GDE tune and EGT guage/egts

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

I have been reading all over and seeing how many of you have one of the GDE tunes. But It looks to be uncommon that you have a EGT gauge.

I'm from the diesel truck world, Where if you do anything with any kind of tuning box or re flashes you are considered a serious gambler if you don't run gauges, trans, egt, boost. I could do without a boost gauge and having a tune, but i don't think i would be able to drive and feel comfortable without an EGT. Is this something that GDE recommends using and not many of you do? Or do they just not run hot like the trucks?

One of the main things holding me back from geting a flash other than spending 450.00 for ONE tune, Is the added cost of gauges to go with it.

And for those who have them, where are you installing the pyro?

dieselsmoke · **Posted:** Thu Jun 17, 2010 1:06 pm

mustang_gt_350 wrote:

I have been reading all over and seeing how many of you have one of the GDE tunes. But It looks to be uncommon that you have a EGT gauge.

I'm from the diesel truck world, Where if you do anything with any kind of tuning box or re flashes you are considered a serious gambler if you don't run gauges, trans, egt, boost. I could do without a boost gauge and having a tune, but i don't think i would be able to drive and feel comfortable without an EGT. Is this something that GDE recommends using and not many of you do? Or do they just not run hot like the trucks?

One of the main things holding me back from geting a flash other than spending 450.00 for ONE tune, Is the added cost of gauges to go with it.

And for those who have them, where are you installing the pyro?

We are in the same boat. There are several cheap anolog gauges that will work fine for our CRD's. I have once talked about why you need to remove the cat if you plan to drive it hard and/or tow for long times. Everyone was like why would you do that? haha....Get some higher egts and find out. I guess they dont run hot, or these guys dont think egts arnt important.

I bet you one thing, After i get my hoy tune. a full set of gauges are going in.

linewarbr · **Posted:** Thu Jun 17, 2010 1:42 pm

When the GDE tune first came out, a member here with an EGT guage posted an average decrease of 100 degrees F measured after the turbo. The GDE Tune, unlike many of the fuel-fooler boxes used in juicing up big trucks, adjusts multiple engine parameters to produce better driveability and more power - not just fuel delivery.

If you are concerned about the tune's effect on EGT's, I would encourage you to call Keith at GDE. their phone number is at the bottom of their posts.

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

dieselsmoke wrote:

mustang_gt_350 wrote:

I have been reading all over and seeing how many of you have one of the GDE tunes. But It looks to be uncommon that you have a EGT gauge.

I'm from the diesel truck world, Where if you do anything with any kind of tuning box or re flashes you are considered a serious gambler if you don't run gauges, trans, egt, boost. I could do without a boost gauge and having a tune, but i don't think i would be able to drive and feel comfortable without an EGT. Is this something that GDE recommends using and not many of you do? Or do they just not run hot like the trucks?

One of the main things holding me back from geting a flash other than spending 450.00 for ONE tune, Is the added cost of gauges to go with it.

And for those who have them, where are you installing the pyro?

We are in the same boat. There are several cheap anolog gauges that will work fine for our CRD's. I have once talked about why you need to remove the cat if you plan to drive it hard and/or tow for long times. Everyone was like why would you do that? haha....Get some higher egts and find out. I guess they dont run hot, or these guys dont think egts arnt important.

I bet you one thing, After i get my hoy tune. a full set of gauges are going in.

I most likely won't go with anything other than the eco tune. I bought this jeep for a driver/ commuter for the car pool to work. I'm going to keep it basic, i might not even go for the ECO tune just due to the cost vs mpg of the mod. I'm still unsure on that, the only benefit is with all of the updates that GDE does to the tunes.

Have you looked around for a good place to drill and tap for the pyro? I was thinking about going after the turbo instead of in the ex. manifold, but i hate to do that since i'm not seeing exactly what the engine is seeing for temp.

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

linewarbr wrote:

When the GDE tune first came out, a member here with an EGT guage posted an average decrease of 100 degrees F measured after the turbo. The GDE Tune, unlike many of the fuel-fooler boxes used in juicing up big trucks, adjusts multiple engine parameters to produce better driveability and more power - not just fuel delivery.

If you are concerned about the tune's effect on EGT's, I would encourage you to call Keith at GDE. their phone number is at the bottom of their posts.

I am anti box tuners in the diesel truck world, because of them only fooling certain things and not actually tuning like custom chips do. Its not so much the issue of the EGT's while just driving with the ECO tune i'm more worried about the ones who tow with the tune or have a decent load in the jeep 5ppl and so on. The eco tune on my powerstroke was good (custom tune on a selectable switch) for keeping the temps in range but when pulling a larger hill or towing it had to be watched. Mostly when it was in the lower RPM range, now that might be different and not so much of an issue since these have a VGT.

What i'll probably end up doing is just try to snag a good deal on ebay or around the forums for an EGT gauge/pyro and toss it in stock, then i'll be ready for when i get my tune. Its just the part of me that likes knowing what is going on with my engines. Yup, call me OCD

lol

dieselsmoke · **Posted:** Thu Jun 17, 2010 2:18 pm

mustang_gt_350 wrote:

linewarbr wrote:

When the GDE tune first came out, a member here with an EGT guage posted an average decrease of 100 degrees F measured after the turbo. The GDE Tune, unlike many of the fuel-fooler boxes used in juicing up big trucks, adjusts multiple engine parameters to produce better driveability and more power - not just fuel delivery.

If you are concerned about the tune's effect on EGT's, I would encourage you to call Keith at GDE. their phone number is at the bottom of their posts.

I am anti box tuners in the diesel truck world, because of them only fooling certain things and not actually tuning like custom chips do. Its not so much the issue of the EGT's while just driving with the ECO tune i'm more worried about the ones who tow with the tune or have a decent load in the jeep 5ppl and so on. The eco tune on my powerstroke was good (custom tune on a selectable switch) for keeping the temps in range but when pulling a larger hill or towing it had to be watched. Mostly when it was in the lower RPM range, now that might be different and not so much of an issue since these have a VGT.

What i'll probably end up doing is just try to snag a good deal on ebay or around the forums for an EGT gauge/pyro and toss it in stock, then i'll be ready for when i get my tune. Its just the part of me that likes knowing what is going on with my engines. Yup, call me OCD

lol

I hear ya. Im looking for power most of all. So i will be get'n gauges soon after my hot tune. Either way gauges will never hurt....

linewarbr · **Posted:** Thu Jun 17, 2010 3:11 pm

Personally, an A-Pillar pod with EGT's and Boost is on my to-do list, but not high on it. I still want to change out my cloth seats for leather power seats, and install a new torque converter with shift kit and a tranny tune. The pod I want looks like this:

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

DO you happen to know where that pod came from? I have been kicking around the idea of a shift kit also. Wheres a good place to pick one up? I figure if i'm going to pull the pan to change the filters then why not.

flman · **Posted:** Thu Jun 17, 2010 4:24 pm

My truck has to be near lugging up a hill in high gear to get high EGTs. I doubt you would need a gauge to monitor a CRD unless you are towing and lugging, which is hard to do with an auto tranny, when it downshifts you will have high RPMs and low EGT. The only good use would be towing and cool down?

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

flman wrote:

My truck has to be near lugging up a hill in high gear to get high EGTs. I doubt you would need a gauge to monitor a CRD unless you are towing and lugging, which is hard to do with an auto tranny, when it downshifts you will have high RPMs and low EGT. The only good use would be towing and cool down?

Maybe these are different then. I know with my powerstroke (auto) with the stock turbo, good air filter, 4"downpipe into a 5" exhuast in my hot tune with stock injectors with just a good tune i could easily take it passed 1250 with nothing in or on the truck but myself on a full throttle run to merge into traffic. Thats even turning around 900rpms or so away from redline.

Glend · **Posted:** Thu Jun 17, 2010 7:13 pm

I have run EGT and Boost gauges prior to my GDE ECO tune install and yes EGT temperatures did drop noticably after the ECO tune install (100F would be about right but in some circumstances maybe more). I discussed this with Keith at GDE and it was acknowledged that this was consistent with what they have found. I have peak memory stored on my EGT gauge of close to 1200F but I have not been able to get anywhere near that post-Tune. THe highest reading I have noticed with the Tune is maybe 900F - and I tow a camper trailer.

On the assumption that EGT is a function of fueling - I see this as an indicator that GDE ECO tune is doing its job and saving me money.

GreenDieselEngineering · **Joined:** Sun Jun 07, 2009 5:10 pm **Posts:** 1111

The temperature drop can be explained by a combination of factors. At each load point in the engine operating range the main timing is advanced somewhat, higher levels of boost, tuned pilot injection, and optimized rail pressure all lead to a more efficient combustion event. More energy is transferred to torque and there is less waste heat. The proper burn time and temperature leads to less overall heat rejection.

We have started tuning a duramax LBZ and have noticed the production tune will produce very high exhaust temps when towing. This is a good indicator that tuning will help the application and improve the fuel economy. The nozzle spray geometry can also play a significant role here. A staged turbo set-up would be beneficial as this truck has a massive turbo and its range is limited. Our goal is not to produce massive power at the top end, but just maximize efficiency everywhere.

Ripster · **Posted:** Thu Jun 17, 2010 9:58 pm

Here is my setup:
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=47396

Any kind of coasting brings it right down to around 400. I am post turbo, right
near the flange, dropped the exhaust and did a tap/weld on the pyro. It is clean and very sharp at night, matched the glow within the vehicle.

mustang_gt_350 · **Joined:** Tue Jun 01, 2010 8:47 am **Posts:** 191

GreenDieselEngineering wrote:

The temperature drop can be explained by a combination of factors. At each load point in the engine operating range the main timing is advanced somewhat, higher levels of boost, tuned pilot injection, and optimized rail pressure all lead to a more efficient combustion event. More energy is transferred to torque and there is less waste heat. The proper burn time and temperature leads to less overall heat rejection.

We have started tuning a duramax LBZ and have noticed the production tune will produce very high exhaust temps when towing. This is a good indicator that tuning will help the application and improve the fuel economy. The nozzle spray geometry can also play a significant role here. A staged turbo set-up would be beneficial as this truck has a massive turbo and its range is limited. Our goal is not to produce massive power at the top end, but just maximize efficiency everywhere.

Nice info. What is your opinion on running a trans temp gauge?

And also just out of curiosity about what boost PSI do these engines run stock? and how much more are you runing with your eco tune?

GreenDieselEngineering · **Joined:** Sun Jun 07, 2009 5:10 pm **Posts:** 1111

For boost levels you will need to be specific regarding the rpm and load as virtually every point is changed. At peak power, the boost is not substantially higher as we need to protect for maximum turbo speed limitation.

linewarbr · **Posted:** Fri Jun 18, 2010 3:06 pm

mustang_gt_350 wrote:

DO you happen to know where that pod came from? I have been kicking around the idea of a shift kit also. Wheres a good place to pick one up? I figure if i'm going to pull the pan to change the filters then why not.

I found the pod on www.jeepinbyal.com under "Interior." Not sure if Marlin has them in stock or if he is just a middle man for them, you may want to contact him and find out.

Transgo makes a shift kit for the 45RFE/ 545RFE. I was going to buy mine from www.suncoastconverters.com but ended up buying it from a member here instead. I haven't installed it, so I can't testify to whether it does any good or not.

DOC4444 · **Posted:** Sat Jun 19, 2010 11:20 am

I got my 2 gauge pillar mount, boost, EGT and trans temp gauges from: http://www.gaugepods.com/

They had the lowest prices and their gauges pretty closely match the OEM style. (If you go this way, get the "diesel package". It's cheaper than ordering individually.) The pillar was finished in beige and closely matches the factory colors so it all looks almost OEM. I mounted the trans temp in the lower cubby in front of the shifter. Boost and EGT went in the pillar. I think a 3 gauge piller would be a problem.

However, one guy managed to adapt a small electronic module to work with a CRD. There is a link to this on this thread. If I were to do this again, I would go this way because it involves much less stuff in the interior.

DOC

GDE tune and EGT guage/egts

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