procharged 502 fuel system
 

Putting together a fuel system for my Procharged 502 MPI. Running 7 lbs. boost, 72lb. injectors. Couple of things I have been pondering.

My pick up tube is approximately 3/8" ID. I have heard a lot of different opinions on whether that is big enough or not?

Are 3/8" NPT fittings large enough?

I am looking at ditching the stock fuel rail and going with twin extruded rails. Most of the ones I have looked at are a 5/8" ID. Pretty big when I was planning on running -6 line to them?

Talk with Smitty (arcticfriends) he has been down that road and back.

Ive been told the 3/8 pickup is fine but all the fittings should be changed. I went with 1/2 npt x 1/2 barb id and hose. Fitting on tank is 3/8 npt and i put a 3/8 npt x 1/2 barb on there.

Hey Gimme hows it going? Dropped the motor off at Champion Performance last week.

Rob ..... I upped my Pickups to 5/8" ....Ran 10 AN Hose to Aeromotive Eliminator Fuel Pumps then 10 hose to an Aeromotive Y block and then two 8 hoses up to the fuel rails ....m

Thanks I couldn't remember what size hose guys were running. I am hoping that 3/8 NPT fittings will be big enough also. I may drill them out if necessary. I was running 8 AN hose I am going to go to 10AN

Going good. Just pulled my motor and put it on the stand for the winter. Made winterizing easier haha. First thing in the spring I will do some inspecting, change pressure spring in the oil pump, adjust cam timing, and drop her back in. Hopefully that will find those pesky extra horsepowers.

We plumb them in #10 hose. If I have to use a 3/8" NPT fitting, I will use a SS fitting and drill out the pipe side to match the #10 side. By using SS, it will still be strong enough. If you bored out an aluminum fitting, it may break because it will be pretty thin.

With the correct mods, the stock fuel rail can support the power. We have used them on engines making near 1000 hp. This was a 547 ci, Brodix heads, extrude honed intake, 65 lb injectors, M3 making 9 psi.
Eddie

Thanks Eddie, You have helped me a ton with my Procharger set-up. I really appreciate it.

Eddie has a thread on making a new PU for the fuel tank and we used his method and has worked out great ... Aeromotive called for .75 PU's but Eddie said the .625 would be fine .... the larger the pu the more fuel the pump has to lift and the aeromotive doesnt suck as well has it pushes ..... ..... what are you using for ecu's? I have 2 mefi1's that worked great on my prochargers .......




http://www.offshoreonly.com/forums/s...fi-1-ecus.html


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I am using the Holley HP self tuning ECU. I am also Fabbing a pick-up like Eddie has posted. I believe going from 3/8" ID to 1/2" ID makes quite a difference.

My Datalogs showed I was getting enough fuel with the -8 line, 3/8 npt fittings, and 3/8 pick-up running 7 lbs. boost at 5200 rpm. Not sure how close I was to maxing out my fuel system so I want to go a little bigger for a safety margin while I have the engine out. I am also ditching the Cool Fuel now and returning directly to tank.