From some thing ive been reading on here its starting to become apparent that HP tuners doesnt have the capability to tune for boost as i once thought it did, can some knowledable people on here enlighten me the specifics on whether or not this can be done?

uh... HPT can pretty much do anything....

"tuning for boost" is just a matter of altering the fuel curve based on the RPM range @ wot.... shit piggybacks can do this and i've got a completely separate unit (DFMU) not even knowing about the ECU that does it.

From what I understand from my tuner friends, it CAN do it but it's not as straightforward as tuning the 2.0. There's a lot more that has to be taken into account and worked with before it can be done properly and reliably. It's not just a sit-down-and-tune-it proposition, there's a lot more work/research/trial and error involved than most tuning projects.

Yes it can

but it requires commanded cam angle table for each zone and the ability to log those things in the scanner.

also requires an advanced mathematic or physics major.

well this sux cuz i wanted to get the garrett kit but with all this tuning that will need done it will cost me a fortune on the dyno so i guess ill be forced to wait for hahn so i can at least get their base tune then have it fine tuned from there it wont be so bad. i guess what i was reading is that the hptuners wasnt able to make it a 2 bar system or something like that i dont understand it all cuz im not good with math lol

Yes it can

but it requires commanded cam angle table for each zone and the ability to log those things in the scanner.

also requires an advanced mathematic or physics major.


This is only if your doing VE tuning, if you review hahn's post, they arnt running SD, nor garret. Therefore, all you need to tune is maf, spark and PE. This would be no different then say a LD9, OR ANY EFI CAR running a maf!

Where the confusion is with most people is, the 2.0's os controls more aspects of boost then just PE/MAF, so if all you know is the LSJ, then looking at anything else you wouldnt understand how anyone else could be turbo'd.

In otherwords, run your kit with a maf, get a good boost controller, and tune normally.

This is only if your doing VE tuning, if you review hahn's post, they arnt running SD, nor garret. Therefore, all you need to tune is maf, spark and PE. This would be no different then say a LD9, OR ANY EFI CAR running a maf!

Where the confusion is with most people is, the 2.0's os controls more aspects of boost then just PE/MAF, so if all you know is the LSJ, then looking at anything else you wouldnt understand how anyone else could be turbo'd.

In otherwords, run your kit with a maf, get a good boost controller, and tune normally.

It doesnt work like that tho...If the Map tables dont correlate to the maf tables the pcm will go into a reduced power engine safe mode. You have to be able to tune the map esp if ur adding boost. NA you could make it work but not with boost.

Sd is a mode of tuning to correct values...from there u can then correct maf but the way the 2.4 pcm is setup you cant even run a SD mode...well u could but ud have no idea what ur changing.

Basically without the map car will throw a fit esp if it doesnt match up...the cars can run without a maf (sd mode) but the table is too complex to tune. and the map values is always used as a lookup rationality check

well, tcarter and i are gonna figure something out here soon hopefully.

It doesnt work like that tho...If the Map tables dont correlate to the maf tables the pcm will go into a reduced power engine safe mode. You have to be able to tune the map esp if ur adding boost. NA you could make it work but not with boost.

Basically without the map car will throw a fit esp if it doesnt match up...the cars can run without a maf (sd mode) but the table is too complex to tune. and the map values is always used as a lookup rationality check

With any other car i would agree with you, I'm not sure how much that lookup wieghts on the 2.4L. Its beens said a few times that the 2.4L might not even do any comparisions, or very few just for transitions. The thing is no-one really knows 100% outside of gm.

either way, im 98% possitive hahn's cobalt doesnt have a single bit of sd tuning done, and based on that its safe to assume that sd tuning can be skipped.

Your best bet is fine someone who has a Solstice with Hahn's kit and HPtuners than steal their tune and tweak it for your car.

Your best bet is fine someone who has a Solstice with Hahn's kit and HPtuners than steal their tune and tweak it for your car.

i hope your kidding, because this is a horrible idea.

Why is that a horrible idea? Hahn in fact does use HP Tuners for their systems, and it is the same exact engine.

Why is that a horrible idea? Hahn in fact does use HP Tuners for their systems, and it is the same exact engine.
Exactly,

Just as a Side note:
Holy Crap Halfcent Agreed with me YAY PARTY TIME

But If you dont believe that will work, which it should, read this I got this off of HP forums.
http://www.4cyltuner.com/Forum/viewtopic.php?t=20

Why is that a horrible idea? Hahn in fact does use HP Tuners for their systems, and it is the same exact engine.

Its not an issue of using Hptuners. I wouldnt even suggest people take a tune from another same make/model, and yellow's suggestion is to use a tune from a completely different car!
You might be able to do this and get away with it, but it would be a better idea to start from scratch on a dyno and get the numbers your car wants, not what a rwd roadster in another state wants. Tuning is such a simple process that theres no need to "cheat" or take short cuts...

Also, if they did in fact use hptuners, then chances are they closed the tune for read/write, so you cant leech their tune anyways. which makes this a pointless discussion.

back on topic, How did you confirm they used hptuners? If they did, this means they didnt do any SD tuning, since 2.1.14 was the first upgrade that allowed us to see the zones dealing with the VE. which confirms what i've been saying... just tune your maf/pe/spark

But If you dont believe that will work, which it should, read this I got this off of HP forums.
http://www.4cyltuner.com/Forum/viewtopic.php?t=20

I'm not sure i follow. i think you gave the wrong url?

I suggest using this as a baseline, something to give you an Idea of what you should be looking for. Dyno tuning a multiple bar map from scratch is going to take a while. Another quick question for you do you know if the stock sensors for the 2.4 even support multiple bar maps???

Another quick question for you do you know if the stock sensors for the 2.4 even support multiple bar maps???

Hahn used the stock sensor and stock ecm.

im am acurious now on whether or not a hahn solstice or sky would be able to share the tune with us or if its blocked.

http://www.hptuners.com/forum/showthread.php?t=9442&highlight=hahn
there goes my idea out the window.

from what i see ls2 edit supports the 2.4 as well

http://carputing.tripod.com/LS2main.htm

Someone order it and ill help em tune it for free as I love to learn...I'd really like to know what diff parameters ls2edit supports compared to hpt

from what i see ls2 edit supports the 2.4 as well

http://carputing.tripod.com/LS2main.htm

Someone order it and ill help em tune it for free as I love to learn...I'd really like to know what diff parameters ls2edit supports compared to hpt
I believe LS2edit was the software used by whoever tuned for the hahn solstice kits. They had support about the same time Hahn kits were released, but HPT didn't offer 2.4 Solstice support until the most recent version.

Did you seriously make a poll asking if HPT could tune the 2.4 for boost???

And as has been stated, if Hahn did use HPT to tune their 2.4 Cobalt (which I highly doubt after talking to Bill Hahn a few months ago), you can bet that the tune is locked just as the Solstice tunes are. Do you honestly think a company would put so much time, effort, and resources into developing a kit including a tune and then leave it open to the "public" to copy?

What was the point of this thread anyway? To get opinions on HPT???

I don't make this stuff up...

http://www.hptuners.com/forum/showpost.php?p=65975&postcount=2

I don't make this stuff up...

http://www.hptuners.com/forum/showpost.php?p=65975&postcount=2
He said the Cobalt kit, which isn't released. I was speaking of the 2.4 Solstice kit, which has been released longer than HPTuners support for 2.4 LE5 has been around.

Edit: Nevermind, I assume you were replying to PpAzZ1101.

I don't make this stuff up...

http://www.hptuners.com/forum/showpost.php?p=65975&postcount=2
Hmmph... good find. That's news to me. Bill seemed... surprised (for lack of a better term) at the idea of using HPT for the LE5 Cobalt kit when I talked to him... but then again, that was a few months ago.

I remember back when a guy one here tried using a solstice turbo tune from vector motorsports on his cobalt 2.4 that he had turboed. He was saying it either ran bad or went into limp mode. But if they did indeed use hptuners to tune the cobalt i'm sure we could get the turbo tune from Vector and atleast use that as a starting point and go from there.