carbs and Nitrous

[rwhite65]

I am finally getting the new engine in, here in the next week or two. this combo is getting a nitrous kit put on it.

For a 75-100 hp kit, what mods do I need to make to the car's fuel system. The car will have a larger fuel line on it by then, but it still has a stock fuel pump. Do I need to add an electric fuel pump? Fuel pressure regulators?

thanks,
Ryan

[84gt347]

i would grab one of those high volume holly mech fuel pumps and run an aeromotive carb regulator with 2 supply ports. One to the carb and one to the fuel solinoid(sp) Get a fuel pressure guage and watch for a dip in pressure while spraying. if it does, then your gonna need a holly blue or some seperate pump to supply the fuel to the nitrous system. I have seen setups using a small fuel cell with a 4 cyl mustang fuel pump sending race gas to the fuel solinoid, all mounted under the hood.

that sucker will break the seat over on tha spray

[82 GT]

Your fuel pump and lines should flow .10 gallons per hour per HP at 5psi.
For example, a 300hp engine should be able to flow 30gallons of fuel at 5psi. This is what the NOS instructions say for the sniper system.
If you still have a stock pump, I would at least get a high flow fuel pump or go electric.

[Ron1]

I installed a Mallory 140 electric pump, that fed a high performance Edelbrock mechanical pump on my 65 Coupe, daily driver. I then fed the line to a regulator with a 1/8 NPT to install the fuel pressure gauge. One side of the regulator went to the carb, one side to the fuel solenoid. Set pressure at 6 pounds. Also had a Hobbs switch in line that was set at 5 pounds at the N2O side. If pressure dropped below 5 pounds, the sytem shut off.

Ron