Throttle response on 6.2...

Higgs Boson · May 2, 2015

https://www.hptuners.com/help/vcm_editor_tuning_how_to_advanced_e78.htm

This can help get you started with understanding Torque Based logic.

KARNUT · May 2, 2015

I've used caned tunes since 2001 for various reasons, on my 14 I use it mainly to turn off the V4 add max speed a bit just in case and firm the shift a little. I feel the vibration in V4 in my truck and here it in the exhaust, if I had to put up with that the truck would be gone. If there comes a time I have a warranty claim problem over that I'd be done with the brand . I would just drive my old truck and buy a one more old truck and just keep rebuilding them.

Sent from my iPhone using Tapatalk

Isriam · May 2, 2015

If GM calls for the checksums on your ECM/TCM/BCM/CCM due to a powertrain failure they will absolutely not honor your warranty claim. They are not going to check and report every time you get an oil change.

There have been tons of instances of denied claims due to a tune. There have been threads posted with proof of detectability with pictures by GM techs pulling the checksums.

This all started with the diesel guys tuning their trucks to 1000 ft lbs of torque and blowing transmissions and has migrated over into all of their cars. GM has produced literature, owners manuals, TSBs, etc that specifically state a modified calibration will not be eligible for warranty repairs.

We DO know GM will deny a claim based on a tune.

If you modify your car and it fails don't expect the manufacturer to fix it for free. That's pretty stupid!

I'm sorry but you didn't post anything that was proof. You said the dealer can see a CVN checksum? Well Mike says otherwise. He has something to sell, so he could be a liar out to get our money. But I bet if word got out that dealers could see via CVN that the engine with a stock tune had previously had a custom tune he could be in a world of hurt based on these posts.

http://www.gm-trucks.com/forums/topic/158551-2014-engine-transmission-tuning/?p=1385814

There is no flash counter. Its a CVN list. I know all about it, and I have no desire to explain it to you.

#rd parties have tested and verified that it is not detectable by the means GM uses to detect tunes. No customer of ours has EVER had a warranty issue due to using one of our tuners.

http://www.gm-trucks.com/forums/topic/158551-2014-engine-transmission-tuning/page-32?do=findComment&comment=1528287

Also, since you seem to know all about me, I am not a sales person. I don't get paid any differently if you buy our product or not. What I am paid to do, is to make sure our customers get answers to their questions, and if the question is will the dealer be able to see the tune, the answer is no. And until you drag a GM engineer or someone intimately familiar with the CVN system into this conversation, I am the only one here who can truly answer the question. If you do find that person, i will gladly explain to them what we do, and they'll kindly tell you, that you were very wrong about it not being possible.

Higgs Boson · May 2, 2015

If we are talking specifically about the Diablo handheld tuner, yes, they claim to not trip the counter and there have been third parties that claim this is true. I don't know anything more with regard to their product. I use HPTuners to create custom in-person tunes and trip the counter every time.

With that said, someone who uses a handheld tuner is more than likely not that modified (intake, exhaust...basic bolt ons). These parts more than likely aren't going to cause a powertrain failure so reversing to stock should be quick and painless if needed. I do not however, condone getting the manuf to pay for your own mistakes if the cause of failure is your own, that's all I am saying.

Isriam · May 3, 2015

If we are talking specifically about the Diablo handheld tuner, yes, they claim to not trip the counter and there have been third parties that claim this is true. I don't know anything more with regard to their product. I use HPTuners to create custom in-person tunes and trip the counter every time.

With that said, someone who uses a handheld tuner is more than likely not that modified (intake, exhaust...basic bolt ons). These parts more than likely aren't going to cause a powertrain failure so reversing to stock should be quick and painless if needed. I do not however, condone getting the manuf to pay for your own mistakes if the cause of failure is your own, that's all I am saying.

Now that is an interesting take, because other than what Mike has said, everyone on this forum believes handheld tuners like bullydog or diablosport actually trip the counter even when reverted to stock tune.

Higgs Boson · May 3, 2015

regardless of the brand of tuner, if it trips the counter, it doesn't matter what tune you are flashing. there's nothing special about the stock tune that would make it not count. it's still a tune, it's just the one gm wrote. the handheld you are using doesn't trip the counter then it just doesn't......

Isriam · May 3, 2015

Thats very interesting. I wish more was posted on this. If certain handhelds can bypass the CVN then it should be possible to add that to HPTuners or other custom tunes.

Higgs Boson · May 3, 2015

Thats very interesting. I wish more was posted on this. If certain handhelds can bypass the CVN then it should be possible to add that to HPTuners or other custom tunes.

Yes, I don't know enough about the actual flash/upload process to comment further on that. I can say that there doesn't seem to be any indication of plans to change but I am sure that is a behind the scenes programming goal, rather than tuning talk, for companies that decode the computers and write the actual tuning software.

I do think that one can get a better quality tune and is able to touch/configure way more aspects of a tune and tune for much more extensive mods (you get a cam, headers, ported intake, supercharger on meth and a shot of nitrous or something past CAI/headers, you aren't going to use a handheld) with HPTuners or the like.

At this point, as long as someone doesn't come out showing checksum issues with Diablo handhelds, I would have to say that undetectability is an advantage to them. HPTuners gets the nod for versatility and customization rather than just being a "canned tune."

HPTuners is a custom home cooked meal you can't get anywhere else. The handheld is like eating at McDonalds. You are limiting your taste buds and the food is identical anywhere you get it and it's generally cheaper but it's not as good for you and you get less out of it.

Just, IMO....

mdrew · May 3, 2015

I have been using HPT for several years, as well as EFI Live. HPT is simpler to use, that's for sure. I have the HPT custom OS in my vette right now.

I have not checked to see if the 2015/6.2/8 speed cal is supported yet. Is it Higgs? Not sure if I want to take the chance of voiding the warranty on my new truck, but damn..... This tranny is friggin lazy. Get's after it if I hammer the go peddle, but crap, it just seams like it take way too much effort.

Higgs Boson · May 4, 2015

Not quite yet. You can edit shift points (mph and rpm) but no pressures or torque management. It looks like they have gotten started on some of it but there's a long way to go. Interestingly, the trans diag section is full of codes like the engine diag section. This TCM is just really different from previous ones.

mdrew · May 4, 2015

Thanks. I'll try and read it. I want to log KR anyway..... We have "great" 90 octane fuel in Alaska....

Pat Grant · May 5, 2015

I bought a new 2014 HC with the 6.2 6 speed (with no tune) about two weeks ago. I break vehicles in the way I drive them (I'm a gasser!). If I turn off the TC and Stabiltrak, do manual shifting, from a standing start this 5,300# behemoth smokes the tires and jumps sideways all the way through first and barks pretty good in 2nd.....It is definitely more than I expected!

WendysOrBust · May 5, 2015

I bought a new 2014 HC with the 6.2 6 speed (with no tune) about two weeks ago. I break vehicles in the way I drive them (I'm a gasser!). If I turn off the TC and Stabiltrak, do manual shifting, from a standing start this 5,300# behemoth smokes the tires and jumps sideways all the way through first and barks pretty good in 2nd.....It is definitely more than I expected!

Being able to spin the all season tires on a vehicle that has 60% of its weight, over the front axle is not a good inducement about its overall performance. Not saying the 6.2 is slow either.

CounterMeasure · May 5, 2015

Being able to spin the all season tires on a vehicle that has 60% of its weight, over the front axle is not a good inducement about its overall performance. Not saying the 6.2 is slow either.

Especially if this is on the stock Goodyear tires, that will lose traction if you look at them long enough...

On my truck with Michelin LTX M/S2s, it is really hard to get the tires to come lose even with T/C and S/T off. Not really bothered by this, as spinning tires doesn't get you ahead of the F-150 driver that's full of himself.

Pat Grant · May 5, 2015

Being able to spin the all season tires on a vehicle that has 60% of its weight, over the front axle is not a good inducement about its overall performance. Not saying the 6.2 is slow either.

Especially if this is on the stock Goodyear tires, that will lose traction if you look at them long enough...

On my truck with Michelin LTX M/S2s, it is really hard to get the tires to come lose even with T/C and S/T off. Not really bothered by this, as spinning tires doesn't get you ahead of the F-150 driver that's full of himself.

Okay, I'll take the bait....

I love internet forums....I've been on them since before the internet, when you had to dial into a bulletin board (who else remembers back that far?). So, I singed up to this one today, hoping to get some intelligent information and maybe share a thing or two.

That being said, when I post a response to a forum, I have two rules that I like to hold myself to.

Stay on topic
Deal with FACTS (unless opinions are wanted on a particular thread)

So, the original post that started this particular thread was a legitimate concern about "throttle response", not the particulars of physics affecting the ability of a vehicle to spin the tires due to the weight distribution (which was incorrectly stated) or the selection of tires. I think that my reply to the original post dealt with his concern and made no claims to 0-60 times with the scenario that I set...

I feel at home already!