cant feel the nitrous
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Registered User
Joined: Jun 2006
Posts: 27
From: huntersville,nc
cant feel the nitrous
i just put a 100 dry shot on my ls1 and i dont feel any with the fpss hooked up,but if i run a jumper wire and bypass it,it works.How do those things work are they already set to a sertain press.what do i need to do to use the fpss
Registered User
Joined: Nov 2004
Posts: 2,475
From: Garland, tx
your pummp isnt keeping up...they are set at 35 when you get them...ls1 run at 57...try a walbro intake pump and new filter...
if you wnt first hook up a guage to it and go do a WOT run and see what it does...come back and tell us
if you wnt first hook up a guage to it and go do a WOT run and see what it does...come back and tell us
Registered User
Joined: Dec 1969
Posts: 4,950
From: San Diego, CA
As stated above, connect a fuel pressure gauge to your Schrader valve and then temporarily tape it to the windshield so you can monitor your fuel pressure when you hit the nitrous. If the fuel pressure is dropping, your fuel pump isn't keeping up with the demand and you FPSS is saving your engine 
Registered User
Joined: Apr 2003
Posts: 2,628
From: Pgh, PA
Hate to steal thread, but what PSI should I look for as a WOT N20 run on a LT1 ? Say spraying a 100 shot? I will be putting a Walbro in before I spray on it, but id like to have a ball park idea.
And my FPSS is adjustable. I have a FP gauge, so what would you guys set it at? 3-4PSI lower than what a normal run on a 100 shot gets me?
And my FPSS is adjustable. I have a FP gauge, so what would you guys set it at? 3-4PSI lower than what a normal run on a 100 shot gets me?
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