3rd Gen High Performance and Accessories (5.9L Only) Talk about Dodge/Cummins aftermarket products for third generation trucks here. Can include high-performance mods, or general accessories. THIS IS FOR THE 5.9L ONLY!

Rail Pressure Gauge

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Old Apr 24, 2007 | 04:52 PM
  #31  
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From: NOTHEAST OHIO
zilla, if u do this how long till it would be available?
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Old Apr 24, 2007 | 05:40 PM
  #32  
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It could feasibly happen pretty quickly if deemed worthwhile.
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Old Apr 24, 2007 | 06:38 PM
  #33  
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I think there are several on here that would be interested in something a little more economical than the other options. i know I'm making lots of smoke up top and I'm wondering if my rail is going dry. Also I wonder just how much pressure my Hot Juice adds.
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Old Apr 24, 2007 | 06:39 PM
  #34  
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i will hold out a while than. Just keep us posted, thanx
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Old Apr 24, 2007 | 09:22 PM
  #35  
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i deem it worthwhile, so get started!!!!
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Old Apr 24, 2007 | 09:30 PM
  #36  
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Originally Posted by qzilla
How would you guys feel about a very inexpenisve but, nice rail pressure only gauge?

Or would it be better to have a gauge that read rail and lift pump pressure?
qzilla,

Put me on the order list for lift pressure and rail. I think that sounds fantastic and it would be awesome to have both in one monitor........assuming you would do that!!!!

I have been reluctant also to order a Dipricol because they seem to be so fussy, and definately NOT reliable. There is nothing worse than trying to figure out if the gauge is bad or if it is just in your head.
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Old Apr 24, 2007 | 11:07 PM
  #37  
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If I do this I would probably need to use the Recon platform. Any problems with that?

http://www.quadzillapower.com/products/recon.html
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Old Apr 24, 2007 | 11:24 PM
  #38  
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NO problem with that, I like it!!





Would you be able to view both RP and LP at the same time?
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Old Apr 24, 2007 | 11:52 PM
  #39  
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You would not be able to view both at the same time if I use that platform. It is just sort of handy and already made!

What you could do though is say watch rail pressure and set the fuel pressure warning so it popped up if it reached your preset limit??

It also has a min/max recall if you wanted to make a pull or a pass and then check it?

I was sort of thinking out loud but, I may just do it and see what happens. it seems like a cost effective solution would be viable.

I would think it would be a rail pressure only gauge that you could buy the fuel pressure sending unit for, sort of like we do not but, it would be cheaper as the wiring and other supporting hardware are not needed.

Let me see what I can come up with.
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Old Apr 25, 2007 | 12:01 AM
  #40  
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I am using the Bully dog outlook monitor. Unless I do not understand the thread, I can read the rail pressure with this monitor.
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Old Apr 25, 2007 | 01:33 AM
  #41  
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Yes, you sort of can read rail pressure.

See the Outlook connects to the OBD2 port which is EPA mandated for various reasons. All ECU's send data via this dat bus for the purposes of testing and troubleshooting various problems that may happen on your truck. Same sort of thing as why we can retrieve fault codes from the ECU.

Now, with that said information on these data buses can be very, very fast but, in the case of OBD2 the standard is very, very slow.

For a typical gauge we are going to sample a parameter maybe 10-20 times or up to as fast as 100 times per second. This allows us to filter data as well as provide very fast real time data. On the obd2 bus you must send a request then you must recieve the data packet, then you must extract and convert the data into something that is readable. At the very fastest this might happen once or twice per second but, more like once every couple of seconds or slower.

Now with that said the other problem is that if you go tinkering with your rail pressure or map signal or various other items the readings on the obd2 port will flat out be wrong due to the fact that these signals are being manipulated.

Now, if you run a downloader you stand a better chance of recieving more accurate info but, not always. Depending on how the tuning is done they can also cause the OBD2 data to be misinterpreted. The only people that will know the truth are those that tune it and that info will not be readily available.

The bottom line is that the OBD2 port is awesome for all of us. It can provide a wide array of information that is very useful, it is just not meant to be used for a gauge. Things like coolant temperature, battery voltage, transmission temperature, or other non-critical slow moving parameters would be fine for a gauge but, boost, rail pressure, fuel pressure, oil pressure or anything that is mission critical and moving very fast is useless on the obd port unless you are simply troubleshooting.

Hope that helps.
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Old Apr 25, 2007 | 07:01 AM
  #42  
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Quad, I think you should definately do rail pressure with the Recon. I'd buy one today if you had it available. Why the heck didn't you bring this up sooner?
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Old Apr 25, 2007 | 07:19 AM
  #43  
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That would work for me.
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Old Apr 25, 2007 | 08:42 AM
  #44  
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From: NOTHEAST OHIO
since i started this thread does it mean i get a free one? have to atleast try
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Old Apr 25, 2007 | 09:59 AM
  #45  
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QZILLA,

That would be fine if you can only read one pressure at a time, as long as it hace a recall to fall back on. I like the digital readout and that platform.


Start putting them together and as already posted get me on the list for one.

As you have seen before this will NOT be for everyone.......................but it is for me.
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