Dual fuel pump control

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Aug 19, 2024 | 08:02 PM

ScottStaypuff

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Dual fuel pump control

What are you twin pump guys doing?

1) Both pumps full blast all the time
2) One pump on a Hobbs switch
3) One pump on a WOT switch
4) Pulse width controller
5) Other

Aug 19, 2024 | 08:25 PM

TrendSetter

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From: Florida

Haltech running primary pump pwm and aux pumps on a relay activated at rpm and map thresholds.

Aug 19, 2024 | 11:49 PM

LilJayV10

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2nd pump on Hobbs switch. If I was using Holley EFI and not the stock PCM, I'd have the Holley control it.

Aug 20, 2024 | 12:46 AM

Pro Stock John

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I drive around on a Bosch 044 pump, and the Weldon 2345a comes on when I start boosting. E85.

Aug 20, 2024 | 01:01 AM

brutalzo6

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Both pumps full blast all the time. Walbro 450s

Aug 20, 2024 | 09:15 AM

Black_Sunshine_99

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Quote:

Originally Posted by LilJayV10

2nd pump on Hobbs switch. If I was using Holley EFI and not the stock PCM, I'd have the Holley control it.

My last car and my current car are set up the same way using the factory PCM.
Hobbs switch that kicks on around 5 lbs., twin 450's.
Never had any issues.

Aug 20, 2024 | 10:02 AM

Codys89RS

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From: Duluth, Minnesota

On my setup we have dual in take 450's. One runs all the time. The second is triggered through the Holley to come on at 70% throttle.

Runs on e85 as well

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Aug 20, 2024 | 05:50 PM

Floorman279

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nitrous outlet window switch is what im goona do.

Aug 20, 2024 | 06:38 PM

#10

KENS96M6

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From: South Carolina

Using three 450 pumps. Runs one pump then the second and third come on based on boost via a Hobbs switch and Fora system. E85 fuel.

Aug 21, 2024 | 01:19 PM

#11

ScottStaypuff

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I currently have a single Walbro 525. My neighbor uses a Boost A Pump on his Mustang. Has anyone done that with a Walbro 450 or 525? I'm looking for 700whp on E85, anyone think a fuel pump voltage booster is a viable option?

I'm interested in the Voodoo Booster. Does anyone have any experience with it?
https://www.truemotorsports.com/vood...er/single-pump

I also have Deka 80lb injectors, seems like they might be on the ragged edge for my goal so I might go bigger.

Aug 21, 2024 | 01:49 PM

#12

Black_Sunshine_99

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From: Washington

Quote:

Originally Posted by ScottStaypuff

I'd add another 525 or 450, you want a surplus of fuel supply in this case, not just enough.
Injectors, everyone seems to do well with Bosch 210's.

Aug 24, 2024 | 08:24 AM

#13

forcd ind

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From: woodbine, md

I run one pump and the other on with boost, also have the ability to man. switch pumps, incase one fails.

Aug 24, 2024 | 08:39 AM

#14

NoGo

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From: Mass

Used to run both on all the time (twin 450's). It heats the fuel up way to much on an hour drive - causes odd tuning and drivability problems.

Now a hobbs switch turns on the 2nd at 2 psi.

Aug 24, 2024 | 09:25 AM

#15

Floorman279

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From: Wilmington, DE

Quote:

Originally Posted by NoGo

Used to run both on all the time (twin 450's). It heats the fuel up way to much on an hour drive - causes odd tuning and drivability problems.

Now a hobbs switch turns on the 2nd at 2 psi.

yea i wanted to wait to chime in but yea i wouldnt ever run both all the time as others have mentioned