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> Fuel Pressure Regulator
StratPlayer
post Nov 13 2024, 08:20 PM
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Going to slap one of these into my new motor, I saw where PMB was building a new 2258 and had one of these units installed on the motor.

https://thedubshop.com/universal-fuel-press...or-package-914/
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bkrantz
post Nov 13 2024, 08:29 PM
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That's what I have in my system (from the Dub Shop). No complaints, so it must be working. (IMG:style_emoticons/default/biggrin.gif)

Actually, I do know that it reaches and holds required pressure, based on when I had a manual gauge plumbed into the engine fuel line loop.
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GregAmy
post Nov 13 2024, 08:31 PM
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I use it on my Microsquirt-converted D-Jet. 3-bar solid with my standard D-Jet pump.

Also used it on my Microsquirt-converted Toyota MR2 race car. Solid there, too.
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jim_hoyland
post Nov 15 2024, 12:34 PM
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QUOTE(StratPlayer @ Nov 13 2024, 06:20 PM) *

Going to slap one of these into my new motor, I saw where PMB was building a new 2258 and had one of these units installed on the motor.

https://thedubshop.com/universal-fuel-press...or-package-914/



How did you mount it ? I’m
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StratPlayer
post Nov 15 2024, 04:22 PM
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QUOTE(jim_hoyland @ Nov 15 2024, 11:34 AM) *

QUOTE(StratPlayer @ Nov 13 2024, 06:20 PM) *

Going to slap one of these into my new motor, I saw where PMB was building a new 2258 and had one of these units installed on the motor.

https://thedubshop.com/universal-fuel-press...or-package-914/



How did you mount it ? I’m



It mounts where the old fuel pressure regulator goes install is easy.
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jim_hoyland
post Nov 15 2024, 07:21 PM
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Can it adjust the fuels pressure ?
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bkrantz
post Nov 15 2024, 08:17 PM
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Here's how I mounted mine. First the Dub Shop bracket.


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bkrantz
post Nov 15 2024, 08:19 PM
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And regulator.


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GregAmy
post Nov 16 2024, 08:08 AM
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QUOTE(StratPlayer @ Nov 15 2024, 05:22 PM) *

QUOTE(jim_hoyland @ Nov 15 2024, 11:34 AM) *

How did you mount it ?


It mounts where the old fuel pressure regulator goes install is easy.


Ditto. I just screwed mine into that same flange using its fittings.

QUOTE(jim_hoyland @ Nov 15 2024, 08:21 PM) *

Can it adjust the fuels pressure ?

No, it's fixed at 3 bar. If you're tuning most EFIs at our level then that's a good baseline.

Stock D-Jet fuel pressure is 28; 3 bar is 43.5 psi. You could account for that with a tunable MPS from Tangerine: https://tangerineracing.com/shop/ols/produc...t-mps-diaphragm

Mario also offers a 4 bar: https://thedubshop.com/fuel-pressure-regulator-builder/

Being a standard Bosch regulator, you could possibly find alternatives.
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Vicioso
post Feb 27 2025, 09:22 AM
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When you change from fuel injection to Carbs on a 74 2.0 do you need to change out the fuel pressure regulator?
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Superhawk996
post Feb 27 2025, 09:52 AM
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QUOTE(Vicioso @ Feb 27 2025, 11:22 AM) *

When you change from fuel injection to Carbs on a 74 2.0 do you need to change out the fuel pressure regulator?

You need to change to a low pressure pump.

Regulating a high pressure fuel injection pump down to 2-3 psi for use with carbs isn’t recommended.
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Vicioso
post Feb 27 2025, 10:06 AM
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Thanks for the quick reply I'll order today, when I remove and replace do I need to clamp the fuel line?
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Superhawk996
post Feb 27 2025, 12:29 PM
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Sorry, I Don’t understand the question.
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930cabman
post Feb 27 2025, 12:53 PM
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Being a Weber guy, I would like to see a fuel pressure regulator with a built in gauge.

Currently I am running a cheapie regulator with a cheapie gauge. Engine runs great, but would prefer an all in one regulator/gauge
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friethmiller
post Feb 27 2025, 01:57 PM
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QUOTE(930cabman @ Feb 27 2025, 12:53 PM) *

Being a Weber guy, I would like to see a fuel pressure regulator with a built in gauge.

Currently I am running a cheapie regulator with a cheapie gauge. Engine runs great, but would prefer an all in one regulator/gauge


@930cabman - see @Retroracer s comment in this recent thread:

http://www.914world.com/bbs2/index.php?sho...p=3193899&#

I'm currently adding a return line to my carb setup and want a regulator that can be set to 3psi. Apparently, most return type regulators seem to have a higher pressure range.. like >4. This one is low pressure, has the gauge built-in and increases your engine horse power just by looking at it. (IMG:style_emoticons/default/biggrin.gif)

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slivel
post Feb 27 2025, 03:39 PM
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I'm currently adding a return line to my carb setup and want a regulator that can be set to 3psi. Apparently, most return type regulators seem to have a higher pressure range.. like >4. This one is low pressure, has the gauge built-in and increases your engine horse power just by looking at it. (IMG:style_emoticons/default/biggrin.gif)
[/quote]


I run a Holley bypass regulator model 12-881 adjustable from 4.5 to 9 psi. The bypass regulator is right after the pump and a second Holley regulator model 12-804 adjustable from 1-4 psi at the engine to feed my Webers. My fuel pump is a Holley Blue 14psi.

In order: Tank - Shut off valve - Fuel filter - Fuel pump - Bypass regulator - Regulator - Carbs.

I've had this arrangement for years on track and now street only. Works great!

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neyen14
post Jan 14 2026, 12:41 PM
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With dual Webers what is preferable, one pressure gauge at the regulator, or one before the "T", or two.... after the "T" but before each carb?
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friethmiller
post Jan 14 2026, 01:12 PM
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QUOTE(neyen14 @ Jan 14 2026, 12:41 PM) *

With dual Webers what is preferable, one pressure gauge at the regulator, or one before the "T", or two.... after the "T" but before each carb?

@neyen14 - You've got options and I've seen some diagrams out on the Internet that can probably help you. I went with the PMO regulator. I've installed a return line and have dual Webers. I guess this would be an internal "T" out to the carbs.

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friethmiller
post Jan 14 2026, 01:47 PM
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Here's my post from the other thread. It has the diagrams I mentioned. Also see @Retroracer post with his install photo/comments.

http://www.914world.com/bbs2/index.php?s=&...t&p=3193899
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neyen14
post Jan 14 2026, 04:38 PM
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QUOTE(friethmiller @ Jan 14 2026, 11:47 AM) *

Here's my post from the other thread. It has the diagrams I mentioned. Also see @Retroracer post with his install photo/comments.

http://www.914world.com/bbs2/index.php?s=&...t&p=3193899


Thank you @friethmiller for this. I have a regulator that I'm going to use that doesn't have a return line and will go from there. I'm hoping to get mine started for the first time this week and will make adjustments/upgrades as things show up.

thank you for the rapid response with insightful info!!
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