Originally Posted by Uncle Bubba
(Post 362787)
If you use that port down by the VP you will need an isolator or your gonna get some nasty needle bouncin from the pulses.
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Originally Posted by Uncle Bubba
(Post 362787)
If you use that port down by the VP you will need an isolator or your gonna get some nasty needle bouncin from the pulses.
x2. I have the Vulcan 1/2 Line from the Filter to the IP and it has that same fitting in the elbow. I ran a stainless braided line to the firewall and zip tied the sender there without an pressure snubber. The needle bounced horribly and killed my sensor(electric guage) in a matter of weeks. Rather than an isolator you can buy a pressure snubber that has an orfice or a fine screen in it that will dampen the pulses and let your gauge live. Though being mechanical you probably won't have to worry about something breaking. The main reason most people use an isolator on a mechanical gauge is so they can avoid running a fuel line inside the cab. |
Originally Posted by 24v'd_Fury
(Post 362843)
turbo20psi, do you know how to bleed the stupid isolator with antifreeze? My guage kit didnt come with and type of eye dropper thing to fill it. I'm replacing my airdog 90* line to the VP with a tapped one so I'm pretty sure I'll need the isolator.
Thanks find a neighbor kid or something |
Originally Posted by DieselMinded
(Post 362885)
find a neighbor kid or something
I literally almost pissed myself when i read that! ---AutoMerged DoublePost--- Where would on get a needle valve from? I think im going to go in cab, no isolator. I need to figure out how to get the fittings together and what to use to run it in a cab using a needle valve as an isolator. Anyone have any write ups or info? |
McMaster Carr
You could also try your local hardware store. However you want to make sure the one you get will be compatible with diesel fuel. You could also go down to your local auto parts store and ask for a pressure snubber. The disadvantage there is you can't shut the line off if something happens to the gauge or you want to take it off. |
2 Attachment(s)
Heres some pics of installs on a 99 - it uses the front port on the fuel filter canaister. Do you still have the filter canister or is it gone? Yours isnt stock so it will be a bit more of a custom setup.
Attachment 52054 Attachment 52055 Basically the needle valve goes between the sample point and the fuel pressure guage. Start the truck with the needle valve closed all the way and very slowly open the valve up until you get a steady reading (it should be barely cracked). Thats all there is to it. |
Went to put my gauge on and the dang thing doesn't have a connection to fit the actual gauge fitting. Its -4AN and they purposely didn't include any fittings for that because they want you to buy their S.S. kit. LAME! So to get by i moved the little cheapo gauge i got from autozone from on top the filter canister into the cab using the line kit from autozone. Just some compression fittings and nylon line. NO leaks and works great. Because of the small line and the copper screen on the gauge i get NO pulsation! My new LP holds 12psi at idle and 10psi at WOT redline. :rocking:
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I would still put a needle valve in there - for two reasons: 1) the pulses could eventually screw up your guage and more importantly 2) you dont want a fuel leak in the cab.
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Very good point! I will get one from Mcmaster. I just wanted something in ASAP because i want to monitor the Summit brand pump closely!
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You may have caught it in time.
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