Great results from PCM for Less tuning . . .

[Huck BB62]

So is this "kick in the pants" from harsher or higher rpm shiftpoints? Punching the tow haul button on other GMs make the vehicle respond this way (H3s should have this also in my opinion) Is there any dyno testing done? If the dyno proves it, I'm a believer. I'd love to see some testing. I'd like to see different intakes tested. I'd like to see exhausts tested. I'd like to see before and after charts of the PCM tune on a stock vehicle using 87 octane most of all. You can't even GET 93 octane most places and even 91 octane is forty cents more a gallon!


I don't care for the rev limiter myself BUT has anyone ever considered that if there's a blowout on someone's low rated all terrains after the limiter's been lifted that lawyers are going to tee it high and hit it long?

[Hunner]

Originally Posted by Huck BB62

So is this "kick in the pants" from harsher or higher rpm shiftpoints? Punching the tow haul button on other GMs make the vehicle respond this way (H3s should have this also in my opinion) Is there any dyno testing done? If the dyno proves it, I'm a believer. I'd love to see some testing. I'd like to see different intakes tested. I'd like to see exhausts tested. I'd like to see before and after charts of the PCM tune on a stock vehicle using 87 octane most of all. You can't even GET 93 octane most places and even 91 octane is forty cents more a gallon!



I don't care for the rev limiter myself BUT has anyone ever considered that if there's a blowout on someone's low rated all terrains after the limiter's been lifted that lawyers are going to tee it high and hit it long?

I think you should leave your Hummer like it is and only go to Wally World and read Four Wheeler Magazines on the isle next to electronics and chill out. Oh and try Google for those answers!

Huck brings up some good points. GM engineers balance power/mpg/durability/driveability/emissions carefully. Many of the PCM changes mentioned compromise durability, gas mileage and probably emissions in order to possibly eek out more power (which still needs to be proven). But we can always hope.

[ChevyHighPerformance]

I am not financially connected with PCMforLess, but they shared their unprotected tuning with me. They've done a really good job. On an 06 H3 you will notice improved low end grunt and improved upper end power. Shift points are changed and believe it or not the PCM changes do NOT compromise durability, gas mileage, or emissions. Based on my experience, if you have an auto tranny the PCMforLess will INCREASE your tranny's life. Emissions do not change for closed loop (part throttle) and the net emissions decrease for wide open throttle. Most people see improvements in MPG.

The rev limiter shuts off fuel when you exceed a certain RPM. The speed limiter shuts off fuel when you exceed a certain MPH. If you don't want the speed limiter changed then don't change it.

If you put on larger diameter tires without PCM adjustments, guess what you've effectively increased the speed lmiter. The PCM will think you are going slower than you actually are.

[JWSchmidt3]

Originally Posted by Steve - SanJose

Huck brings up some good points. GM engineers balance power/mpg/durability/driveability/emissions carefully. Many of the PCM changes mentioned compromise durability, gas mileage and probably emissions in order to possibly eek out more power (which still needs to be proven). But we can always hope.

No they don't. GM engineers tune for worst case scenario under worst case conditions for exactly the warranty period. Damn, you Cali boys really need to get outside your borders more often.

[BuzzH3]

I have a couple questions. What if I get the tune, then a few months from now decide that I want to switch to 35's? Can I get an updated tune for a lower price or would I have to pay another $149?

Also, in the event that the dealer has to re-flash, is there a way to get a loaner while mine is being re-flashed with the new tune?

Sounds promising, even if it's imaginary!

But if it can be proven, that would be great.

[JWSchmidt3]

Originally Posted by Steve - SanJose

Sounds promising, even if it's imaginary!

But if it can be proven, that would be great.

Over 2800 posts, were they all this intelligent??



Another internet work of art. Your kind aren't worth the effort, have a good one Jr.

[JWSchmidt3]

Originally Posted by BuzzH3

I have a couple questions. What if I get the tune, then a few months from now decide that I want to switch to 35's? Can I get an updated tune for a lower price or would I have to pay another $149?

Also, in the event that the dealer has to re-flash, is there a way to get a loaner while mine is being re-flashed with the new tune?

Sorry for the drama, didn't want your question to get lost. Kelly can answer better, but I do not believe you pay full $$ again for simple changes, but hopefully Kelly will verify.

BTW, was cruising around the internet, and found another H3 "out of the box" tune, "on sale" for $499. I won't post a link, but just another example of how good a deal PCM for Less is.

[ChevyHighPerformance]

Originally Posted by BuzzH3

I have a couple questions. What if I get the tune, then a few months from now decide that I want to switch to 35's? Can I get an updated tune for a lower price or would I have to pay another $149?

Also, in the event that the dealer has to re-flash, is there a way to get a loaner while mine is being re-flashed with the new tune?

Just pay for the shipping and they'll change the program for you. It's best to hear this from Kelly though. Edit -> I was wrong about the cost; see Kelly's post below.

You have to ask them about the loaner PCM. I think they are pretty flexible and accomodating.

[Gottmud]

I just sent my PCM in for tuning. I have 35"s & a K&N air filter. I will give the board a review of the results as soon as I get it back from PCMforLess.

[Huck BB62]

Originally Posted by Hunner

I think you should leave your Hummer like it is and only go to Wally World and read Four Wheeler Magazines on the isle next to electronics and chill out. Oh and try Google for those answers!

Why the attack? Wouldn't YOU like to see some dyno results or are you happy with just believing?

Here's my history on this "seat of the pants" krap: I had a turbo 400 built for a '67 Commando (yeah, I've been wheelin' a long long time) The guy swore it would pick up the performance of the rig (think this is the first time I've heard these kind of things before?) The tranny shifted at a higher rpm and shifted HARD. One would think that it was a rocket ship when in all actuality, it was simply a hard shifting unpleasant krappy rebuild that did nothing for the actual performance.

Back to the intake debate, the makers all swear about their performance gains, but I've SEEN dyno tests on a few different vehicles that show they do absolutely nothing to improve output other than make the vehicle noisier which I think has a LOT to do with how people perceive that their vehicle is faster.

So, I'm not krappin' on anyone here, I'd just like to see some dyno results.

A smooth shifting vehicle is what most people want. The tow/haul mode is on other GM products to make the transmission shift at higher rpms and hold lockup longer. The reason they simply don't make it do it all the time is because the vehicle drives harsher, and wastes fuel when driven normally. Harsher shifts are not desired for icy driving, muddy driving, or even for creature comfort.

Show me the dyno charts, I'll believe.

I'm kinda betting on another thing here too and ask any diesel guy anywhere how the dealer feels about aftermarket programing and how they affect warranty. Now, this dealer they have does it, I'd like to see how other dealers feel about it. In fact, I will call my local service manager about it and would invite others to do so before they change their program. Again, on this too, if it turns out fine, I don't see any harm in it.

I'm raising questions on this NOT because I don't want to think it works but because I'd like to be darned sure it's ok before I spend the money, the time, the effort and to ensure that I'm not a skrewed pooch with the warranty if I do.

I KNOW programmers work on diesels, but the dyno results and reasons why are clearly evident. What in this program change makes the I-5 put more power out? (besides the timing change for the 93 octane fuel) I looked at their website, and the dyno result is very impressive, IF, and that's an important IF you don't have to run premium fuel to get those results.

This service looks promising. If it's all it says it is and my questions are answered (and why wouldn't they be?) I'll be paying for it.

[JWSchmidt3]

Huck, chill out dude, no one is attacking you. You're obviously an experienced wheeler, and you obviously had a bad experience once, but you need to get off your dyno horse man.

First off, 4 wheel dyno's aren't exactly common. 2nd off, we're not adding blowers here and expecting 100+ HP, we're talking about a basic "clean-up" tune. I would imagine disconnecting part of the drivetrain just to see a few HP on a dyno would be ludacris and probably cost more than the actual mods.

The gains are minimal, but very effective, that's the point here. You can take mine and every other person's word about their results, but I'm not going to knock myself out just to make you and all the California boys happy with our results.

I also drive a nearly 700 HP Vette, I think I can decipher from a few SOTP ponies in a slow-azz H3.

[stagger_lee]

Originally Posted by JWSchmidt3

but I'm not going to knock myself out just to make you and all the California boys happy with our results.

Who you callin californian, Mr Scmidt?! It is a cranky bunch out here, huh? Its all the smog and traffic.