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Fully developed Colorado/Canyon tuning options
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Discussion Starter · #2 ·
Broadening the torque curve helps the passing performance and general feel of the vehicle during accelerations. The turbo is a bit limited above 3300rpm. An aftermarket single turbo would be a good addition to this platform.
 

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Is this measured power at the wheel for both stock and your tune? What kind of correction are we looking at?
 

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Fully developed Colorado/Canyon tuning options
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Discussion Starter · #4 ·
Is this measured power at the wheel for both stock and your tune? What kind of correction are we looking at?
Both stock and tuned data is measured at the wheels. We use standard SAE for power/torque calculations. Add 10% to this data if you want to compare to dynojet data. Dynojet adds a 10% fudge factor in their dynos to make people feel good.
 

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Man, an extra 50-75 ft-labs right at my typical towing RPM!
I like that a lot. Only have 20,000 km on my truck.
I understand my warranty would be void, but I have a few questions for GDE:

1) Does the tune shut off or limit EGR operation?
2) What happens to the life of the DPF?
3) Is DEF usage changed? If DEF shut off, do we drain DEF tank to prevent crystallization?
4) Are exhaust system changes/deletion required?
5) How are tire size changes handled? User adjustable?
6) Do all emission system fault activations remain active? Is the tune a cure for a troublesome emissions system?
Most, if not all dealerships will refuse to re-sell a chipped or deleted truck per gov.t regulation.
7) Can all effects of the tune with respect to emissions control system be reversed for later resale?
What would this take after 200-300.000 km?

Not sure if I want to program right now as I have n o current emission issues, but if they become problematic....
 

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Fully developed Colorado/Canyon tuning options
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Discussion Starter · #8 ·
Man, an extra 50-75 ft-labs right at my typical towing RPM!
I like that a lot. Only have 20,000 km on my truck.
I understand my warranty would be void, but I have a few questions for GDE:

1) Does the tune shut off or limit EGR operation?
2) What happens to the life of the DPF?
3) Is DEF usage changed? If DEF shut off, do we drain DEF tank to prevent crystallization?
4) Are exhaust system changes/deletion required?
5) How are tire size changes handled? User adjustable?
6) Do all emission system fault activations remain active? Is the tune a cure for a troublesome emissions system?
Most, if not all dealerships will refuse to re-sell a chipped or deleted truck per gov.t regulation.
7) Can all effects of the tune with respect to emissions control system be reversed for later resale?
What would this take after 200-300.000 km?

Not sure if I want to program right now as I have n o current emission issues, but if they become problematic....
1. No more soot will enter the intake manifold..ever.
2. DPF regens are cut in half or more depending on driving habits and the lifespan should increase as the engine is generating less soot.
3. DEF usage is zero, just keep a couple gallons in the tank to make the level sensor happy. Add a gallon each year. If reverting back to stock, drain the DEF tank and reinstall with fresh DEF.
4. No need to touch any mechanical parts on the vehicle. If you select the 'off-road' option, then you will need a straight pipe.
5. Tire size adjust is $25 per tune, we have to do that in the calibration and not user adjustable.
6. We feel it makes the emission system more reliable for long term usage due to a much cleaner running engine. The soot loading in the engine oil is reduced by 75%, this is very good for bearing life and other rotating hardware.
7. Yes, just flash the stock tune back in...takes 5 minutes.

The tune pays for itself in fuel economy benefits after about 40,000 miles. During that payback period you also get more performance, better response and a much cleaner running engine.
 

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Zero DEF usage? Does this mean your tune eliminates NOx emissions or that you dont care if you emit NOx?
At the risk of speaking for someone who doesn’t want to be spoken for, I’ll speak to this.

Egr delete or block offs have been popular for years because we all know that Egr is terrible for the health and efficiency of your motor. It soots up your intake and will eventually block it off completely.

You can tune out the Egr by keeping it closed all the time. It shuts with enough force to remain closed and let zero soot into the intake. By keeping it plugged in, they are able to let it go through its full open/close cycle each ingnition cycle just so it remains operable and doesn’t get “stuck” so you can still go back to stock.

Egr works in conjunction with Def to mitigate nox. If you close the egr without disabling the def system then you would use tons of def since it would be working solo trying to deal with nox (assuming your tuck wouldn’t throw a code first) so they have to be disabled together.
 

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Fully developed Colorado/Canyon tuning options
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Discussion Starter · #11 ·
The tune is designed for maximum fuel economy so less fuel is used. A 15% reduction in fuel means lower ownership cost and less oil that needs to be pumped out of the ground. Overall emissions should be reduced about the same percentage. The tune is sold for 'off-road racing use only' and has not been emission tested.
 

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The tune is designed for maximum fuel economy so less fuel is used. A 15% reduction in fuel means lower ownership cost and less oil that needs to be pumped out of the ground. Overall emissions should be reduced about the same percentage. The tune is sold for 'off-road racing use only' and has not been emission tested.
The "off-road" version, yes, that makes sense. But what I understood from the above discussion was that your tune which is not the "off-road" version uses zero DEF. So again, does this mean the tune eliminates NOx or that NOx emissions are disregarded?
 

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The "off-road" version, yes, that makes sense. But what I understood from the above discussion was that your tune which is not the "off-road" version uses zero DEF. So again, does this mean the tune eliminates NOx or that NOx emissions are disregarded?
May I suggest emailing them? They’ve given me prompt, thorough replies each time I have emailed them questions (quite a lot, actually) they should be able to clear up anything that wasn’t clear in this thread
 

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May I suggest emailing them? They’ve given me prompt, thorough replies each time I have emailed them questions (quite a lot, actually) they should be able to clear up anything that wasn’t clear in this thread
Is it not OK to ask them questions here? They are a site sponsor, are they not?
 

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Is it not OK to ask them questions here? They are a site sponsor, are they not?
Let me clear it up for you. You’re acting very dense and I know you aren't. First off, I think you already know the answer to your question. Second, No, it may not be appropriate for them to answer all questions here that is why I suggested email.
 

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Let me clear it up for you. You’re acting very dense and I know you aren't. First off, I think you already know the answer to your question. Second, No, it may not be appropriate for them to answer all questions here that is why I suggested email.
It's a legitimate question, especially when statements like these are made back to back:

Overall emissions should be reduced about the same percentage. The tune is sold for 'off-road racing use only' and has not been emission tested.
Are we talking about the "Hot Tune" or the "Hot Tune with Off-Road Option?" And have they looked at emissions or have they not? And what does "overall emissions" mean? Is that a combination of particulate matter and NOx? Something else?

If all else is equal, then yes, eliminating the combustion temperature reducing effect that EGR has will increase NOx emissions and make the SCR system work harder. But is all else equal? Or are they doing something else with the tune to reduce combustion temperature without EGR and thus reduce NOx without urea injection?

They haven't declined to answer any of my questions, yet... maybe they don't work on the weekends and that's why there's no further response. Regardless, why try to stifle the conversation? Maybe someone else would have the same questions that I do or would never think to ask the question but would still be interested in what's actually going on with the tune?
 

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@18Z71Minimax
Sorry for leaning toward the side of protecting the vendor. I’m not a customer of theirs (yet) but they’ve earned my trust through communication.

I know the answers to your questions and haven’t answered them directly. I’ve researched independently and also asked them a lot of questions through email. Their website is a bit vague and that may be on purpose. Feel free to pm me if you don’t want to email the vendor
 

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@18Z71Minimax
Sorry for leaning toward the side of protecting the vendor. I’m not a customer of theirs (yet) but they’ve earned my trust through communication.
Protecting them? From what?
I know the answers to your questions and haven’t answered them directly. I’ve researched independently and also asked them a lot of questions through email. Their website is a bit vague and that may be on purpose. Feel free to pm me if you don’t want to email the vendor
 

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Doesn't look my reply made it in there for some reason. But protect them from what? It's a really simple question... Are they trading NOx for soot, or are they doing something special with fuel or boost management to keep temps down and emit less NOx? They do a lot more testing and use more sophisticated equipment to test their tunes than anyone else I know of, so I'm not sure why this is such an inappropriate question.

I think you're making too big a deal out of this, especially in not even allowing them the opportunity to respond before this has blown up into what it is. If they tell me to email them, I'll email them. If they answer it here for everyone to see, all the better.
 

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Fully developed Colorado/Canyon tuning options
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Discussion Starter · #20 ·
We have not emission tested the HOT tune or 'off-road' option and do not know the breakdown between HC, CO, NOx, PM and CO2. A full barrage of emission testing is about $85,000 and way out of our budget at this time. We will be doing some emission testing with the HOT tune in the coming months for a CARB EO, but these are only the FTP75 and not the 5-cycle weighted average.

We we say overall emissions it includes (HC, CO, CO2, NOx, and PM) on a gram/mile basis. Generally speaking, NOx is very low when compared to CO2.
 
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