Pre-Filter
Thread Starter
TECH Resident
Joined: May 2004
Posts: 792
Likes: 2
From: SoCal
Pre-Filter I would like to install a fuel pump pre-filter on a nearly stock LS1 swap. Though the tank has a screen, I would feel better about keeping small particulates out of the fuel pump (in-line Walbro #392, 255 LPH). I'm thinking the Summit 40 micron #SUM-230101 which is rated at 130 GPH (492 LPH), though they specify it for carbureted applications. The 130 GPH is likely its rate at something like 7 psi. Any reason why this can't be used as a pre-filter for EFI?
There's also a 75 micron Earl's filter that's rated at 4 GPM (100 LPM). That one ok? Since this is between the tank and pump, there is no excessive pressure requirements.
Thanks,
Andy1
There's also a 75 micron Earl's filter that's rated at 4 GPM (100 LPM). That one ok? Since this is between the tank and pump, there is no excessive pressure requirements.
Thanks,
Andy1
The part after the pump is a check valve to prevent fuel siphoning. (The pump needs back pressure to be effective and it also helps at startup.) The Bosch pump has a check valve, but it's lost in the conversion to AN fittings.
...and the fittings weren't so bad once I found Earl's #1 Store online, but if I had to do it over again, I would go with a turnkey Rock Valley in-tank setup. The guy who fabbed my tank talked me into building the external set-up. We're both idiots!
