firebird305

I have a Carter High volume mechanical fuel pump on my car,And i was wondering if it flows enough G.P.H. and has enough P.S.I. to support a 150 horse n.o.s. system. (i've been looking at the n.o.s. sniper system)

Kendol

When using N2O with a mechanical pump it always good insurance to add a pump and feed line dedicated just to nitrous. If you decide to use just your mechanical pump make sure to buy a good fuel pressure regulator and test the fuel pressure under load. If you can maintain 7-12 psi you should be good to go.

94-6spd

If I were you I'd designate an electric pump for the N20 and keep the mechanical one for the carb. It's better to be safe than sorry. I run a Holley blue pump for the carb and the N20. I also have the sniper kit. Make sure you get a fuel pressure safety switch.

Kendol

Though you might be able to get away with it for a while, I think using NOS on a high compression motor with Hyper. pistons is an invitation for disaster. In the past I too tried it, refusing to listen to the experts, until a hot summer day when the motor under went slight detonation and I wound up walking home. Motors using more than 75-100 hp of nitrous should always be built with forged pistons, this isn't as much a recommendation as it is a golden rule. I'm not trying to put your motor down or flame you, I'm just trying to give you help based on my previous experiences. Take the advice as you may, but remember that if you decide not to follow it, you'll have plenty of time to think about what pistons to put in your next motor when your rebuilding the one you have in there now.

B4Ctom1

kieth black claims there hyperutectic pistons ARE nitrous pistons. if you drive around looking for the cheapest gas to buy, then dont cry when you hyperutectic motor crash and burns from detonation. the biggest factor in hyper piston nitrous failure is ring end gap. unless the engine was built with a significant amount of ring end gap, then correct, do not run more than about 75 hp as well do run timing retards or retarded. I always recommend on carbed applications with a mechanical pump (even high volume race mechanical pumps) not to run more than 75 hp. some do, I do not recommend it. I also recommend against trying to run a carb and the nitrous system off that little tiny holley blue pump. one or the other but not both.

94-6spd

B4Ctom1 Why are you against the blue pump running to the carb and the N20? It flows more than enough. The pressure is also plenty. I have the summit hypereutectic pistons with 10.9 compression and have had no problems with 125 hp jets. I always put the best gas in when I plan to use the nitrous though. At the track I usually buy some 110 octane and put it in there. If I'm on the street I buy some 104 octane boost. It's like 6 dollars but worth it.

anesthes

iTrader: (12)

Hyper pistons blow holes in the center.

Forged just crack and rattle apart.

Either way they both break. Detonation is a killer..

Just because a piston is forged, doesn't mean its a "Blower" or "Nitrous" piston. These pistons have different design than regular forged pistons.

Also, piston rings are a big player. Some cheap molley rings have too much blow by under boost.


To answer your question, most carb guys I know run electrical pumps with regulators if they're runing NOS or a blower..

A buddy of mine has made about 200 passes on a 12:1 motor, running a 200 shot with cast pistons.. Amazing that it hasn't blown up yet..

-- Joe