Most guys run a little one gallon cell up front.

For packaging reasons, I'd like to run in in the trunk with a Holley Blue pump. A three gallon cell should fit back there nicely.

Some people claim that on hard launches, the pump won't be able to keep up. Any truth to this?

No one's ever backed up that claim with "oh damn, my hobbs switch kicked in on a hard launch at the track because I mounted by fuel cell in the back."

It's more like "I heard you shouldn't do that b/c some other guy on a message board said so."

If it is really a problem, I'll either step up to a Holley Black pump for just relocate the battery and run the cell up front like everyone else.

 

I don't know how true that is, because a buddy of mine runs with a 3 or 5 gallon, not sure, fuel cell in the trunk. He pulls 1.4 60's. I've never heard him complain about that.

 

I take it that's with a low psi carb pump?

 

On a Nitrous Injected car, fuel delivery is the most important aspect to a safe setup, and as such, having the fuel system up front will keep the supply more stable. I'd have to check my notes, but if you take the actual weight of the fuel in the line from the front to the back of the car, its NOT light, at launch and even down track this does force the pump to work harder, just as you noted. Its proven in serious racecars, that those with the fuel systems in the front can take advantage of less pump, then those having to push the fuel all the way to the front of the car.

If you insist on doing it this way, I'd recommend a HIGH pressure pump (something that at the pump does 25-30 psi, and then at the regulator you can take it down to the typical 6-10psi tune-ups. This will help stabilize the system. Ideally you want a pump capable of 2-3 times the flowing fuel pressure regardless, to try and alleviate pressure drops.

I'd put the cell in the front for sheer simplification.

 

The Blue pump will support around 400hp in the back. Gravity will effect the pump but it should do up to 400hp with out too much trouble. I would run -10 in to the pump and -8 out just to be sure. If you want to be a little safer run a Black pump. it flows a bit better at higher 10-14psi then the Blue pump.