Thread: Super Powershot Qs

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So, I ordered a NOS SuperPowershot system to put on my mostly stock 1970 Nova with a mild SBC350.

I will be following the instructions for the install verbatim, but was wondering if there were any undocumented tips that maybe you could give to aid the install.

I bought a fuel pressure guage to check the line pressure right before the carburetor, and it sits rather steady at ~5psi, regardless of RPM. This is the stock fuel pump, I'm not sure of its GPM rating.

The NOS literature dictates that you should have at least ~65GPH, according to their formula for my application, you think that the stock fuel pump will suffice?

As far as ignition goes, I've heard about running colder plugs, and regapping them for this application, what should I be looking for as far as plugs go?

And the 2* retard per 50 extra HP applies then, I should back off my timing by 4 degrees to run the 100shot?

And lastly, what about a fuel pressure regulator? Should I buy one for this project?

Thanks in advance, I'll try to post some pictures as the project comes together, stuff gets here on friday.

for the plugs yeah a hair cooler is a good idea, on the timing that 2* retard is for total timing, you dont hit your nitrous at idle RPMS right? so you just need to adjust your mechanical or vaccum advance... .. also just a little warning... nitrous on a stock motor is going to tear the crap out of it.... your gonna bust a rod or somethin, think about it... 100HP just being thrown on that stock assembly just isn't good for it.... it wasn't made to handle that kind of power, you need to get some forged rods and probably some better pistons.... or you can wait til you blow it and then you can do it

Originally posted by 70 Noca
So, I ordered a NOS SuperPowershot system to put on my mostly stock 1970 Nova with a mild SBC350.

I will be following the instructions for the install verbatim, but was wondering if there were any undocumented tips that maybe you could give to aid the install.

I bought a fuel pressure guage to check the line pressure right before the carburetor, and it sits rather steady at ~5psi, regardless of RPM. This is the stock fuel pump, I'm not sure of its GPM rating.

The NOS literature dictates that you should have at least ~65GPH, according to their formula for my application, you think that the stock fuel pump will suffice?

As far as ignition goes, I've heard about running colder plugs, and regapping them for this application, what should I be looking for as far as plugs go?

And the 2* retard per 50 extra HP applies then, I should back off my timing by 4 degrees to run the 100shot?

And lastly, what about a fuel pressure regulator? Should I buy one for this project?

Thanks in advance, I'll try to post some pictures as the project comes together, stuff gets here on friday.

A stock motor can handle about a 125 shot of n2o. You got to run it rich though. Backing off the timing is great idea, as is cooler plugs. Just remember to fatten up the mixture. Go with some Accel restricted plugs.