Guys,
I just bought a 406 and it comes with everything but the distributor and fuel pump just because the guy's running an electrical one on his car. Would an edelbrock performer do alright or do I need the victor one? What about the holley chrome high out-put one? Basically, I don't really know exactly how much power it makes but it has an 800 double pumper and a 250 shot of nitrous.(Just to give you an idea of power). Will 6 psi and 110 gallons per hour be enough or do I need more with the nitrous?
Thanks,
Donnie

hey if that has what it sounds like i would go with no lower than a 120 gph pump with the better being 140 or more, with that motor and nitrous i would think it would run 11's easy 10's if it would hook but we need more on the combo, anyway doesn't matter electric or mechanical just get a 120 gph plus pump that puts out at least 9 or 10 psi and then regulate down to what ever you want when running nitrous, goodluck
Jake

Jake,
It has iron heads(ported/polished), about 10 to one CR, comp solid 290 cam, 1 3/4 headers, victor jr intake, 800 DP, and I'll be spraying a 250 shot. I'm hoping for mid 10's in a full weight car on the bottle. Will an edelbrock victor pump work? I really want to stick to mechanical...it flows 130 gallons per hour and 13-14 psi w/regulator. Do you think that'll be enough? That's the best flowing mechancal I've seen. How many psi do you think I should run through it?
Thanks alot,
Donnie

Another quick question...the regulator I'm looking at is only rated for up to 9 psi, will that be good enough? The reason I want that one is because it's only 20 dollars in jegs.
Thanks a million,
Donnie

Carter makes a mechanical pump thats flows 172 gph. Summit has it on their website under part# CRT-M60969 for $73.95. Don't know anything more about it though.

Make sure any regulator you use can keep up with the flow of your pump. The best pump in the world won't mean much if the regulator (or filter) excessively restrict it's flow.

ya the vicotr one should do a good job, and that regulator should be fine, you don't need anymore than 7 psi on street or it will push your needle and seats off and flood your engine, so make sure you get a fuel pressure gauge so you can adjust it, as far as the 250 shot of nitrous, i am pretty sure they reccommend a constant 7 psi of fuel pressure, so maybe call edlebrock and ask them, you do not want it leaning out on fuel at wot and spraying nitrous, it won't be pretty, anyway goodluck
Jake

I see vapor lock problems in your future with a mechanical pump. Have you calculated the forces on your fuel system under acceleration? Temporarily running a little low on fuel pressure with a carburetor is not too painful, you have two bowls of gas to fill in the gap while the pump recovers. Temporarily running a little low on fuel pressure with a 250 shot is a whole 'nuther story. The best that will happen is that your nitrous system will shup down on the low pressure switch and you'll abort the run. After this happens 4 or 5 times on a hot day up there in Redding and you lose a bunch of races, you'll be kicking yourself in the *** for cheaping out on your fuel system.

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1967 Nova coupe daily driver
406, 10:1, 224° cam, Q-jet, 700R4, 3465# w/driver
11.75 @ 117 thru the mufflers
18 mpg on the road

Oneofakind- So you don't think I'll be alright with the victor mechanical? I haven't calculated anything but the guy who's running the motor right now runs 7 psi on a mallory 140 pump. The thing I don't understand is how to run on line to the carb and at the same time one to the nitrous solenoid for fuel.
Thanks,
Donnie

A mechanical pump will work just fine if you can figure a way to get it real close to your fuel tank. The forces of acceleration and inertia coupled with the line losses on the suction side will make it difficult for a traditionally mounted mechanical pump to reliably provide fuel on an instantaneuos basis. You don't have to be too lean too long before parts start getting hurt. Is there a reason the previous owner didn't run a mechanical pump?
To run both the nitrous and carb off one pump you need to tee the line before your regulators, running a separate regulator for each system. This will allow you to set the nitrous fuel pressure independent of the carb fuel pressure.

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1967 Nova coupe daily driver
406, 10:1, 224° cam, Q-jet, 700R4, 3465# w/driver
11.75 @ 117 thru the mufflers
18 mpg on the road

A mechanical pump WILL NOT be enough for the motor and a 250 shot. You need a seperate pump for the nitrous and I would recommend the HP mechanical for the motor with a 110gph electrical for the nitrous. Unless you want to blow up your motor.

The only way to go with a 250 shot is a dedicated fuel system for the nitrous. As onovakind said if you go lean on the nitrous system you will be buying parts soon. The fuel side of a nitrous system is not the place to take chances. You can run both motor and nitrous from the same fuel tank/cell, but you should run two different pumps. I prefer electric pumps myself, but you can run the motor on a mechanical pump and use and electric pump for the nitrous. It is a good idea to run a Hobbs switch as well (shuts of the nitrous if the fuel pressure is not right). Nitrous is not very forgiving, all the horror stories you hear are from people getting to greedy or taking chances (like a not well planned fuel system).

Royce

Guys,
The guy who's running the motor right now is using a mallory 140 pump for the engine and the nitrous. He says that it works find and I noticed when I went for a ride that it's at 7 psi. Should I just buy a mallory 140 and run both off of that or do I need another pump? If so, which one?
Thanks,
Donnie

ttt

Get two Mallory 140's with separate regulators, one for the carb and one for the nitrous system. Use two separate pickups from your tank, separate filters, lines. etc. Mount your regulators next to your carb and nitrous solenoids to assure accurate regulation. Install dedicated fuel gauges for each regulated system.

Not to ask a dumb question but is that the only way to do it? The only reason I ask is I'm not exactly rolling in money right now but if I'll blow my motor without both then I'll do it. Basically, the guy running it right now runs both off of the 140 and says it keeps up, but, is he pushing it?
Thanks a million guys,
Donnie

Donnie,
Several guys have suggested the same thing, but you don't seem to like that advice. Seriously consider running two pumps. You "might" get away with one, but if for some reason it doesn't work you will be building a new engine. Which one is cheaper in the long run? As someone on here said "if you can't afford to do it right once, you can't afford to do it wrong twice" ( I really like that quote, thanks, to whoever said that originally). Generally Donnie it is suggested with anything over 100-125 HP shot that you run a dedicated fuel system (pump, line, regulator). It's your car/engine do it the way you want, but like I said before the fuel side of a nitrous system is not the place to save a dime. Good Luck

Royce

[This message has been edited by camaroman7d (edited 12-02-2002).]

Royce,
You're right, sorry if I seemed to argue or anything. That's not it at all, I just don't have the money for two fuel systems right now so I'll just hold off on the nitrous for awhile. I was just making sure that 2 systems were a must, I know that the fuel side of nitrous isn't the place to try and get away with anything.
Thanks again guys and sorry if I seemed like an ***,
Donnie