New here and need opinions on fixing my cars tune. Any input and opinions welcome

[Hyperlinkblue]

Hi, i need opinions on what i should do to get my cars tune fixed or retuned completely. Let me start from the beginning so you guys know what im dealing with. Car is a 17 1 ss camaro, it has a tony mamo msd intake manifold, katech ported throttle body, roto fab intake,stainless works long tubes with there mid section (xpipe etc) to a stock npp muffler, and a flex fuel sensor. The car was tuned by a local shop who is known but come to find out is also not good and plenty of people had tune related issues after some digging, i had them dyno tune my car, and it had some drivability issues after so i brought it back. They claimed they retuned it but it actually seemed worse, i lost confidence in them and gave up. Seems like they did WOT tuning and thats it. Issues include on some hits i feel the car pull power, when the cars hot and i drive thru a parking lot in first and bring it up to around 2-2300 rpm and let off, it will keep going at around 2k rpm very briefly before actually decelerating, it also stumbles every so often from a stop or when i give it a light rev. So after awhile i found someone local who had hp tuners, they briefly looked at my cars tune and said they found a few issues. I cant remember because it was before winter (cars about to be out of storage now) and one of them being cat over temp was left on and the car does not have cats on it anymore. I don't know how much experience they had on the new LT platform or tuning in general and i did not want to get screwed again so i did not have him re-tune it. So i researched more about tuning on this newer platform and learned it is harder and some tuners don't have it figured out yet. At this point in time it was winter so i stored the car. So i waited and made the decision to purchase hp tuners myself which i recently did. I do have a wide band for my aero force gauge but its not installed yet and im also considering buying another wide band just for tuning because some are easier to hook up. Now my first question is, if i want to try and correct the tune on my car, can i copy it then use my credits so i can edit it?? second question is should i just start fresh and go with a known remote tuner who has done plenty of the new LT based vehicles. I came into this knowing it would not be easy but i feel like this car has alot more left in it to run better and make more power. I need some input on your guys opinions and how you would approach this. I appreciate any advice thanks!!!

Thanks

[Ben Charles]

That setup should be fairly easy to tune!!
Sounds like whoever tuned it did some DD raping

[Hyperlinkblue]

sorry, not familiar with acronyms yet for hpt but im assuming you mean driver demand. Yeah it could be, couldent really tell you because idk what im supposed to be looking at, i know cat overtemp is on and i dont have cats so that cant be helping things either. Honestly there is probably alot wrong with it. I guess first step is to copy the tune, i have 8 credits to use so i will have to use some to copy the tune correct? or just edit it after i copy it?

[JnJSpdShop]

Like Ben said fairly straight forward combo to tune. You don't need to spend any credits to read out the tune and post it here?

[mowton]

My first suggestion in tuning these Gen V's is to leave the "max all the torque tables" at the door and set them up to resemble the new torque increases/profiles based on your mods.....and with these setups you are not only tuning the engine, but tuning the engine to adjust accrodongly based on what the vehicle is doing as well.....you only get what you need and no more...it will take away excess if it believes it is so. And it can do it pretty damn fast by pulling timing...or a bit slower by cutting fuel or throttle.


Ed M

[SultanHassanMasTuning]

when you get a chance, pull the tune post it and we all can help

[Hyperlinkblue]

Awesome, I didnt think id get this much help here so soon, i went and picked up the car today because it was nice out and to copy the tune for you guys. I read the car and copied the calibration, I also have a newbie question, im asking it because i have proprietary software for work that i use to connect to our industrial equipment for programing new software to changing a password to making simple parameter adjustments, i connect and disconnect from the vehicle before i exit the program, is hptuners the same way (VCM EDITOR)? i was able to connect and read my car but could not find a disconnect from vehicle tab/button so i exited HPT then unplugged the interface from the car..... In the scanner i found the connect disconnect but not for the VCM editor.

Here is the calibration i copied


VSM FLEX FUEL TUNE.hpt

[TriPinTaZ]

Some of the logic in the tuning of spark and fueling is not what I am used to seeing but its not anything that would cause drive-ability issues. There a few different ways to reach the desired Air/Fuel/Spark values so I wouldn't worry much about that part of the tune.

BUT and a big BUT, the Driver Demand tables have been raped for no reason. I would set all three of them back to stock values. Remember the Manual vs A8 tables are way different values. So if you do not have your stock calibration be sure to copy the correct tables from a manual car.

[Hyperlinkblue]

im trying to find the DD tables, and i been looking for about 20 minutes to no success, i downloaded a stock file and would like to compare.

Comparing to stock file, peak torque was not changed if thats what DD is?
Id assume this would need to be bumped up a little for things to smooth out?

[GHuggins]

Torque Management - Driver Demand - MAP A,B,C,D

[Hyperlinkblue]

Nothings labeled "driver Demand". I go into, Engine>torque management>General, then it list Peak torque, brake torque etc? No DD, then i compared this to a stock calibration and nothing is changed in there, so what am i doing wrong here? people stated its DD Rape but in what way, by not being changed or being changed to much? also was i in the right spot?

[TriPinTaZ]

Nothings labeled "driver Demand". I go into, Engine>torque management>General, then it list Peak torque, brake torque etc? No DD, then i compared this to a stock calibration and nothing is changed in there, so what am i doing wrong here? people stated its DD Rape but in what way, by not being changed or being changed to much? also was i in the right spot?

Are you in advanced mode view? Go into the options menu of HP tuners and change the view to "Advanced".

[Hyperlinkblue]

nope it was in basic.... WHY would they have basic and advanced.

But yes looks like they bumped up map A a lot compared to stock. They didn't touch the other maps, which must be the drive modes tour,sport,track and snow/ice. This is confusing. Stock the car put down 400-405, after bolts on's in 90 degree heat it made 460, but it runs bad on 93 and has other issues. So from my understanding, issue #1 is they bumped up the DD table too much causing a majority of my issues. Its also only different from 90% pedal position onward, makes no sense why they would only adjust just one part of that table,? appears its just WOT tuning to me. I dont really know what it should look like but it just spikes at the end, id imagine it should at least ramp in smoothly if that table even did/does need to be tweaked.