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2G Fuel pressure gauge install

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I agree, i believe the fp is 43lbs. I would wait until an adjustable FPR is needed. For example: Bigger injectors, or stronger fuel pump. With bigger injectors you will need to drop fuel pressure so you dont over fuel the combustion chambers.
 
It shouldnt matter if I have an afpr or not. That wasnt my question I was asking for help on specifically what's in my OP. I have the gauge so I want to use it, I have a walbro 190 rewired and 680cc injectors so I'd like to be safe and know the numbers. Thanks
 
you could tap the rail 1/8 NPT or get an aftermarket rail that already has a 1/8 npt tap. better of just getting a cheap 0-5v transducer and logging rather than a gauge though..........way more useful. Its nice to be able to confirm that fuel pressure is rising one to one as you review logs
 
Would I drill and tap right after the fpr or anywhere in the rail is fine?
you could tap the rail 1/8 NPT or get an aftermarket rail that already has a 1/8 npt tap. better of just getting a cheap 0-5v transducer and logging rather than a gauge though..........way more useful. Its nice to be able to confirm that fuel pressure is rising one to one as you review logs
 
You could get a banjo bolt with a 1/8 npt adapter for your fuel filter (located against the fire wall). That will not require any drilling/tapping or modifications. Just remove the bolt and replace with the gauge adapter. Easiest way in my opinion.
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You could get a banjo bolt with a 1/8 npt adapter for your fuel filter (located against the fire wall). That will not require any drilling/tapping or modifications. Just remove the bolt and replace with the gauge adapter. Easiest way in my opinion.
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Ok so maybe I was confused at first. The fuel pressure gauge doesnt have to be on the feed side? It can also be on the return side?
 
Has to be before the regulator. Select the spot you will tap with the rail installed and all components in place to make sure it will not obstruct anything if you choose this method.

These rails are stupid cheap and a dime a dozen so no reason to be scared about tapping........

Ive got about a dozen of these rails so their value to me may not be what it is to others.

That fitting is the way to go if you only have one rail or don't trust your abilities.

Hope youve changed your fuel filter before....... or the fitting may not necessarily be the easier route....as far as "best"........thats just a silly word to use here really. Both methods work great. Choose your path.
 
No. It has to be on the feed side.
Has to be before the regulator. Select the spot you will tap with the rail installed and all components in place to make sure it will not obstruct anything if you choose this method.

These rails are stupid cheap and a dime a dozen so no reason to be scared about tapping........

Ive got about a dozen of these rails so their value to me may not be what it is to others.

That fitting is the way to go if you only have one rail or don't trust your abilities.

Hope youve changed your fuel filter before....... or the fitting may not necessarily be the easier route....as far as "best"........thats just a silly word to use here really. Both methods work great. Choose your path.

Ok so which side is the feed side? Maybe it's a dumb question but from the way I see it the right side looking at the picture would be the feed since it goes through the FPR then into the rail correct? I used a random picture to do a little painting. But if I am able to put a fitting on the fuel filter couldn't I just use my T that I have with the sending unit and put it in the line between the filter/rail?

Yellow - Fuel lines
Red - Stock FPR
Green - Fuel rail
Blue - Filter
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Feed is left. Return goes through fpr unless you’ve changed something.
Ok I just figured it would go through the FPR first without knowing much about it that would seem logical. I haven't changed anything, so in that case my answer is solved. I can just place my T fitting between the filter and rail then screw my sending unit it and then wire up the gauge and call it a day.
 
I would not recommend drilling and tapping the fuel rail. If you mess up you have a potential bad day coming. If you really want to install a gauge so that you can look at it (thats about all you will do running thr stock fpr) then do it at the feed before the rail. If you have a male to male fitting you could place it on the feed with a couple clamps. Again this seems like a lot of work for a gauge without adjustment but not my monkey:idontknow:
 
I would not recommend drilling and tapping the fuel rail. If you mess up you have a potential bad day coming. If you really want to install a gauge so that you can look at it (thats about all you will do running thr stock fpr) then do it at the feed before the rail. If you have a male to male fitting you could place it on the feed with a couple clamps. Again this seems like a lot of work for a gauge without adjustment but not my monkey:idontknow:
Not sure how it is a lot of work? I literally just cut my fuel feed line in half and install my T sending unit barb, it took 5 minutes. Ran all my wiring and got the gauge hooked up.
 
I would not recommend drilling and tapping the fuel rail. If you mess up you have a potential bad day coming. If you really want to install a gauge so that you can look at it (thats about all you will do running thr stock fpr) then do it at the feed before the rail. If you have a male to male fitting you could place it on the feed with a couple clamps. Again this seems like a lot of work for a gauge without adjustment but not my monkey:idontknow:


Yeah.........drilling and tapping is way too much for anyone who doesnt know what they are doing. OP- this option is not for you right now. Keep at it though, youve got lots to learn and you'll have fun if you do.

If you are mechanically weak, or dont have the skills/knowledge, then this option isnt for you either. (not that its hard at all)

There is not one single issue with tapping the rail.

Do you guys really not know how to use a 1/8 NPT tap??? Bummer.
 
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