Fuel system advice.
05-26-2023, 06:38 PM
#11
BEACH PARTY
Platinum Member
The wiring is pretty simple. You use a fuel pump safety switch (Holley) and wire the start circuit to the om-side of the switch. If there’s no oil pressure, the fuel pump is not on unless the starting circuit is energized.
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Batmeat (05-27-2023)
05-26-2023, 08:52 PM
#12
Registered
I tried that Baker pump on a 900hp engine and it didn't work for me. It would be down to 3psi at WOT. They sent me the 15psi springs for it so I plumbed it with a return regulator and although it kept the pressure up, you could see every stroke of the pump on the pressure gauge(needle moving so fast it was a blur) and kept destroying gauges in just a few minutes of run time. I ditched the whole mechanical pump setup and installed a Weldon electric pump and went trouble free boating. I spent a lot of time, trouble and money trying to keep it simple with a mechanical pump. I wouldn't do it again. Weldon for the win.
A buddy had mechanical and elec fuel pumps on his Cig. The elec was nice to fill float bowls when needed and allowed for eng off fuel leak checks. A few years ago I was thinking abt using both, set up for redundancy (i.e. have elec operate if eng ign was on ( or oil press present) and fuel press was below a certain value). May still go that route some day.
Last edited by zz28zz; 05-26-2023 at 09:00 PM.
05-27-2023, 09:55 AM
#13
Registered
Thread Starter
Quick Fuel 30-175QFT 175 GPH Bypass Billet Electric Fuel Pump (holley.com)
I ran this feeding two 850 cfm carbs when I was carbed....still have it in a box actually if you're interested...obviously it's electric but has a built in regulator so it was pretty compact which I liked. It was on a 468 with a 8-71 probably 750ish hp
I ran this feeding two 850 cfm carbs when I was carbed....still have it in a box actually if you're interested...obviously it's electric but has a built in regulator so it was pretty compact which I liked. It was on a 468 with a 8-71 probably 750ish hp
05-29-2023, 09:04 AM
#14
Registered
I had a 7.5 non regulater dead head system and it would drop fuel pressure at wot.
Went to a Baker 15psi, regulated, return to tank.... Ran flawless.
Went to a Baker 15psi, regulated, return to tank.... Ran flawless.
05-29-2023, 05:37 PM
#16
Registered
I’ll probably catch some get for this, but:
I run an aeromotive A1000, lots of people don’t like them but I haven’t had any issues with the pump itself. It runs a return line back to tank, regulator set to 6 or 7 psi feeding two 850 holly hp carbs, 14-71s, supporting 1080hp. Works pretty good. Simple and clean. I have switched on the dash to run the pumps independently.
that would support what you are wanting to do.
I run an aeromotive A1000, lots of people don’t like them but I haven’t had any issues with the pump itself. It runs a return line back to tank, regulator set to 6 or 7 psi feeding two 850 holly hp carbs, 14-71s, supporting 1080hp. Works pretty good. Simple and clean. I have switched on the dash to run the pumps independently.
that would support what you are wanting to do.
