I've done a good amount of searching now and I haven't been able to come to a conclusion. I bought a Facet-Purolator electric fuel pump from ebay that was advertised at 2.75-4 psi. In my mind that was perfect for the Z car so I did a buy-it-now (at a killer price imo).

Fast forward a couple days and the pump arrives only the packaging says 4-5.5 psi range. Still is brand new and made in the USA

Ebay woes aside, would you feel compelled to run a pressure regulator with this pump? I have read 3-5 psi for our cars is ok (stock L24 with 4-screws). I understand it's not a bad idea to run an fpr but does anyone think it would be required in this case? Is half a psi rating anything to really be worried about?

Edited August 21, 200915 yr by 70 Cam Guy
fixing typos

I've always heard that the typical (Ideal) fuel pressure for the S.U.'s is about 3 lbs.

I only ran 4 to 4.5 for my Triple 40DCOE Webers. if that tells you anything.....

A decent regulator from Spectre? is about $20 or less. It's the dial top with 3/16" in/out's

FWIW

Dave

Thanks Dave,

I was out camping the last couple days. I agree, cheap insurance/peace of mind is to run a regulator from Spectre or Holley, both of which are under $30. For simplicity's sake I was hoping to avoid running a regulator. My friend has one he used on his (wrecked) drift car that he said I could have to run to have consistent pressure.

FWIW, my stock mechanical fuel pump generates ~3.4 psi according to my fuel pressure gauge (Mac) to the carb inlet. That is, when the rpm's are high enough for the needle to stabilize. I think I'll shoot for ~3.5-4 psi regulated.

4.5 seems high for Webers but I have heard 4 is good for many conditions. Triple Webers are in my future, just a ways off