Supercharged111
Truly Awesome
- Joined
- Aug 20, 2015
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You can't do that with a pump designed to run at 4 bar. If using an EP381, you need the dual stage bypass like the one he bought. If he had put in a TBI pump when he cleaned the tank and replaced the pump... then he could have used the holley or similar bypass regulator to get the right PSI without killing the volume. It's really doing the same thing, but he just ended up spending double. The only reason to use the double regulator setup is so that you can keep the rest of the fuel system stock. The second he was going to need to replace the pump anyways, he got the opportunity to move to a lower PSI in-tank pump and save money on the regulator. At this point, he is already committed to needing to step down the high PSI because he already put a Vortec pump in it. The only benefit is that he won't have to replace the pump if he goes to a 5.3LS in the future. The downside is that if he does, the regulator he has won't be needed anymore.
I beg to differ. I used a Mallory regulator on a 92 Crown Vic to choke the factory pump down to 6psi for an Edelbrock carb and it worked like a champ. Single stage.