Fuel pressure with 150 wet

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Jan 27, 2002 | 04:19 PM

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Fuel pressure with 150 wet

I have a Nx 150 kit on a 99 Formula.When I run on motor my fuel pressure drops to 52psi when I run on the spray it drops to 48psi and the car surges.My bottle pressure is at 1000psi.Any idea why it surges?
thanks Steve

Jan 27, 2002 | 06:59 PM

love2xlr8

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From: Barberton, OH

Re: Fuel pressure with 150 wet

Do you have a FPSS? If so is it adjusted correctly?

If you post a sig we could see your mods. <img src="images/icons/confused.gif" border="0">

Jan 27, 2002 | 08:37 PM

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Re: Fuel pressure with 150 wet

I don`t have a fuel pressure safety switch.Does that fuel pressure sound about right?

Jan 27, 2002 | 09:12 PM

Slowhawk

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From: Bridgewater,Ma

Re: Fuel pressure with 150 wet

Have you tried a smaller shot?
The surge could be the fuel pressure.For that big of a shot,I would have bottle pressure at 900psi.
Also you should run it on a Dyno to get A/F ratios.

Jan 28, 2002 | 01:21 PM

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Re: Fuel pressure with 150 wet

It doesn`t surge with a 100hp shot.I also have a cam do you think that matters.

Jan 28, 2002 | 11:00 PM

Slowhawk

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From: Bridgewater,Ma

Re: Fuel pressure with 150 wet

I would try a run with bottle pressure at 800psi with the 150 jets.It sounds like you might be running out of pump or with the high bottle pressure your going too lean.