When running nitrous, i was always under the notion that either you must use a wet setup, or use a dry setup that has a regulator to bump up fuel pressure when spraying. A guy around where i live says he simply hooked up a bottle, nitrous line, nitrous solenoid, small line and a fogger and sprayed w/o a regulator. Correct me if i'm wrong, but you must supply extra fuel somehow, right?

 

His exact words:

Am I right, or am I just a dipstick?

 

a GOOD nitrous setup wil have some sort of vacuum line that taps into your FPR, therefor controlling your fuel pressure when using a dry setup

if you want a wet setup, then you have to tap the fuel line itself somewhere and feed fuel into the line so the nitrous and fuel mix BEFORE the combustion chamber

 

I thought that w/o a nitrous-regulated fpr, then you would have to set the fuel pressure high enough to be stoich when spraying, making it extremely rich when off the bottle; and that w/o some sort of regulator, just pumping nitrous into an unaltered engine would make it pop! Am I wrong?


[Modified by LudeyKrus, 10:33 PM 2/12/2003]

 

Yes that's possible. NOS sells the kit under the name of "Sneeky Pete" kit. It's not a very good set up because you have to run rich when you are off of the bottle. Basically the nitrous just allows you to burn the extra fuel that you are always pumping into the cylinders. You can't run a large shot with that type of set up without sacrificing a lot of drivability off of the bottle.

 

But would a Honda/Acura have enough extra fuel to run a 50 shot w/o bumping up fuel pressure? They must run REALLY rich in stock trim to do that!

 

You aren't getting away with a 50 shot and no extra fuel. If you are interested in doing this setup I can tell you of better ways to hide a wet kit.

 

Thanx, that's exactly what i wanted to know. I was just trying to tell this ******** there was no way he was spraying a 50 shot w/o either bumpin fuel pressure or using a wet set. Him and his friends are REALLY tryin to show me up as an idiot when it comes to nitrous, so I wanted to make sure I knew what i was talkin about.

 

Woah, woah hold up. He can run a 50 shot. **** he can run a 100 shot with no extra fuel. The car just won't hold for long. Have him show you the jet if you want to find out if he's bullshitting you. The jet will have a number on it that you can get the shot size from.


[Modified by laughinxxx, 7:43 PM 2/12/2003]

 

How long is long? My friend messed his LS teg motor by running a little lean on a 75 shot, I figure spraying a 50 shot on the stock fuel pressure will blow it pretty darn fast! I'm sure he could go maybe 5-10 seconds on a decent shot w/ no fuel, but he couldn't run it for a significant amount of time, could he?

 

That's like asking how much nitrous a motor can handle. You never know until you pop it. My guess is that he isn't running a bottle warmer and has really low bottle pressure(aka he's not running a true 50 shot) so the motor may still be holding. I seriously don't see the car holding for more than two bottles, but that's just a guess.

 

thanx

 

I was under the impression that stock Honda engine could hold a 55 shot (Zex) no problem, I was told to retard the timing a few degrees and possibly colder plugs but other then that a 55 shouldn’t do much damage as long as your not hitting the rev-limiter.

 

Doesn't the Zex kit come with something to boost the fuel levels? I would NEVER even try to spray at all without some FPR, etc. That would be like strapping on a turbo system and not tuning at all.

 

ZEX systems DO have a line that splices into the vacuum line on the FPR to up your fuel pressure while the system is armed

 

Exactly, you can run a 55 shot on any dry kit with just colder plugs and premium fuel, because they increase the fuel pressure when you spray.

 

i just got my NX Wet kit installed i was gonna run 75 shot on it for now, i was told i could run a 75 shot all day on my motor and it wouldnt affect it much whats your theorys on it.
H23A (non vtec) has 75 shot
my H23(VTEC) has 100 shot
what do you think on the shots im running on them whats safe?


[Modified by GOTNOS, 7:10 PM 2/13/2003]

 

That's what I thought. This thread seesm kinda pointless because anyone who isn't willing to shell out a few extra bucks to save their engine is either or

 

That was my EXACT reasoning about it all: you wouldn't just strap on a turbo w/o upgrading the fuel system. Here's the thread, for those interested:

http://importsouth.infopop.cc/6/ubb....6856015522&p=2

Hehe.....SOME people just can't accept that they're wrong!


[Modified by LudeyKrus, 3:50 PM 2/13/2003]

 

hey by chance thje guy that said this, his name wouldn't happen to be nick is it?

back in the day i used to run a 50 shot, the only adjustment i made was pulling the vacume line off the stock fpr, getting a few extra psi. i used to heat the bottle to 1200 psi w/a blow torch. the crappy autometer a/f gage never went lean till it was bumped to a 70 shot. i ran ~3 bottles (10lb)and a few small ones (3 lb) on the 50 and 2 bottles (10 lb) on the 70. it never blew, it seemed fine even when i was rebuilding for turbo.

knowing what i know now, i would never do it like this again, or suggest anyone do it, but it can be done, our p13's run pretty rich.

 

Thanks, thats what I was wondering.

 

I'm not quite sure if the guy's name is Nick. You mean to tell me we run rich enough from the factory to run up to a 70 shot w/ just pullin the fpr line?! Dang! The guy said he had done it on a VTEC Prelude, a GSR, and some civic, and I said no way.

 

i would say no, except i did it. it was most lickly lean w/the 70 shot, those autometer narrow bands suck, it might have been ok w/50 shot...but like i said dont do it.

you can get the n20 fpr for 50 bux, as a matter of fact, i have one i bought to put on there, but never did. you can still build a good cheap kit. if you want it ill make you a good deal.

Vinny

 

Now you are bringing fuel adjustments into the equation. You don't need an adjustable fpr to run nitrous you just need to adjust the vacuum going to the stock one.
GOTNOS, I don't plan on going above a 100 shot on stock internals with my H22 and I will be spending some time on the dyno before I run it.

 

ok ty so running a 75 shot on the h23 non vtec is about safe and the 100 shot on the h23vtec is just lil to much for now?