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Discussion Starter · #4 ·
355, 010 block, stock crank, procomp h beam rods, speed pro forged flat tops, old school crane solid roller 501/501 lift, 236/[email protected] .50. On a 112 lsa. Summit aluminum heads with the 200 cc runners I believe there basically like a brodix ik200. Hardland sharp 1.5 roller rockers and a Vic Jr with a Holley 750 dp.
 

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Discussion Starter · #6 ·
I've heard mixed stuff about procomp, there so so I think for the price of 100 bucks from a buddy brand new I can't complain. I was thinking a Holley black should cover it, unless you believe I need a stand alone fuel system.
 

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355, 010 block, stock crank, procomp h beam rods, speed pro forged flat tops, old school crane solid roller 501/501 lift, 236/[email protected] .50. On a 112 lsa. Summit aluminum heads with the 200 cc runners I believe there basically like a brodix ik200. Hardland sharp 1.5 roller rockers and a Vic Jr with a Holley 750 dp.
Sounds like a winning combination to me. Spray it!
Speed Pro forged slugs are good. No worries.
Just keep the RPM's reasonable, or that stock cast crank will start flexing.
( Did you have your crank assembly custom balanced? ALWAYS a good idea. )
 

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Discussion Starter · #12 ·
Sounds like a winning combination to me. Spray it!
Speed Pro forged slugs are good. No worries.
Just keep the RPM's reasonable, or that stock cast crank will start flexing.
( Did you have your crank assembly custom balanced? ALWAYS a good idea. )
Not yet, it's up in the air, I have a 400 sbc also its a toss up between the two either or need pistons, I just feel the 400 will cost more.... I have pistons for the 400 but the cr is way way too high
 

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You'd be best to run two separate fuel systems.

I would install a small fuel cell under hood, along with a fuel pump and fuel pressure regulator.
for the nitrous system. Fill this fuel cell with 110+ octane unleaded race gas.
A carter P4594 pump and 3/8" fuel line is plenty for this.
Another Carter P4594 at the back of the car will support the engines fuel needs
run the engine on 92+ octane premimum and the nitrous on 110.

Very simple. and you will have it covered. get a fuel pressure gauge that reads in 1/4 lbs accuratly
You will find this very effective in fine tuning the nitrous system.

Most people run a good single pump, a regulator and a splitter with a gauge to monitor the pressure. No need for 2 different fuels, just run race gas when you race.

Having said that, I do agree with everything you said. Your idea would certainly work fine, and I was thinking about doing a setup like this on my truck. I am running a mechanical 6psi fuel pump, and I am not sure it would properly feed my carb AND my nitrous plate together.
I believe I would have a pressure drop, and my nitrous system needs to maintain 5-6psi while spraying.

The 3 things that kill a nitrous engine are: lean fuel ratio, too much ignition timing, running fuel that does not have the proper octane rating.
( also safe to go with a colder rated spark plug above 150 shot )
 

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Not yet, it's up in the air, I have a 400 sbc also its a toss up between the two either or need pistons, I just feel the 400 will cost more.... I have pistons for the 400 but the cr is way way too high
2 things I don't like about the 400sbc are:

1. Siamese cylinders and steam ports
2. Short rods.

#2 is why you always see people turning a 400 into a 377 or 383.
Destroke it, and you can run 6.0" rods with the right piston set.
( I'm a big fan of LONG connecting rods. )
 

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This is not true. On a drag car this is the preferred location for the fuel cell.
It is much safer under hood.
As long as it is mounted and plumbed correctly, it is fine and will pass track tech.
Be sure that the length of flexible hose that runs from the firewall to the engine
for the nitrous system is good braided steel line.
Small 1 gallon to 3 gallon upright style fuel cells that mount underhood are readily available.
Thats what they are for.

If you look, at the track you will find many drag cars with the fuel cell and fuel system all underhood
whether a nitrous car or not. Ther are many advantages to having the fuel cell and pump mounted under hood,
including safety. Including the fact that the volume of fuel onboard is much less.
Having the fuel cell mounted close to the engine negates the need for high fuel pressure.
5 to 7psi for the carb is just fine and 5 to 8 psi is fine for the nitrous system with a adjustable regulator.
The nitrous fuel system response and pressure regulation is much more consistant.
Yeah but.............



Opps!!!.

The above aside,not real keen on having engine heat confined to the engine compartment heating the fuel.Don't matter that much with a EFI system,but with carbs it does.
 

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This is not true. On a drag car this is the preferred location for the fuel cell.
It is much safer under hood.
As long as it is mounted and plumbed correctly, it is fine and will pass track tech.
Be sure that the length of flexible hose that runs from the firewall to the engine
for the nitrous system is good braided steel line.
Small 1 gallon to 3 gallon upright style fuel cells that mount underhood are readily available.
Thats what they are for.

If you look, at the track you will find many drag cars with the fuel cell and fuel system all underhood
whether a nitrous car or not. Ther are many advantages to having the fuel cell and pump mounted under hood,
including safety. Including the fact that the volume of fuel onboard is much less.
Having the fuel cell mounted close to the engine negates the need for high fuel pressure.
5 to 7psi for the carb is just fine and 5 to 8 psi is fine for the nitrous system with a adjustable regulator.
The nitrous fuel system response and pressure regulation is much more consistant.
I'd like to see the rule book on this.. is it all cars or tube frame/cert. cars
 
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