NOS question

[nsxlover]

What is the largest HP shot you can put in an NSX with a wet setup. I have a fuel pressure cutoff switch, full throttle switch a purge kit and a remote opener. It has been on the car for about 6 enjoyable months. I also had a B&M adjustable fuel regulator installed today with a new ACT clutch. What should I have the pressure adjusted to? At idle it is around 42 stock. The other mods that I have are cat bypass pipes and Injen intake.

 

[nsxlr8]

as long as the fuel pill matches the nitrous one (use pill matching for a 44psi set up like on a mustang. The corvette uses a 55psi set up and the pill chart will run you a little lean, so use the 44psi chart) you should be able to run 125 hp on pump gas (93 octane) any more than that an you run the risk of knocking. run race gas on anything higher. up to 250hp if your nuts are big enough!

 

[nsxlr8]

Oh yeah, run 48psi at idle with the vacuum line dis-connected at the regulator.

 

[nsxlover]

Why would I run the vaccumm line disconnected? Doesn't that make it a constant pressure that would not change? Right now at idle is is at 48 and when it gets to 4000 rpm it jumps up to 70. That gives more fuel when the NOS is on. Is that too high? Thanks for the advise. BTW I have the 150hp nozzles in it. 62 NOS and 35 fuel.

 

[nsxlr8]

OH MY GOD NOOOOOO!

You are running a wet kit right?! 35 size fuel right?

I'm NOT saying KEEP the vacuum line off of the regulator! Just when you test for correct adjusted fuel pressure, you remove the vacuum line to the regulator to make the regulator think it is at wide open throttle (Zero vacuum) it should bump up to 48psi. when you put the vacuum line back one to drive, the pressure should read around 30something psi at idle. This is the correct way. that 35 size pill is set for a 44psi fuel system at wide open throttle, so don't change a thing. DO NOT let the fuel jump to 70psi. WAYY too much fuel. Please fix this immediately. you are going to hurt your car if you don't.

Don't run the 150 shot unless you are runing race fuel. Keep it down to a 100 shot for 93octane or less. You WILL show signs of detonation every so often if you go with a higher shot on 93 octane. 52nitrous pill and a 32 fuel pill.

Please call me with any more questions. I will be more than happy to help you on your install and to a VERY fast NSX.

(832) 489-5626

Bruce