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Originally Posted by tomp
So Alvin, maybe you are the one we need here to be able to answer questions? There are some very knowledgable members here and expect a technically inclined answer when ones due.
Please explain to us how this "personal" tuning is accomplished/accurate when they are done in-house and not on a track or dyno? Where the initial maps created at least in this fashion? This would be an acceptable approach, providing they are down-tuned to allow for variances in weight, wind, towing etc.
We were not getting the answers we were looking for, thus I am assuming is the reason you posted. Please explain the above. Thanks!
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Kelly is perfectly able to answer these questions. However calling her/us names is not the right way to initiate conversation with anyone.
GM puts tons of nanny controls on the PCM. They also tune for the worst available gas (lower than 87 octane). On top of that they set the trans shift points up so soccer moms don't complain because they can actually feel them. You have to think in terms of GM. They do not know if you are going to try to tow big loads around, totally abuse the truck, or run the worst gas you can find.. All they know is they have to replace hard parts if you are that 16 year old kid that likes to do burnouts and donuts. Therefore they put a nanny settings in all production vehicles.
We ask questions on the ordersheets about your towing capacity so we can get a feel on how you are going to use your truck. We also have 3 different shift maps including firmness, TCC lockup, and trans shift points for you to choose from so you get your taste in shifting all the way from weak to firm. We also have around 17 different base programs we pick out biased on your modifications for different intakes, levels of modifications to the exhaust. We also have 3 different settings for towing which changes how we set up the shift points (again), how much part throttle advance we run, and what AFR we set to target on high loads.
This goes on and on.. I guess the best way to get a judgement on what we use to build a custom tune is to get on our website and look at our ordersheet.
We have worked this down to a science with R&D vehicles and TONS of experience tuning everything from totally stock vehicles to cars like a 99 TA that runs 9.77 naturally aspirated, 93 octane, drag radials, and chambered exhaust. (You should see that very soon in a GM high tech article titled "LS1 vs. LT1 shootout"
As for the other question H3's are full time 4WD. I think Kelly said they where AWD earlier. Don't you think that is kind of a nit picky thing to try to demean her with?