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Old 06-09-2016, 11:58 PM
Mad Scientist
Join Date: Dec 2012
Location: Oregon
Posts: 1,464
Originally Posted by Cloudsurfer View Post
For those who have added Racors (or equivalent) ahead of the stock 10 mic filters, are you still running the factory mechanical lift pump? Any issues with added resistance?

Ideally, I'd like to add an electric pump in the trunk, mount said 2 mic filter element back there, and provide slight positive pressure to the stock lift pump on the motor.

Seems a pump that could deliver 50-60GPH at 2PSI would be perfect for this.
My Griffin is used in place of the primary filter, with the stock lift pump only. In pressure applications the filter is rated for 15psi, although the MFG recommends against mounting after a pump, as a pump will emulsify any water contained and make it less likely to settle out in the bowl, and less likely to be caught by water block filters.

The lift pumps on these engines mean business. They'll collapse fuel tanks and pull air into fuel lines past hose clamps. On top of that, this much larger filter should have less restriction than the factory primary filter at the flow rates these engines see.

I haven't had any issues with mine, and would skip the extra pump. If it's not in the system, it can't fail.
617 swapped Toyota Pickup, 22-24 MPG, 44k miles on swap

Last edited by OM617YOTA; 06-10-2016 at 09:50 AM.
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