Nitrous for dummies?

juddski88

Freedom Diesel
Jul 1, 2008
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that's got me curious to see if something close to a .30 jet pre IC on the same noid would put you into the 11's. Or would it be too close to the total flow of the noid?
 

JoshH

Daggum farm truck
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It has 11s in it with the jet we were running last night. It should have been running faster than it was on fuel. I probably still need to do some tweeking on the tune and truck setup.
 

JoshH

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11 MPH is huge.

To put into perspective, for us:

475rwhp = 105mph
635rwhp = 114mph
750rwhp = 120mph

I'm thinking you were over 150rwhp worth of nitrous.

That's about what I came up with too. I took a rough guess on weight, plugged it into a HP calculator, and came up with 440 on fuel and 600 on spray.
 

McRat

Diesel Hotrodder
Aug 2, 2006
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Need to be careful with boost referenced nitrous shots.

Should it spray while staging, it can break parts (rare, but happens). Or at a minimum, it can push you out of the beams.

Having a dead man relay that breaks the circuit when the brake lights are on will be far safer, and allows you spray at lower boost levels.
 

JoshH

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Are you starting to spray in 2nd gear or as soon as the boost reaches 25psi of boost?
It started spraying in 1st gear not far out of the hole, well before the 60' beam.

Need to be careful with boost referenced nitrous shots.

Should it spray while staging, it can break parts (rare, but happens). Or at a minimum, it can push you out of the beams.

Having a dead man relay that breaks the circuit when the brake lights are on will be far safer, and allows you spray at lower boost levels.
Very true, Pat. This setup is set with a WOT switch. As long as he doesn't try to stage with the accelerator pedal to the floor, it should never spray while he is staged, but the brake pedal thing is a good idea.
Was this just a test or does this guy plan on running this setup for awhile? I am curious how long it will hold up sparying that much.
He's gonna keep it on.
 

SSchmi5519

LLY Cult Leader
Oct 19, 2008
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I like mine the old fashioned way. Arm switch and a handheld momentary button (think trans brake button).
 

SSchmi5519

LLY Cult Leader
Oct 19, 2008
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What kit was this? Or was this all pieced together... I'm wondering how to get it set to auto spray at tps and stuff.

It wasn't a kit necessarily, just a simple assortment of parts. Bottle, lines, solenoid, arm, and a push button switch.

I like to be able to choose when it sprays, not every time I'm at WOT or above a certain amount of boost.
 

JoshH

Daggum farm truck
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Feb 14, 2007
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It wasn't a kit necessarily, just a simple assortment of parts. Bottle, lines, solenoid, arm, and a push button switch.

I like to be able to choose when it sprays, not every time I'm at WOT or above a certain amount of boost.
It isn't every time you're at WOT or above a certain amount of boost. It's only every time you are at WOT and above a certain amount of boost with the arm switch on. I like the automatic system better than a happy button.
 

SSchmi5519

LLY Cult Leader
Oct 19, 2008
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It isn't every time you're at WOT or above a certain amount of boost. It's only every time you are at WOT and above a certain amount of boost with the arm switch on. I like the automatic system better than a happy button.

So when you cross the finish line it cuts the nitrous as you lift the throttle?

I want the nitrous long gone before i lift.