Dual feed fuel rail

We're running 135+ with stock rail and adjustable regulator. 2 nozzles of alky, too. But, cutting and welding a fitting on the rail is no problem. Why not use a single -8AN feeding under the coil pack and two -6AN returns at the front?
 
With two returns, wouldn't there need to be two regulators? I was thinking a Y to feed the front of each rail with the return coming off the regulator, or do I have it backwards?
 
With two returns, wouldn't there need to be two regulators? I was thinking a Y to feed the front of each rail with the return coming off the regulator, or do I have it backwards?

We have done this a few times. :)

Feed both rails from the front with a Y, and weld in a -6AN bung at the rear under the coil pack for your return line to a remote fuel regulator.

Or you can do the reverse like Ken stated. :smile:
 
Thanks! After more consideration I think first I'll get it running simpler with one feed like stock with -8AN and use the factory regulator for the return like stock before I go nuts with it, I have to get XFI etc probably too later. I found there are metric to AN adapters so later I can go from -8 or -6 to the metric/saginaw inlet and only maybe have to weld the driver side to cover the factory pressure regulator port and stick on a return off the back under the coil pack like Nick mentioned.
 
We have done this a few times. :)

Feed both rails from the front with a Y, and weld in a -6AN bung at the rear under the coil pack for your return line to a remote fuel regulator.

Or you can do the reverse like Ken stated. :smile:


Do you see any pros or cons having the dual feed on the rear and interconnecting the two rails on the front?

This is based upon the factory style Champion fuel rails with the FPR on the drivers side in front of #1 inj.

John Martin
1986 Buick T-type
9.71 @ 140
 
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