Which fuel pressure guage???

[musclefixer]

Hello fellow TDR members... .

In the interest of knowing whats going on with my truck, I was wondering what fuel pressure guage was needed to properly monitor the fuel pressure on our fuel injection systems.

I mean what amount of pressure do I need. Should I get the 0-15 psi or 0-150 psi pressure guage? I know this sounds like a knuckleheaded question, but what the heck.

Also, are you guys running the mechanical guages with the isolators or what???

Was going to get an Autometer unit. Please let me know good folks. Thanks to you

Jesse

 

[KatDiesel]

get 0 to 15psi. Will work fine for your needs. It migt be a different story if you modify your fuel system dramatically. But for stock and no fueling (different pump) upgrades then you should be ok.

 

[EMDDIESEL]

I just ordered a kit from www.smokindiesel.com go to there website and get there number and call them. They are setting me up with a 0-15psi Auto Meter Sport Comp and all the nessecary fittings to hook it up to my ISB and braided stainless line. You wont need to buy anything else which is really convienient. I am not using an isolator, but he will offer the kit with it also if you want it.

An isolator is nice to have, but i am not worried about 15psi at the most of diesel fuel dripping in my cab. Ill just shut it down and shut the line off. There is no explosion hazard. Plus, with Braided stainless line, the line is good for 1,000psi usually, so the line will NEVER fail with 15 psi of diesel fuel. and catastophic gauge failure is extremely rare. Auto Meter does make an electric fuel pressure gauge but they are fairly expensive and the severe vibration Diesels put out can cause problems with te senders unless you mount them off the engine with a hose to help dampen them.

 

[CumminsAholic]

I have autometer ultralites. I have a mechanical gauge, no isolator. It was quite a bit cheaper to go without the isolator, so I did. I got 0 to 15 psi. I usually run 11 psi. If you plan on putting on a "pusher pump" you should get a bigger gauge. If you're gonna keep it stock a 0 to 15 will work great. If you want to know more about my gauge give me an e-mail or call Doug at Advanced Diesel Technology. http://smokindiesel.com/index.html That's where I got it. He's been trying a lot of different setups.

Corey

 

[CumminsAholic]

EMD,

So you're the other guy that's running the same set-up as me. Now I know who Doug's talking about.

 

[EMDDIESEL]

Cool, it will be easy to make comparisons then. I ordered the "Pusher pump" kit from Enterprise this week. Smokin said the 15psi gauge would be ok even with that, but i am wondering if it will be pegged the whole time?

 

[jstyer]

Fuel Pressure Guage

I have had both, 0-100 and 0-15. Even if you pegged the 0-15 it is still better than trying to read your pressure on the 0-100 since even 20psi is only a small portion of the guage face and difficult to read and not very accurate at that small size. Go with the 0-15.

Good Luck

I didn't state this in my original reply, but my comments apply to mechanical guages, not electronic. OOPS!

I apparently also have the same guage set-up as EMDDIESEL and CumminsAholic. Mechanical all the way to guage without the isolator.

 

[Steve St.Laurent]

EMDDIESEL - it WILL be pegged all the time, I can guarantee it. I agree with jstyer that the next step up is a 0-100 gauge and it's inaccurate at 20 psi. I do have an option for those that want to run a gauge with the pusher setup though. Through testing I was able to use resistors to lower the value of my senders to display in the range of the scale on my Stewart Warner gauge. The actual number displayed is wrong but I know what it reads - at the top end of the scale it reads 4 psi low and at the bottom end of the scale it reads 2 psi low. I'm seeing 15 psi on the gauge with the engine running (hence 19 psi true) and it goes down to 14 psi at WOT (18 psi true). I'd rather it read accurate but it's the best I've been able to come up with. If you go down to the bottom of this thread - https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=6113&perpage=30&pagenumber=2 - I detail how I did it.

 

[EMDDIESEL]

Thanks Steve, i know its bad to peg any gauge, but i wanted to know how bad it is on a 15psi fuel pressure gauge so i just called Automoter. He said there 0-15psi fuel pressure gauge should never be exposed to more then 18psi MAX. Anything above that and you are risking permanent damage to that gauge and possibly a catastrophic failure. He said you are better off using a 0-35psi boost gauge with an Isolator. OR, without an isolator at your own risk.

Also, they are now offering liquid filled gauges with silver faces and the Lunar series will SUPPOSEDLY be available around Christmas time

 

[cap-n-cray]

0-60 psi?

SLang was working on a deal with Auto Meter for a special 0-60 psi fuel gauge. Here is the tread:



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=20020



I would like to get a gauge that will be there for future BOMBing. I plan for a pusher pump later. I like doing thing just once.



SLang any progress? I would help pay for the screening in a group purchase. (Is this still aloud?)

 

[EMDDIESEL]

I would order a custom gauge too for a group purchase, but is'nt 0-60psi a little high? why not like 0-40psi or even a little less. I cant see us reading more then 25psi even with the pusher pump.

 

[cap-n-cray]

EMDDIESEL the gauge is based on the Auto Meter Z-Series gauge. It would be a relabled #2617 Boost 0-60 psi guage. I think it would be better than the 100 psi fuel gauge.



Would the 0-35 psi gauge be better?

 

[EMDDIESEL]

The only reason i would rather a 0-35psi gauge is it gets kind of annoying having a gauge with a huge sweep yet the needle does not even move halfway. Somebody respond if i am wrong, but what is the HIGHEST fuel pressure we would ever see on the ISB, even with the Pusher Pump? Enterprise says about 20at the most. I cant see anyone ever running more then 35PSI on the ISB. I would think that gauge would be fine then. I have a friend with 0-60psi boost gauge on a stock truck, the needle only moves like a 1/4" of the way. Maybe its just me, but i like having a gauge suited to the application. Unfourtunatley Auto Meter only has 0-15 or 0-100psi Fuel Pressure gauges. There reasoning is 0-15 for Carb equipped vehicles and 0-100 for EFI. I think there should be a middle range gauge but after asking them, they said there is not enough call for one. Maybe we can change that?

 

[johnrv4]

I just finished plumbing my mechanical gauge a couple of nights ago. I'm running a VDO Vision Series 0-30 psi mechanical gauge. I am taking my readings from the bottom of the filter cansiter using one of Ray's tapped banjo bolts (very nice pieces). I have a . 015" restrictor fitting on the banjo bolt (left over airplane part) and I have seen a pressure as high as 16psi when decelerating. The pressure seems to run 14psi at idle and drop to 10psi at full throttle. The rest of the truck is completely stock.

 

[Bigsaint]

Well, you guys have once again answered a question that I was just thinking of tonight, isolator or no isolator. I recently purchased an Autometer FP gauge with the original intent of installing it under the hood, just to moniter pre-filter psi's @ idle. Once I received the gauge and saw how great it looked I no longer wanted it to be hidden. I was thinking about a exterior mount on the hood, but that seems impractical as the only way is to drill a 3/4 hole through same, for a 'neat' install. I also have the -4AN braided line, I can't see how that would fail and I really don't think the Autometer will fail, as my Mallory will never be set above 15 psi's @ idle, so in the cab it goes. Worst case scenerio, the gauge fails and I get sprayed with some ole #2, big deal, shut her down and plug the line for the ride home.



Scott W.

 

[Archive]

Gauges in the cab.........

I would rather see you guys not run the fuel lines into your cabs. I agree on the million to one odds of an "incident" occurring. If something did happen, I know that you BOMBers would stop, identify and correct the problem immediately. However, your spouse, girlfriend, or daughter can't. A fuel leak to them will look just like "water" leaking from under the dash from somewhere. They will keep right on driving. Not Good.



Do it right (and safe) and use an isolator. I didn't want a fourth gauge in the cab, so I use an Idiot light hooked up to a 4 psi. pressure switch. Also, if you race your truck at the drags, you will not clear tech inspection if the fuel line into the driver compartment is discovered.



Stay safe and Have Fun. Jim A.