EGT for MN 2.5 ?

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Re: EGT for MN 2.5 ?

Postby jock71 on Wed Sep 14, 2011 10:56 am

Well, found the problem the gauge was faulty, there you go never trust new equipment whole heartily, now getting readings of 320degree at 110kph, much happier and relieved now. Thanks to all who chipped in with advice and comment Cheers Jock
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EGT for MN 2.5 ?

Postby mattz on Wed Sep 14, 2011 12:07 pm

Good to see it was the gauge and not anything major.
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Re: EGT for MN 2.5 ?

Postby coxy47 on Wed Sep 14, 2011 12:17 pm

Good to hear that was the case.
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Re: EGT for MN 2.5 ?

Postby Longranger1 on Sun Oct 09, 2011 10:33 am

Quick update on this. My MN runs at between 375 - 425 C at 110km/h in 35 degree heat with a reasonable load and a/c on.

On a long, hard uphill climb in 4th full throttle the highest I've seen while towing 2 tonnes is 510 degrees C.

At idle it will drop back to 175 C and at 60km/h wont exceed 275-300 C.

Measured at the dump pipe a couple of inches from the turbo outlet.
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Re: EGT for MN 2.5 ?

Postby gauci204 on Tue Oct 11, 2011 6:24 pm

have you run it down a quarter mile with the wild tune yet tony?
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Re: EGT for MN 2.5 ?

Postby Newguy on Sat Apr 28, 2012 12:34 pm

gauci204 wrote:have you run it down a quarter mile with the wild tune yet tony?


35 PSI? Shit
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Re: EGT for MN 2.5 ?

Postby fraz91 on Sat Apr 28, 2012 4:17 pm

Longranger1 wrote:Quick update on this. My MN runs at between 375 - 425 C at 110km/h in 35 degree heat with a reasonable load and a/c on.

On a long, hard uphill climb in 4th full throttle the highest I've seen while towing 2 tonnes is 510 degrees C.

At idle it will drop back to 175 C and at 60km/h wont exceed 275-300 C.

Measured at the dump pipe a couple of inches from the turbo outlet.


Was that pre- or post-exhaust LR?

Reason I ask is, the last time I was fully loaded and towing a 1.5T box trailer, my EGT's were getting up around the 600-650deg mark (677 highest recorded) on a big uphill. The Chip-It did it's thing and dropped the tune as soon as it hit 650, but it's not fun watching the EGT's climb without being able to really do anything (was already in 4th at full throttle, full boost).

Has anyone actually done comparison readings between the standard and aftermarket exhaust to see just how much of a cooling effect there is? I know it goes without saying that a larger exhaust means faster flow and therefore quicker heat dissipation, but confirmed readings would be helpful to know just how much of a difference it makes.

See the build up of my old Triton here.
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Re: EGT for MN 2.5 ?

Postby Longranger1 on Sat Apr 28, 2012 6:07 pm

fraz91 wrote:
Longranger1 wrote:Quick update on this. My MN runs at between 375 - 425 C at 110km/h in 35 degree heat with a reasonable load and a/c on.

On a long, hard uphill climb in 4th full throttle the highest I've seen while towing 2 tonnes is 510 degrees C.

At idle it will drop back to 175 C and at 60km/h wont exceed 275-300 C.

Measured at the dump pipe a couple of inches from the turbo outlet.


Was that pre- or post-exhaust LR?

Reason I ask is, the last time I was fully loaded and towing a 1.5T box trailer, my EGT's were getting up around the 600-650deg mark (677 highest recorded) on a big uphill. The Chip-It did it's thing and dropped the tune as soon as it hit 650, but it's not fun watching the EGT's climb without being able to really do anything (was already in 4th at full throttle, full boost).

Has anyone actually done comparison readings between the standard and aftermarket exhaust to see just how much of a cooling effect there is? I know it goes without saying that a larger exhaust means faster flow and therefore quicker heat dissipation, but confirmed readings would be helpful to know just how much of a difference it makes.



I run a 2-3/4" S/S Beaudesert exhaust Fraz. Thermocouple probe is a couple of inches from the turbo outlet (as above).

A bigger diameter exhaust will drop EGT's no question.
The voices in my head may not be real, but they do have some damned good ideas.

If it's feral, it's in peril.

MN turbo lag? What lag??

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Re: EGT for MN 2.5 ?

Postby fraz91 on Sat Apr 28, 2012 6:50 pm

Longranger1 wrote:
fraz91 wrote:
Longranger1 wrote:Quick update on this. My MN runs at between 375 - 425 C at 110km/h in 35 degree heat with a reasonable load and a/c on.

On a long, hard uphill climb in 4th full throttle the highest I've seen while towing 2 tonnes is 510 degrees C.

At idle it will drop back to 175 C and at 60km/h wont exceed 275-300 C.

Measured at the dump pipe a couple of inches from the turbo outlet.


Was that pre- or post-exhaust LR?



I run a 2-3/4" S/S Beaudesert exhaust Fraz. Thermocouple probe is a couple of inches from the turbo outlet (as above).

A bigger diameter exhaust will drop EGT's no question.


Was referring more to the beaudesert exhaust fitment with the "pre- or post-exhaust" part. I get that the larger exhaust will drop the temps, just trying to decide whether to go 2.5", 2.75" or full 3" really.

See the build up of my old Triton here.
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Re: EGT for MN 2.5 ?

Postby Longranger1 on Sat Apr 28, 2012 7:16 pm

My bad :oops:

I didn't have the pyro on the old system so no comparison available. Your egt's seem a good bit higher than mine though.

Very happy with the system I'm running, though if you are going to push to the max maybe a 3" system may be the go. I don't think there would be much in it.
The voices in my head may not be real, but they do have some damned good ideas.

If it's feral, it's in peril.

MN turbo lag? What lag??

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Re: EGT for MN 2.5 ?

Postby Mattstruck on Sat Apr 28, 2012 8:32 pm

Jock was it a calibration issue with the gauge? Was it the Thermocouple? Was it an issue with a faulty gauge?

I have same gauge and getting high readings too. :roll:
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Re: EGT for MN 2.5 ?

Postby Jrosey on Tue May 08, 2012 6:54 pm

Hey Tony. Not sure if you can assist but I have EGT sensor and when traveling at 110klms on freeway it easily runs to 625degrees so I backed the set point back to 575 to kill Chip and restart at 500 degrees. As you can guess this cuts in and out which is a pain in the ar...... I have a tune 5 loaded which is direct from the installer. Should I drop back to drop temperatures. Thanks for any advice
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Re: EGT for MN 2.5 ?

Postby Tony on Tue May 08, 2012 7:24 pm

Jrosey wrote:Hey Tony. Not sure if you can assist but I have EGT sensor and when traveling at 110klms on freeway it easily runs to 625degrees so I backed the set point back to 575 to kill Chip and restart at 500 degrees. As you can guess this cuts in and out which is a pain in the ar...... I have a tune 5 loaded which is direct from the installer. Should I drop back to drop temperatures. Thanks for any advice


Hi Jrosey, can you tell me what temps your seeing under the same conditions with the chip either removed or if set in factory tune? Also, do you have an EGR blank fitted?
Do you have a boost gauge of some sort?

Yes, drop a tune till we sort it.

T
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Re: EGT for MN 2.5 ?

Postby Newguy on Thu May 17, 2012 7:13 pm

Tony have you had time to capture a Video?
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Re: EGT for MN 2.5 ?

Postby dan_4818 on Tue Jun 19, 2012 11:04 am

My mn sits on about 490-530 at 110kmh. Hopefully this is normal
Chip it chip
Uni filter
3" exhaust
Egr blank with hole
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Re: EGT for MN 2.5 ?

Postby Kegsy on Tue Jun 19, 2012 11:20 am

Im sitting on around 350ish at 110kmh.

Tune 8 at the moment.
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Re: EGT for MN 2.5 ?

Postby dan_4818 on Tue Jun 19, 2012 2:24 pm

Yea im running tune 8 aswell. Hmm something is amis then.
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Re: EGT for MN 2.5 ?

Postby Kegsy on Tue Jun 19, 2012 2:51 pm

Here's mine on the way home today.

Chip It. Tune 8.
2.75inch turbo back Beaudesert exhaust
Uni-filter and snorkel.
Throttle Body Bypass (not sure if it will effect EGT's at cruise???)
5 speed Manual.
110km/h on cruise, 354 degrees, about 9psi of boost.
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Last edited by Kegsy on Tue Jun 19, 2012 6:46 pm, edited 1 time in total.
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Re: EGT for MN 2.5 ?

Postby Longranger1 on Tue Jun 19, 2012 3:52 pm

I'm running similar temp's to Kegsy around 325 to 350 C at 100-110 km/h.
The voices in my head may not be real, but they do have some damned good ideas.

If it's feral, it's in peril.

MN turbo lag? What lag??

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Re: EGT for MN 2.5 ?

Postby Tony on Tue Jun 19, 2012 5:23 pm

dan_4818 wrote:Yea im running tune 8 aswell. Hmm something is amis then.


They can get warm under light loads, around 420ish, but should not be up around 500c. It’s safe enough, but not necessary in my opinion..... Lack of air flow, lack of boost or perhaps the EGT probe is telling porkypies.

To see 500c or more under light load could mean the air fuel ratio is way out. The timing retarding contributes to the issue as well. ( Lowers combustion temps but raises the EGTs believe it or not.)

Have you got the map loom in? Just make sure its making proper connection at the MAP sensor end. Also, does it cool down to high 300’s to low 400’s when you boot it.?
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Re: EGT for MN 2.5 ?

Postby dan_4818 on Tue Jun 19, 2012 5:33 pm

ill have a check some time tomorrow and let u know. ive seen it go up to 650 when i have booted it before so i took my foot off to let it cool down
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EGT for MN 2.5 ?

Postby joelzo on Tue Jun 19, 2012 7:53 pm

Im slightly worried mine could be faulty as i rarely go ABOVE 300? Cruising on freeway speeds averages 280ish.

Could this be due to no cat?

MN auto
3" zorst
Tune 13
hmmm 255 character limit hey...
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Re: EGT for MN 2.5 ?

Postby hvac guy on Tue Jun 19, 2012 8:07 pm

You might be able to get a reading in the morning from your guage and check it with the outside air temp for a rough reference to see if your egt temp is out,+-10 deg would be normal when the motor hasn't been started yet.
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Re: EGT for MN 2.5 ?

Postby Tony on Tue Jun 19, 2012 8:45 pm

joelzo wrote:Im slightly worried mine could be faulty as i rarely go ABOVE 300? Cruising on freeway speeds averages 280ish.

Could this be due to no cat?

MN auto
3" zorst
Tune 13


The 3"exhaust with no cat makes a huge difference. 8-) I now run about custom tune 25 compared to the tune 13 you have and never see over 510 under full load. It cruises at around the 280 to 320 mark touching the odd 420 on slight hills as the boost tucks back till she loads up.



Cant say that for my clutch thou. :oops: :lol:
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Re: EGT for MN 2.5 ?

Postby Mattstruck on Tue Jun 19, 2012 9:30 pm

Mine runs into the 800's with the camper on the back and full right boot. :shock:

All tests appear to indicate the Thermocouple and controller are fairly accurate.

Dont know what else to do! Im over it :roll:
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