Farmer42
Club Member
I am looking for some advice or recommendations for electric fuel pumps for an S30 2/2.
I am currently running a Facet silver top mounted at the back near the tank feeding twin HS6 SU carbs and although it runs fairly well with no stalling issues, it does seem to bog down at higher revs and speeds. I have set the carbs up fine and the float levels are ok but a recent check of fuel pressure at the carbs seems to be a bit low at 2 psi. I have checked all the lines and filters and they all seem ok and as I move the pressure gauge back the pressure increases slightly but not to the extent I was expecting. The Silver Top should be pushing out around 4psi and as far as I know, SU carbs operate on around 2.5 -3 psi so it should be ok.
My thoughts are that the pump is not strong enough to maintain fuel pressure along the length of the lines and I am not getting enough fuel to meet the demand when I kick down. Like I said, I don't have misfires but it doesnt seem to want to rev any further and feels like its holding back. Prior to installing my power steering, I had a mech fuel pump along with the Facet and I didn't have the issues. Unfortunately I had to do away with the mech pump to accommodate the 280ZX P/S pump which bolts where the fuel pump was.
To cut a long story a bit shorter, does anyone have any recommendations for electric pumps that will do the job but not overwhelm the carbs? Should I go for a higher rated Facet, possibly a solid state pump, or should I install a secondary 'pull type' pump in the engine bay that replicates the mech pump or are there any other pumps that I won't need a mortgage to buy that people have used?
I am currently running a Facet silver top mounted at the back near the tank feeding twin HS6 SU carbs and although it runs fairly well with no stalling issues, it does seem to bog down at higher revs and speeds. I have set the carbs up fine and the float levels are ok but a recent check of fuel pressure at the carbs seems to be a bit low at 2 psi. I have checked all the lines and filters and they all seem ok and as I move the pressure gauge back the pressure increases slightly but not to the extent I was expecting. The Silver Top should be pushing out around 4psi and as far as I know, SU carbs operate on around 2.5 -3 psi so it should be ok.
My thoughts are that the pump is not strong enough to maintain fuel pressure along the length of the lines and I am not getting enough fuel to meet the demand when I kick down. Like I said, I don't have misfires but it doesnt seem to want to rev any further and feels like its holding back. Prior to installing my power steering, I had a mech fuel pump along with the Facet and I didn't have the issues. Unfortunately I had to do away with the mech pump to accommodate the 280ZX P/S pump which bolts where the fuel pump was.
To cut a long story a bit shorter, does anyone have any recommendations for electric pumps that will do the job but not overwhelm the carbs? Should I go for a higher rated Facet, possibly a solid state pump, or should I install a secondary 'pull type' pump in the engine bay that replicates the mech pump or are there any other pumps that I won't need a mortgage to buy that people have used?