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Discussion Starter · #1 ·
If you were waiting for a used HPTuner to become available for a good price, now is the time! For $250, you'd have everything you need to tune your vehicle (each vehicle requires 2 credits to "license" the vehicle).

This is by far the cheapest I've seen a used HPTuner device in some time - especially because it also has 2 credits.

If interested, jump on it QUICK because it will NOT last long.

Not only can you tune your vehicle, but HPTuners also provides an AWESOME scanner application....

HP Tuners | eBay

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Discussion Starter · #3 ·
PM sent! Just for clarification, I am NOT the one selling this device - just letting people know that it's out there. Basically, it's half price compared to a new HPTuner device. WHen you buy new, they do include 8 credits (instead of the 2 included with this used device), but since you only need 2 credits per car, most people only need 2 credits anyway....

I will say - the HPTuner purchase (I bought used as well) ranks up there as one of my best purchases for the Impala (along with my Rosen head-unit)! I *love* being able to tweak things like shift points, TCC lock/unlock speeds, amount of torque management applied to shifts, driver-demand modifications (basically, gas pedal sensitivity), etc.

PLus I learned a TON about hos these cars work1

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Discussion Starter · #4 ·
Even if you've been considering the Overkill tune - you can purchase this device and then purchase the tune files from Will for $150 and have not only the Overkill tune for $400 total, but also have the ability to tweak it to your liking, revert back to stock tune if/as needed, etc...

Very inexpensive way to get yourself into an Overkill tune (with benefits!).

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Discussion Starter · #5 ·
Well, if anyone was interested in this and waited, you're too late - it's gone already (told you it wouldn't last long!). Used HPTuners devices usually go for almost as much as new ones. You *rarely* find them this cheap.

Unless, of course, someone from here bought it!

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Discussion Starter · #7 ·
You should have said something - I would have been willing to buy it and re-sell it to you (for the same price of course!).

I would love for a few others to have an HPTuner so we could share experiences, etc... I still change my tune from time to time. I really enjoy seeing how different settings change the feel of the car. At first, I was deathly afraid of changing anything, but then I realized that as long as you make minor changes and only change things that you understand, it's actually pretty safe...

And the scanner application is just pure awesomeness. Can see exactly what your car is doing and why. It's like Torque Pro x 1000. :)

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Discussion Starter · #9 ·
No, Torque Pro does NOT support ABS and SRS stuff on GM vehicles. Actually, my understanding is that it's not a limitation of Torque Pro, but rather the bluetooth OBD-II adapters and GM vehicles. I *think* that it has something to do with GM not releasing the info required for "3rd party" support or something like that. In other words, you'd have to pay GM big bucks to get the data required to interface with it. At least, that's what I seem to remember the reason being...

Torque Pro will report all data that the bluetooth OBD-II adapter has access to, so it's not really a Torque Pro limitation...

EDIT: For that matter, I don't think HPTuners scanner supports it either - for the same reasons.

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Discussion Starter · #11 ·
An HPTuner Pro with 2 credits just popped up on Ebay for $350 if you're still interested. Have to be quick though - it won't last long - trust me!

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Discussion Starter · #13 ·
Man, that sucks! HPTuners is so much nicer because not only can it do what Autocal does, but it also allows you to modify the tune as desired. Just stuff like adjusting the transmission shift points, amount of torque management, etc to your exact preferences is so nice... So if you wish that it shifted into 6th a little later, for example, it's extremely easy to do that. it would have cost you $450 total if you went the HPTuner route ($350 for HPTuner device + $100 for the HPTuner tune files from Overkill) - which is probably less than you paid for the Autocal solution (just a guess though).

Oh well - if you do ever decide to get an HPTuner (the $350 mentioned above is long gone already), you can just read the Overkill tune from the car since you will have already applied it with Autocal).

I still modify my tune from time to time trying to "perfect" the shifting to my preferences. :)

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Discussion Starter · #15 ·
My understanding of the AutoCal device is that it simply allows you to "apply" a custom tune - not modify it yourself. I think it also lets you datalog and read/clear codes too. But what it does NOT allow you to do it modify the tune - just apply it and datalog.

With an HPTuner, you can do all of that, plus you can actually modify the tune yourself. It's really a whole different ballgame in terms of functionality....

Either way (AutoCal + Overkill Tune or HPTuner + Overkill Tune), you'd still end up with the same Overkill tune (although, I think the HPTuner version of the Overkill tune allows a few "extras" that you can't get with the AutoCal version) - it's just that if you go the HPTuner route, you can also modify the Overkill tune yourself - or design your own custom tune (which is what I ended up doing - I don't even use the Overkill tune).

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Discussion Starter · #18 ·
There are certain things that are somewhat easy to modify in a tune (such as shift point and torque management stuff), but other things like engine timing require a great deal of knowledge. Basically, I used the Overkill tune to learn a lot about how things work (by using the HPTuner software to compare it to a stock tune to see what was changed and why). It takes a lot of time and research to learn this stuff. Obviously, you have to be very careful and only change things that you fully understand - you don't want to blow up your engine. :) I've spend a LOT of time doing research on the HPTuners forum (and asking questions).

As far as I know, you can't modify the tune with the AutoCal device at all.

And yes, with the HPTuner package, you can edit your tune on a PC "remotely" and then just "apply" it to the car when ready. HPTuners also has a fantastic scanner application for reviewing datalogs. Very, very powerful software.

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Discussion Starter · #20 ·
Yeah, that's one of the things I also modified on my 2012 - changing when the TCC locks/unlocks to avoid those "bog" situations. If you've already purchased the Overkill Autocal solution, I'm sure that he can modify that for you (if not already done in his tune). But it definitely is nice to be able to do that kind of stuff yourself instead of relying on someone else to tweak things... I must have modified my exact shift points, TCC lock/unlock speeds and other trans parameters dozens of times to get them "just right" (for my driving styles). :) With the HPTuner, it literally takes less than a minute to update the tune parameters once you connect it to the car.

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Discussion Starter · #22 ·
So, if you bought the Tuner used, then you must have sent it to Overkill to have the custom tune loaded to it, and then he sent it back?
No - with HPTuners, the tunes are never actually stored on the HPTuner device directly. The HPTuner hardware is just an interface used between the software on a laptop and the car's OBD-II port. The tunes themselves are just stored in files on the laptop.

The Pro version of the HPTuner hardware allows you to datalog to the device itself whereas the Standard version requires that you use a laptop to datalog...

The Pro version also supports external sensors (such as a wideband O2 sensor) - although nowadays, there are widebands that just connect to the laptop via USB, so that is not such a big deal anymore...

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Discussion Starter · #24 ·
HPTuners is simply a tool that allows you to modify the tune in your vehicle. It does not come with any tunes for any vehicle - it just allows you to modify your tune.

That being said, there are a few tunes available in their user-supplied "tune repository". These are tunes that other uses have modified and have submitted. There is no "safety" or "sanity" checks on these tunes whatsoever there, so it can be risky to apply them without thoroughly reviewing them first.

What year/engine is your vehicle (I don't remember from the top of my head)?

Also, you can always but the Overkill tune from Overkill - he charges $150 to take your stock tune file and modify it - which you can then apply with HPTuners. The $150 fee is assuming you already have an HPTuner. If you are looking for performance, that is probably your best option - unless you are willing to spend a LOT of time researching how to modify the tune yourself (takes a LOT of effort, time and testing). You *really* have to know what you are doing if you want to modify the tune for best performance.

Hope that helps.

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Discussion Starter · #26 ·
Yeah, when (if) you buy the Overkill tune, he will supply both an 87 octane version and a 93 octane version (basically, just different ignition timing maps) of the tune. I no longer use my Overkill tune (I was looking more for "comfort" over performance), but I did use it as a learning tool - and using it for that alone is worth the $150. By comparing the Overkill tune to the stock tune (via the HPTuners "Compare" function), you can see exactly what Overkill changes and really learn from it. And then little by little, along with some reading over on the HPTuners forums, you'll start feeling more and more comfortable making your own changes to customize the tune to your exact "specifications". In particular, the shift points, amount of torque management and gas pedal sensitivity are some of the easier things to really tune to you exact preferences. Some of the stuff is *very* technical and involved (such as idle tuning!), but other things are actually kind of easy to tweak - and small tweaks to things like the shift points can really make the car behave just like you want it.

If you like to "tinker" with things, you'll love HPTuners. Just go slow - make minor changes and monitor how it changes things (the HPTuner scanner is an *awesome* tool to see *exactly* what your car is doing!). You can log a drive and then review it later, frame-by-frame if you want - and then make more changes based on what you see in the logs. It really is good stuff.

I wish we had more folks using HPTuners on here. Would be great to interact with other Impala owners and learn from each other.

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