Stock Motor
Stock Fuel System

Safe to run a 150 wet shot? Yes or no?
I see a lot of threads about it, but its all mixed. I just want to see some straight answers. Right now I'm running a 100 and its fantastic.

 

I would say no, unless you are planning on rebuilding soon anyway. 150 on a stock fuel system is right at the point between pushing the limit and passing the limit, you might get away with it, you might not. I say don't press your luck. When I still had nitrous and the stock fuel system on my car my fuel pump would give out with a 125 shot becuase I already had cam, headers, etc. Having those other mods plus the 125 shot required more fuel than the stock pump could provide and it was a new pump.

 

Racetronix makes a great plug n play fuel pump

 

what size and how much?

 

Here is the racetronix kit

http://www.racetronix.com/Racetronix..._Pump_Kit.html

 

Thanks for the link! Bookmarked it
Ok so, basically 150 isnt safe. How about a 125?

 

It's been literally 20 years since I last used nitrous, although I am planning to get back into the game in a big way.


In my experience, it's not the 150 shot that will hurt you. There are several folks running a 200 shot on a stock engine.

What's important is the support systems.

My thoughts...?
A Mallory 110 and FPR with return line, hooked to a dedicated fuel cell on the order of 1 or 2 gallons and proper programming. Also, either buy a nitrous controller or retard your timing about 8 degrees.

That's not what I would do on MY motor, but that's only because I'm planning on a much more sophisticated system than what I ran 20 years ago when I was just trying to figure out what Scott S. was doing with his Monza.

 

I have been running a 150 wet shot for a while safely on a stock fuel system and my friend that I bought the car from ran it for two years before that. The first thing we did was install an air/fuel ratio gauge and tuned it to stay safely on the rich side and kept increasing jets until the 9th light started to fade at a 175 shot after that you need a fuel pump in my opinion.

 

what color is the wire on the O2 sensor that you need to tap into for the A/F ratio gauge?

 

We tell our customers anything over a 100 shot to upgrade the intank pump.I know some people spray 150 on a stock car and stock pump.
The best way to know is to have a machanical fuel pressure gauge or put it on a dyno with the air fuel hooked up.
Its better to just spend the 125 for a new walboro pump and move on.
Dave

 

Thanks Dave.
Is an A/F ratio gauge worthless? Ive been reading a lot and I have heard it is, but this is from non-n2o users. Is it worthless for us too?

 

narrowband is useless. wideband is one of the best things to have

 

whats the difference?

okay, I just installed my a/f gauge and the gauge just goes back and forth. Sometimes it stays on rich. I found the purple wire from the o2 and cut it. I then stuck the wire in a butt connecter and crimped them. did i do anything wrong?