I tried a Diablo for a short period of time on my truck and I was not impressed. Might be that they do not support the transmission in my '04 and SC does and I've gotten so used to it, but the shifts felt like pure mush and the truck completely lacked low end grunt.

As far as documentation, I think it's unreasonably to expect SC or any other tuner manufacturer to have to list EVERY single change their canned tuner does to the stock tune. You want that kinda information then pay for a custom tune and have them provide you the code (if you can make heads or tails of it). Incidentally, before I bought my original SC back in '05 I had at least a dozen questions that I could not find the answer to online. I posted on their forum and had all of them answered in a satisfactory manner.

You can always sell the tuner and go have the dealer change your speedo with the StarScan. Many dealers will do it for free, some charge $50-75. I have reservations that you'll ever be happy with this tuner and if you had gotten a DSP I am sure you'd be posting the same criticisms over in that thread.

 

Like I said...I never had a Diablo, so it IS possible I would be just as disappointed in that one too. And if thats the case, Im just sorry thats all the tuning options we have for our trucks.

And I cant see these tuning companies keeping their tunes a secret. 2 degrees, 3 degrees, 4 degrees...so what? Its not like its a secret formula...anybody that is able to tune an engine would come up with the right combination eventually.

And even if they didnt want to give out the specific numbers, they could provide an FAQ or chart that outlines each tune, with the change levels "stock, minimum, slightly, moderate, maximum" like these examples;

Tune#1
A/F Ratio (rich/lean): moderate (lean)
Timing advance:maximum
Shift points (lower/higher): moderate (lower)
Shift firmness: n/a
Lowest octane required: 92

Tune#2
A/F Ratio (rich/lean): slightly (lean)
Timing advance: minimum
Shift points (lower/higher): stock
Shift firmness: moderate
Lowest octane required: 89

Tune#3
A/F Ratio (rich/lean): stock
Timing advance: minimum
Shift points (lower/higher): maximum (lower)
Shift firmness: slightly
Lowest octane required: 87

Again, these are just examples, but if SC would post something like this, Im sure many would find it useful.

Just last night I was showing the tuner to a pal, and he asked;

I explained to him that the shift points are most likely changed in the tow tune, and that has a huge effect when hauling stuff. He then asked;

I told him I didnt know for sure, and the manufacture doesnt disclose the information. He paused for a second...still looking at the tuner, and softly said;

And I had to reply...yes, it does.

But like I said a few times before, it is what it is, and even though I spent $300 to change my tire size, I still feel better than giving $80 to the stealership for 2 minutes of work.

Thanks for everybodys input/comments.

-Chris

 

Chris,

I believe that the tow tune 1) increases timing, but not as much as performance tune to keep a loaded engine out of detonation, 2) increase torque and move it lower in the power band, 3) increase line pressure in the trans, and 4) change the shift points in the trans.

I believe the performance tune works similar to the tow tune, but increases the timing more, manipulates torque lower in the power band and HP higher in the power band.

 

Just bought one Cortex on Ebay. Can't wait

 

I didnt think there was an option to change the pressure (shift firmness) on our '05s.

Anybody?

-Chris

 

there a bull website. Everything on there sucks.

 

Correct. However, one way to increase shift firmness is to adjust TM. Line Pressures was talked about as an option at SC but, I don't know if it's been approved yet or will be approved.

 

if it's been asked i'm really really sorry lol. friend of mine has a flashpaq for an 05 hemi. I have an 06 Hemi. will his tuner work and will i be able to turn off the mds?

 

If the programmer is either an 1815, 1856, or 1950 model and is not vin locked to your friends vehicle at the time of use you should be good to go.

Scott

 

Shift firmness aka trans TQ management is different than Line pressure adjustments. The advanced trans tuning offers 04-10 models with options to tune Shift firmness but not Line pressure.

Scott