SBC fuel return line

[Tony]

My old engines had a return line T'd into the output port on the mechanical fuel pump. Is this really necessary on a carbed application?

[TomZ]

My old engines had a return line T'd into the output port on the mechanical fuel pump. Is this really necessary on a carbed application?

No... but I would be curious as to why this was done. Mechanical pumps are generally configured to run as dead-heads.

TomZ
Virginia Beach

[MOBILEMERCMAN]

Some thing is amiss. Could it have been on the inlet side? Old Cigs had boost pumps on the inlet side with multi tanks. If it was a return on the outlet side there would be little to no pressure. It may have had a boost pump or something.