ATTENTION: All Quad Recon Users - Dodge Diesel

JPR Ram · 06-22-2007, 07:21 PM

Does the EGT number jump around on you? Mine seems to jump anywhere within a 10 maybe 20 degree window. I could see such fluctuations while on the skinny peddle, but I was sitting in stop and go traffic. Any ideas?

BigBlue · 06-22-2007, 07:38 PM

For a digital gauge I wouldn't say that 10-20 degrees is abnormal. Probably just the load on the engine changing from the AC compressor cycling.

qzilla · 06-22-2007, 09:18 PM

10 degrees could be the different cylinders firing. That is nothing. On an analog gauge they just cannot react fast enough to show you that and they are usually scaled in 25deg increments at the smallest.

Tsutter · 06-23-2007, 01:33 PM

I had the same problem when I had the quad Commander. I dont feel it is that accurate. Remember all that coolant & cast iron is 1 big heat sink, so the reading should be pretty steady. I compared the Commander readings against calibrated test equipment & found the reading to be off by quite a bit.
I have the Edge Juice with Attitude now & mine does not Fluctuate.

Nor_Cal_Angler · 06-23-2007, 01:45 PM

i have the commander and my egts are very steady...no real flux...they rise fast when on the go...and drop fast when not....the commander keeps up with it..i had an anolog put on to test the accuracy and both were steady climbs and then drops when at idle...dont see a problem with the commander YET.

NCA

qzilla · 06-23-2007, 05:21 PM

You have got to be joking that you think that with different cylinders firing that you think egts should be rock steady. Why do you think on true race cars/race trucks they have 1 egt probe per cylinder??

Tsutter,

You do not have any test equipment to test accuracy of EGT's I assure you. The cast iron parts never touch the actual thermocouple and if you think that they fitting has any bearing on the temp then you do not understand how a thermocouple works. There is a reason a the tip gets put down into the exhaust stream and does not just touch the manifold.

Tsutter · 06-24-2007, 09:19 AM

Quote:

Originally Posted by qzilla

You have got to be joking that you think that with different cylinders firing that you think egts should be rock steady. Why do you think on true race cars/race trucks they have 1 egt probe per cylinder??

So they can tell if one cyclinder is different than the others!!!

Tsutter,

You do not have any test equipment to test accuracy of EGT's I assure you. The cast iron parts never touch the actual thermocouple and if you think that they fitting has any bearing on the temp then you do not understand how a thermocouple works. There is a reason a the tip gets put

down into the exhaust stream and does not just touch the manifold.

Wrong again Quad!!

I have a Fluke 714 Temperature Calibrator. Just back from its yearly calibration. You know NIST Traceable. A very accurate device.

Oh yea I forgot my wife worked for JMS southeast. One of the largest thermocouple manufactures. She was a Quallity Control Engineer. I am a Biomedical Engineer. We have talked thermocouples a time or two!!!

qzilla · 06-24-2007, 11:22 AM

It obvious as you think the manifold works as a heat sink.

If your wife worked at JMS you should know that the cast iron manifold has no affect on any thermocouple. You should also be smart enough to know that 10 deg on an engine (especially when reading 3 different cylinders) is a very tiny difference.

The funniest thing to me is your a Bio-engineer and you act like you are an electrical engineer.

That is pretty funny. Oh yeah I guess anyone with a Fluke is an engineer!

Tsutter · 06-25-2007, 10:13 AM

Quote:

Originally Posted by qzilla

It obvious as you think the manifold works as a heat sink.

If your wife worked at JMS you should know that the cast iron manifold has no affect on any thermocouple. You should also be smart enough to know that 10 deg on an engine (especially when reading 3 different cylinders) is a very tiny difference.

The funniest thing to me is your a Bio-engineer and you act like you are an electrical engineer.

That is pretty funny. Oh yeah I guess anyone with a Fluke is an engineer!

All I know about Fluke is they are the leader in electrical test Equipment, I do not work for them. Never said I did, & Yes I do have a BS in Electrical Engingeering. Its Biomedical Engineer not Bio-engineer. Yes the cast iron manifold woild have some effect on the thermocouple.

Lary Ellis (Top) · 06-25-2007, 10:18 AM

You guys take your personal stuff to PM as it doesn't belong on the forum.

06-23-2007, 01:33 PM	#4
Tsutter Registered User Join Date: Aug 2005 Location: West Virginia Posts: 82 My Photo Gallery My Classified Ads	Inaccurate readings I had the same problem when I had the quad Commander. I dont feel it is that accurate. Remember all that coolant & cast iron is 1 big heat sink, so the reading should be pretty steady. I compared the Commander readings against calibrated test equipment & found the reading to be off by quite a bit. I have the Edge Juice with Attitude now & mine does not Fluctuate. __________________ 2000 Dodge 3500 Edge Juice with Attitude (sent the Quadzilla Commander & standard module back way to many problems & poor support) FASS system 4x4 mrbp 4" stainless exhaust, Bull Dog remote start & alarm, Warn 10000 lb winch Warn Transformer mount system, Rhino bed liner, Husky floor mats, Pioneer DEH-P9800BT (love the bluetooth hands free for the cell phone) Garmen QPS

06-23-2007, 01:45 PM	#5
Nor_Cal_Angler Registered User Join Date: Mar 2007 Location: Pittsburg, CA Posts: 410 My Photo Gallery My Classified Ads	i have the commander and my egts are very steady...no real flux...they rise fast when on the go...and drop fast when not....the commander keeps up with it..i had an anolog put on to test the accuracy and both were steady climbs and then drops when at idle...dont see a problem with the commander YET. NCA __________________ 2001.5 24v QC/LB AT AFE, HX35, Edge Comp, Banks High Ram, 100 HP Stage 3 Jammers, 4" Turbo Back SS Silverline Exhaust with 5" TIP, FP, Boost, EGT, AT Temp Guages, Raptor 100, Goerend VB and TD TC Sky Jacker 4.5 Dual Shock with Rear Add-a-Leaf's Toyo Open Country MT 315's and 16" chrome Ultra Peacemakers Pioneer Deck, Infinity components, Infinity Rears, RF Punch 10" Subs, RF 4 Channel and MTX 2 Channel Alarm with Remote Start and Turbo Cool Down

06-25-2007, 10:18 AM	#10
Lary Ellis (Top) DTR Online Store/Admin Join Date: May 2002 Posts: 13,763 My Photo Gallery My Classified Ads	You guys take your personal stuff to PM as it doesn't belong on the forum. __________________ C.O.O. Diesel Truck Resource LLC To start a local chapter of DTR in your area email chapters@dieseltruckresource.com lellis@dieseltruckresource.com DTR Performance Shop Toll Free USA 1-877-375-1956 "We hang the petty thieves and appoint the great ones to public office." - Aesop

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06-22-2007, 07:38 PM	#2
BigBlue Banned Join Date: Feb 2002 Posts: 0 My Photo Gallery My Classified Ads	For a digital gauge I wouldn't say that 10-20 degrees is abnormal. Probably just the load on the engine changing from the AC compressor cycling.

06-22-2007, 09:18 PM	#3
qzilla Registered User Join Date: Jun 2003 Posts: 3,744 My Photo Gallery My Classified Ads	10 degrees could be the different cylinders firing. That is nothing. On an analog gauge they just cannot react fast enough to show you that and they are usually scaled in 25deg increments at the smallest.

06-23-2007, 05:21 PM	#6
qzilla Registered User Join Date: Jun 2003 Posts: 3,744 My Photo Gallery My Classified Ads	You have got to be joking that you think that with different cylinders firing that you think egts should be rock steady. Why do you think on true race cars/race trucks they have 1 egt probe per cylinder?? Tsutter, You do not have any test equipment to test accuracy of EGT's I assure you. The cast iron parts never touch the actual thermocouple and if you think that they fitting has any bearing on the temp then you do not understand how a thermocouple works. There is a reason a the tip gets put down into the exhaust stream and does not just touch the manifold.

06-24-2007, 11:22 AM	#8
qzilla Registered User Join Date: Jun 2003 Posts: 3,744 My Photo Gallery My Classified Ads	It obvious as you think the manifold works as a heat sink. If your wife worked at JMS you should know that the cast iron manifold has no affect on any thermocouple. You should also be smart enough to know that 10 deg on an engine (especially when reading 3 different cylinders) is a very tiny difference. The funniest thing to me is your a Bio-engineer and you act like you are an electrical engineer. That is pretty funny. Oh yeah I guess anyone with a Fluke is an engineer!