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View Full Version : 5.0 supercharger questions


mkwood4
08-20-2012, 09:52 PM
Alright I got a used Paxton sn93 supercharger they guy that I got it off had it on a stock 5.0 all he had done was plug wires and this supercharger. Now I put it on and with it running I put the discharge tube on and the bitch stalls out. Any input would be great
John4cam
08-21-2012, 06:20 AM
is your car converted to mass air?
mkwood4
08-21-2012, 06:39 AM
Yeah switched the harness and computer
John4cam
08-21-2012, 06:43 AM
how many pounds of boost? Intrercooled?
John4cam
08-21-2012, 06:53 AM
Was there any supporting mods done to the car before the sc? Still have 19LB injectors? Stock intank pump? If so those are two things I would change before any blower was installed.

Search for blow through mass air meters also. I'm sure theres tons of new things on the market by now.
venom
08-21-2012, 07:39 AM
Does the car run w/o the blower? If the blower belt was off, does the car run?
Did the kit come with a FMU to adjust fuel pressure under boost?
Correct ECU for the MAF and injectors?
mkwood4
08-21-2012, 08:38 AM
Thanks for the response but I got it. My mass air sensor was the problem.
John4cam
08-21-2012, 03:38 PM
I hope you're not running the stock injectors without an fmu.....

does the car have a 255 intank? Don't wanna see you stranded somewhere :)
mkwood4
08-21-2012, 03:48 PM
Got an fmu and 255 intank. I figured it out thing is running great. My mass air ****ed up
mkwood4
08-29-2012, 04:35 PM
Ok i got 30lbs injectors and meter to match. do i still need to run that fmu or can i just set my fuel pressure to 40 and let it go.
John4cam
08-29-2012, 04:48 PM
Without a tune I would run the fmu. How much boost?
mkwood4
08-29-2012, 05:45 PM
5-8lbs
mkwood4
08-29-2012, 05:46 PM
But I thought fmu was made for a specific injector size
Viper_ed
08-29-2012, 08:53 PM
Throw the FMU in the garbage and get an adjustable fuel pressure regulator instead and set the fuel pressure between 38-40 psi at idle.
mkwood4
08-29-2012, 09:20 PM
I have and adj regulator Already.
John4cam
08-29-2012, 10:06 PM
If you ditch the fmu I'd get a tune.
Viper_ed
08-30-2012, 01:31 PM
If you ditch the fmu I'd get a tune.

Beauty of a Fox, you can pretty much get it real close with fuel pressure and distributor movement until you get into high power complex combos.
mkwood4
08-30-2012, 02:18 PM
Beauty of a Fox, you can pretty much get it real close with fuel pressure and distributor movement until you get into high power complex combos.
even with the 30lb injectors and meter. i just dont want to **** anything up on it.
John4cam
08-30-2012, 03:57 PM
Beauty of a Fox, you can pretty much get it real close with fuel pressure and distributor movement until you get into high power complex combos.

They're deff. more forgiving than the obd2 cars but I'm just stating what I would do personally. Just so I have piece of mind...

It actually seems like most tuners are turning foxes away now because of the old wiring connections ect. I know Lund is one of those.