor.
I'm running a supercharged '94 with 42lb injectors and the FMU removed. I have tuned the fuel on a dyno and am getting ~ 12:1 a/f ratio at WOT. As long as you plan on driving either normally or WOT during racing this setup should be okay. In this case boost is consistent depending on RPM, you can program the computer via RPM tables. If the boost pressure will vary during driving and is unknown then a FMU would be better.
I.e. If you plan to run a turbo setup (were boost can differ with RPM) then I'd be weary of trying to program injectors with just the stock computer. In this case you'll need to run a boost sensitive FMU or change out to a computer than can support a newer 2-3 bar MAP sensor.
