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Conventional vs Solid state relays for fuel pumps

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Old Jun 29, 2025 | 08:07 PM
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thatsupnow's Avatar
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Conventional vs Solid state relays for fuel pumps

What do y'all prefer?? I run an MSD solid state relay module (the red one) for my two fuel pumps and transmission fan and I have only recently started monitoring my fuel pump voltage and have been noticing a voltage drop of about 0.5-1.0v momentarily. I'm not sure how to feel about this drop considering it's a boosted application. Looking online I see that SSD's have that drop but still seems a bit wild to me, obviously nothing has happened.......yet.

I'm considering going back to conventional as I don't ever recall those momentary voltage drops but then again I wasn't monitoring voltage. I have been looking at the MSD 4 channel relay module to replace the SSD but I'd like to get some outside opinions on whether or not it is something to be concerned about or that the drop is so fast that I'm crying over spilled milk?? Lemme know what you think
These units are set up for ground trigger but can be used for +12v trigger as well
These units are set up for ground trigger but can be used for +12v trigger as well
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Old Jun 30, 2025 | 06:53 AM
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Re: Conventional vs Solid state relays for fuel pumps

If you're just observing that momentary ramp up, but operating voltage is steady and and full, I wouldn't worry about it.
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Old Jul 1, 2025 | 09:18 PM
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thatsupnow's Avatar
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From: Armstrong B.C.
Car: 1991 camaro Z28
Engine: Forged 370" LS turbo s488
Transmission: Built 4L80e FTI converter
Axle/Gears: MWC 9" 35 spline 3.25 gears
Re: Conventional vs Solid state relays for fuel pumps

Originally Posted by ratfink6923
If you're just observing that momentary ramp up, but operating voltage is steady and and full, I wouldn't worry about it.
Alrighty that's kinda what I figured
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