kind of confused what size fuel lines to run for my 20b?
I'm planning on running my two rp fuel pumps(supra pumps). any ideas what size sending and return lines. Also do I need bigger pumps.

I'm going to be using a t88h. The motor is street ported, dowel pinned with 3rd gen rotors and housings and water/methanol system trying to make 650-700whp. 550-600whp for the street.

 

probably should add Im using 3 850cc primaries and 3 1600cc secondaries

 

so im thinking -8 sending line and -6 return line any thoughts? Also im planning on using the steel braided lines with an fittings anyone have anythoughts on those?

 

I'd run separate lines to each fuel rail. But that's just me doing overkill.

 

Our setups sound fairly similar, except I'm running an Aeromotive Eliminator pump, mounted outside the tank (but switching to dual intank pumps when I get the time), and smaller primaries (750cc).
I ran one -10 to a Y in the engine bay, -8 to each rail, then back to the FPR, then -8 back to the tank. It's overkill I think. If I did it again, I'd probably step each size down. -8 to -6's, then -6 back to the tank.

 

I considered -10 also but it seemed like (at least in my mind) that -10 might just drop the fuel pressure too low. Im shooting for 700whp for the track 550 for the street.

what do you guys think about using those stainless steel braided hoses and anadonized aluminum connectors ? I've heard problems from some people but I also see most top fuel cars using them. considering their budget and amount of research they do for EVERYTHING I cant imagine them using anything less than the best. or is it just to comply with regulations?

 

My first setup was 2 -6 feeds, then the stock feed changed to the return. Fuel supply was fine to support 25psi boost on race gas. Now it's the same as Paximus's but I added a 3rd fuel pump when I went E85.

 

what hp did you end up getting on race gas? what is it like driving the car.

 

Never had it on a dyno.
It is a blast too drive. The turbo is maxed out at 25psi. You do get use to the speed and then crave more. The clutch is the only thing I will change. It is tough to drive, I'll be getting somthing else down the road.

 

I still have the 13B, but I will be changing out all of my stock fuel lines with stainless braided line. 8 feed and 6 return. Probably use Earls or Russel fittings...I'll figure out exactly at the time if installation.

If you're planning on running those kinds of HP numbers, you might take into consideration of installing and auxiliary injection system. Such as water, methanol, or alcohol.

 

Im planning on using a water meth setup something like 20-30% meth and 70-80% water Im thinking that the lower methsetup will allow me to drop intake temps down low enough to get away with running less than a 3 row intercooler so i can give the radiator better flow and better boost response ( theoretically). the haigher water amount should be good for keeping egts down and steaming out carbon build up.

I built my fuel pump setup the other day using XRP fittings. I ran two -6 lines to a junction block and they exit together into a -8 line to the motor a and fuel pressure regualtor. then I run a -6 line from the fuel pressure regualtor back to the tank.

 

BDC has been running 100% meth with no intercooler with great results. You can run a small IC, but I would run 100% meth. Mixing it with water is a pain in the *** and is the cheap way out with such an expensive setup. At least you can have a piece of mind that you are getting a higher octane rating with 100% meth.

I'm running 100% meth under boost on the Seq. Turbo FD with good results. I'd never run 50/50 or less.

Give these guys a ring. They make great kits and are durable.
http://www.alkycontrol.com/

 

I've decided to use XRP fittings and the stainless braided lines. has anyone had in problems with these? Other than of course cutting the hell out of your fingers putting it together.
Is there any downside to going this route?

 

The alcohol will destroy the lines after awhile. If you plan on using alcohol, use teflon-core hose with brass ends. Otherwise, with gasoline, it'll work just fine. I personally would invest in doing a -10AN hard line underneath the car then split it off to a pair of -6 or -8 feeds and returns to a single regulator.

B

 

The Aeromotive catalog has a pretty good "power planner" section.
http://www.aeromotiveinc.com

As mentioned already by BDC, you will probably want to use hard line under the car. The rule of thumb for hard line is 5/16" OD for 300bhp, 3/8" OD for 500bhp, 1/2" OD for 1000bhp.

If you don't have a fuel pressure regulator yet, I recommend getting one of the Aeromotive or SX regulators that has pulsation damper properties. Otherwise, you should probably install an aftermarket pulsation damper on each rail.

Parallel is the way to go. It's not overkill, and many aftermarket fuel pressure regulators have two inlet ports for this purpose.

I would be more comfortable with a name brand like Earl's, Russell, or Aeromotive. Keep in mind that 37deg JIC and 37deg AN do not have exactly the same type of thread, so it's not advised to mix them.

 

wow! I thought going -10 might be too big but maybe not.... Im going to run it on pump gas (shell 93 premixed and AI). Maybe I shoud just go parallel and run a 3rd supra pump hey i really cant lose can I? I will post up some pics when i get back from vacation of what i have setup so far. thanks for the advice guys