dirtyTurbo

Good morning!


I recently acquired a complete dry shot nitrous kit. It was kicking around my friends shop and at $150 i just had to have it. He had it in a Chevrolet cavalier and a Honda accord and he said it worked great.

He made it seem like all I would have to do it wire up it and hook it into the intake somewhere and I could pretend the car has a turbo! But cruising around nearly every nitrous discussion on the forum definitely makes me think otherwise.

So, what would be the easiest way to make use of my not so fancy system on an n/a car? I was thinking of putting the micro switch on the throttle and only hitting WOT after around 3000 rpms and somehow making it way richer when its squirting, is that possible without programming chips/MAF/expensive stuff?

I don't plan on doing anything to beef up the engine if I don't have to so I would use the smallest shot possible to be just a little boost every now and then.

I realize I could buy a $250 civic and run the system without a jet (that what my friend did) but I plan on staying with the look and feel of the 944 line for as long as possible

I attached pictures of what ive got so hopefully someone smarter and I could tell me what ive actually got

Thanks!

odurandina

by all means....

going with a nice sendoff before changing to LS1 (with the same nossss bottle of course) should be cool.

krystar

do NOT run a dry kit w/o standalone engine management.

u need a wet kit. otherwise u'll blow out a piston or something from running lean

86 951 Driver

Need wet kit on these cars, unless you have a nitrious tune.

Jfrahm

Why is a dry kit a problem? It should be possible to use the fuel pressure bump to correct the mixture on a 944 just like on a Mustang. Just do the math, set it rich and dial it back until you stop getting black smoke on the gas. I'd give it a go with 75 or 100 jets in there. The clutch center or R&P might blow but that's life.

-Joel.

Fishey

You don't need a wet kit but honestly those solenoids look old. I would be very careful about that before installing on a vehicle.

75ohm

Post the before and after pictures of the engine, would you? I've got an iron stomach.

krystar

how would u bump the fuel pressure at max RPM when the stock fuel system is already at max fuel pressure? unless you're saying to buy a rising rate FPR...which means messing with the system even more.

go wet, or dry w/ standalone fuel management. or blow your engine.

most modern cars can deal with a 25shot because factory tunes are extremely rich at WOT. but how do you know how rich the factory tune is? you can't unless you wideband dyno it before you start spraying.

Jfrahm

I don't think you understand dry kits.

Fishey

Stock Fuel Pressure is like 40psi (or just under) and is by no means the max of a EFI system. When you raise that pressure via a restriction on the return line (aka Pressure regulator) you will cause the car to increase its fuel to the cylinders by a serious amount and the end result will be a proper A/F ratio when the nitrous is being sprayed. However, like I said that system looks like it needs new solenoids.

krystar

yea u can bump the FPR by messing with the vacuum system...or buy an adjustable FPR. but then you'd also have to plumb the vacuum system so it DOESN'T bump the fuel pressure when you're WOT but NOT spraying nitrous.

Jfrahm

Dry kits have a method to bump the fuel pressure under spray. It works. The typical NOS kit uses a gas regulator to push N2O pressure against the FPR on the vacuum side, allowing 20-40 more PSI of fuel pressure, maybe even more. Some gas bleeds into the vacuum system but this is no big deal in my experience, although I have not tried it on a 944. Putting the FPR on it's own vacuum line is helpful.

There is a chart to suggest how much fuel pressure bump you want for a given shot size but IMO it's good to go high and work towards a reasonable safe level.

-Joel.

porscheminitech

Cast pistons watch out.

mark_uss

this is gonna be interesting.. vrooooom vrooom....NOOOWOWOWOWOOOOOOS...PSSSTTT .clank clank blank...

dirtyTurbo

There was something in the book that came with it that mentioned tieing into the FPR.

So all I would need to do is retard the timing and dump more fuel in while im boosting? that dooesnt seem too hard


This is the most common asnwer I hear, seems to be my only option. Should be fun I'll definetally take pics