fuel pressure vs. smoke

[93oilburner]

Hello all, I run a 93 w250 auto with a He351vgt turbo with 40 horse sticks, piston LP. I burn waste oil and veggie what ever i get my hands on, the problem is to much smoke at low boost. The way it is now i get about 20 psi fuel pressure after the filter. Today on the way into work it was 10 deg and i lost about 5 psi on the gauge down to 15 and almost all my smoke cleared up. Does anyone think a bypass regulator set at 15 would be my fix?

[KTA]

By running more than stock psi you are probably causing the pump to advance too much at low rpms. I would recomend a regulator that would run run no more than 10psi at idle to get the proper timing curve from the pump.

[93oilburner]

seams like people here are using a mallaroy 4307M regulator? How does this hold up to diesel fuel?

[93oilburner]

This works pretty good. Im able to cut fuel pressure down to 5psi at idle and then use the boost reference port to raise it to 15 psi at full tilt. cut the smoke down noticeably. Just got my M&H dynamic timming advance kit in the mail and installed and that has further helped.

[Halfagagga]

As long as the gaskets aren't rubber, any regulator should hold up fine. The ULSD kills that stuff...

[93oilburner]

I run most times on 100% waste oil! motor oil that is. will see how regulator holds up. plus I heat the fuel with a 40 plate heat exchanger.