Fuel system for Nitrous

[mikemustang289]

I am looking to upgrade my fuel system in preparation for the addition of nitrous.

I have a mechanical pump 110 gph and I have been told running a regulator with this pump is not necessary.

My plan is to run AN-6 from the tank to the pump, and then AN-6 from the pump to the carb.

I have noticed that many of the dual feed lines are setup for AN-8 line, I am wondering if there is a reason I should run AN-8 from the pump to the carb?

Also, being that I have never used nitrous, does the additional fuel required for the nitrous also come from the same fuel source? I know a lot of guys run a separate fuel pump but at most I will be running a 100 shot. Do I just T into the line from the pump to the carb?

Also, I am thinking it would be a wise idea to run a fuel pressure guage. I want one I can see from inside the car, not one that screws into the dual feed line where it cant be seen while driving. Can I use a mechanical guage for this? If so, would I just run a separate line off the feed line (AN-4?) to the guage?

Please idvise me since this is all new to me. If you have any suggestions or recommendations as far as what guage to buy I would like to know.

 

[mustangman70]

I have been told running a regulator with this pump is not necessary.

With that pump, on motor alone you donr NEED the reg. But with spray....you need one before the solinoid i believe

Also, being that I have never used nitrous, does the additional fuel required for the nitrous also come from the same fuel source? I know a lot of guys run a separate fuel pump but at most I will be running a 100 shot. Do I just T into the line from the pump to the carb?

You can T into the line. But just make sure to put a fuel pressure saftey switch between that and the solinoid

Also, I am thinking it would be a wise idea to run a fuel pressure guage. I want one I can see from inside the car, not one that screws into the dual feed line where it cant be seen while driving. Can I use a mechanical guage for this? If so, would I just run a separate line off the feed line (AN-4?) to the guage?

Well... you can allways mount the mechanical one outside, on the right car...this can look good.

But normally this SHOULD be done by a electrical gauge, Can you imagine a good ton of gas leaking into the interior at the wrong second?

autometer makes a "mechanical gauge" that mounds the reciever on the outside somewhere which pushes a diaphram which in turn by pressure raises the gauge.


I love phantoms....coolest looking gauge next to the cobalt

 

[iskwezm]

when i ran NOS i used a single Holley Blue pump and ran a 125 shot,3/8 line and it was good enough to get into the 11's.

 

[mikemustang289]

I am not too concerned with running a mechanical guage inside the car; done correctly it wouldn't leak. The reason why is so I can monitor the pressure and know that the mechanical pump can keep up.

I am only talking about a 100 shot. I haved talked to one guy who ran the kit I plan to buy (edelbrock performer) with a completely stock fuel system and pump.

I do not want to run a separate system, and I do not want to go with an electric pump. I already have a Holley mechanical 110 gph. I talked to another guy who runs this pump w/o a regualator with no problems.

I am keeping the stock fuel tank but upgrading to 3/8 line. I don't want to buy a fuel cell so a return system isn't gonna happen.

All I want to know is how to setup the fuel system so I can monitor fuel pressure and at the same time provide fuel for the nitrous.

 

[ForceFed70]

Your factory mechanical pump is good for approx 350hp. If you plan to go over that (nitrous, whatever). Then you'll need to upgrade your fuel system.

 

[mikemustang289]

The 100 shot will be going on my 306 with AFR 185's, custom cam, rpm intake, 650 DP etc.... it should be putting down just over 300rwhp N/A.

Right now I am running the factory pump and lines. I want to upgrade the fuel system now in preparation for the nitrous.

 

[iskwezm]

just use a T and put a inline gauge to check at idle. Withought a guage you can see at WOT,you'll never know what its doing. I never had one, nor did i need it.

 

[mikemustang289]

So you don't think it's necessary to install a guage in the car to see the fuel pressure at WOT?

I don't understand how useful a guage in the engine compartment is if it only gives me a reading at idle. Is the pressure at idle typically the same as WOT?

The only reason I want a guage in the car is so I know for sure that I have enough pressure at WOT for the nitrous and also so I can monitor the pressure when the nitrous is in use.