[rwhite692]

In my car I have a 434 SBC / twin turbo setup and am mapping out my fuel plumbing. I want to locate the bypass regulator back at the tank, to avoid circulating and heating of fuel by sending (most of) it up to the hot engine compartment / fuel rails and then returning it back to the tank (as has been discussed here extensively, in the past).

My question is, should I run a second regulator (see attached) after the fuel rails (which would be a boost referenced regulator) and then return any fuel bypassed from that second regulator, to the tank, also? The amount of fuel returned from the engine bay in this scenario would be relatively small.

OR, should I just simply bypass back at the tank, and "deadhead" the rails, with NO return to tank from the engine bay at all, and forget about using a boost-referenced regulator after the rails?