Help me pick fuel system parts
 

I'm aiming for around 425-450 at the wheels, with the possibility of more in the future. And I need to pick out what fuel system components to use. I already have my Wolf 3D, the Aeromotive 1000 hp pump, and an SX billet inline fuel filter. Both the pump and the filter have -10 AN fittings. What pressure regulator should I use? Is this one a good choice - the 131-01-BF http://www.aeromotiveinc.com/products/inject_reg.shtml Is there anything else I should think about?

Any reccomendations on which fuel line to use? I know it seems trivial, but that stuff isn't cheap. How about tips on chosing a fuel cell?

And last, what would you think of 850's in the primaries and 1600's in the secondaries? Is that too much of a transition? Does anyone know somebody who runs that setup successfully?

Thanks guys ... Ron Foreman just got back in the country today, so I should FINALLY have my engine soon. I can't wait to actually drive it!

thats a pretty nice regulator, but i didnt see that it is a rising rate regulator. i think if your going to have a big motor and turbo you should go for a rrfpr to be on the safe side. maybe someone else can help a bit more:)

I've got some web pages that might help...

This one has a form where you can enter injector sizes, fuel pressure, etc. and it will calculate how much power your fuel system will support:
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

I also just had my A'PEXi BNR32 fuel pump flow tested. This is a pretty beefy pump:
http://www.maxcooper.com/rx7/parts_i...exi_bnr32.html

I don't think you should use a RRFPR because you'll have big injectors and a programmable EFI system, and thus don't need it. An RRFPR is somewhat temperature dependent and is not that great for fine tuning. The adjustable regulator you posted a link to is a good choice.

I think -6 fuel hose would be a good choice for your goals.

-Max

Yea, I kinda figured a rising rate would do more damage than good ... would act to throw off my efi tuning. I went ahead and ordered that Aeromotive regulator.

Why do you say -6 line? Is there any reason I wouldn't want to run -10 line to the engine? The pump, fuel filter, and regulator all have -10 fittings. Would it be hard to keep the right amount of pressure in a line that big for my relatively "low" hp levels?

Also, is there any considerations that I should think of in making this a road race car? That's its primary use ...

I guess if the pump is beefy enough for -10 it should be okay. I wish I remembered the details, but someone tried -10 on their car and it didn't work too well because the pressure was slow to build on startup. The extra volume of fuel in a big line running the length of the car is also subject to inertia that puts a huge load on the pump and might lead to starvation when accelerating (right when you need it).

However, all my fuel line advice is based on hearsay, so take it with a grain of salt. My guess is that if the pump you got has -10, that size would probably be fine. It is definitely overkill, though.

-Max

-10 would be overkill ... but unless there's a good reason why it wouldn't work, why would I want to use reducers? The pump is a monster! I have no doubt it could easily fill a -10 line.

Anybody else want to share :D

Hey Ryan!
Do you and your motor a big favor and go with the #10 fuel line. The reason the pump is designed for that size is so that it can flow the high volume it was designed for. On your application you can get away with a # 8 line but you'll still have to feed the pump with the #10 and that's a must!

crispeed
87TII
9.20@150mph

Alrightie ... -10 it is. Now can somebody tell me, is there any reason I should spend 4 or 500 dollars on an ATL or Fuel Safe fuel cell when I can get a basic aluminum cell from Jegs for like $180?

Are you planning on having a surge tank up front?

The -10 should be great, but besides the fact that you're road racing the wicked 8-] acceleration your car can produce would put alot of load on that fuel pump.

Put that wolf to the test. Run those 850's and 1600's.... :-)

R

I was wondering are you using:

1. a fuel sump
2. tapping the existing fuel tank and using bulkhead fittings
3. a fuel cell
4. a feed line going through the top of the existing fuel tank

Where are you mounting the pump? In the car, under the car, under the passenger seat :dunce: ? And I heard those aeromotive external pumps are loud as hell :D. I guess more noise to complement the exhaust. --Tommy

For a street car i would leave the stock tank but you should weld a fuel sump to it. You should always draw fuel from the bottom of the tank and NEVER suck it from the top. Then mount your filter and fuel pump underneath the car. Also use -10 lines please. If your going to do it DO IT RIGHT. Then connect your fuel line to the rails and then the regulater and then back to the tank. Use a -8 line for the return line.

Aeromotive pumps are excellent pumps! the only thing better would be Weldon Pumps. And don't worry so much about the noise. You wanna go fast you have to pay the price somehow right?

I think the possibility of this remaining a street car went out when I removed the headlights, turn signals, windshield wipers, etc etc etc :D

I'm going to get a fuel cell. It's going to be a bottom pickup, and have the pump mounted right under the cell. My question is what if anything special should I look for in a fuel cell? Or are those basic Jegs aluminum cells ok for road racing?

Ryan, Just get the Poly cell Like I have, They are light weight and bottom pick up like all fuel cells. Here is where I got mine http://artmorrison.com/F_FuelCells.htm
The Aluminum ones are nice but they weigh more than the poly
http://artmorrison.com/images/98-57d.jpg
I have the 5 Gallon poly cell but since you are doing some road racing then I would go with the 12 or 16 gallon horizontal
http://artmorrison.com/images/98-57c.jpg
[img]

Thanks Greg ... those look good to me too. I don't understand why I would need to pay 5 or 6 hundred bucks for an ATL or Fuel Safe cell.

And what about rx7club.com being a sponsor of yours :D PM me what you're thinking, I'd be game.