TCS ON or OFF??

[SM105K]

I leave traction on, and when I launch in boost it instantly kills power.

 

[ridered74]

soooooooo
waiting to see this! I have only run with TC off.
Jordan can you give more info please.
and I think the PP with Tc and Non PP can be in play here.

My car is a non PP just for the record, and I had the tires at my regular driving PSI of 35.

This morning I did two sets of pulls with Dragy. The first one I did with traction control ON first. Then I immediately stopped, reset dragy, turned traction control OFF and did the next pull. The pull with traction control OFF was faster by .09 seconds according to Dragy.

About an hour later I did the same thing, except this time I did the first pull with traction control OFF, then with it ON the second pull. The traction control OFF pull was again faster, this time by .10 seconds.

This evening I went to the local track and almost every single pass, Dragy was about .06 higher than what the time slips said, and the difference always seemed to be in my 60 foot times. I would have a 1.81 on my timeslip and Dragy would report a 1.87. So while it is off by about .06, it seems pretty darn consistent.

The tcs on/off experiment isn't very scientific since I only did four pulls total, but I will try to get some more in over the next few weeks to see if anything changes.

 

[NoSlo]

I see you are questioning the government-mandated traction and stability control system. The number one enemy of society is questions. Please continue to take the pills you have been dispensed. Tire pressure monitors, airbags, seatbelt alarms, backup cameras, are mandated because thinking has been done for you. Distracted driver alarms, speed limit alerts, lane correction if you don't signal, forward collision warning and automatic braking all coming soon to the car we know you can't operate correctly.

Traction control is part of the ABS system, it uses the brakes to slow the slipping wheel, like if you were going up an icy hill. It has to detectably slip before the system kicks in, it doesn't maintain launch torque like a limited-slip differential would. Slipping tires have already lost the advantage of static friction, and have moved into the lower coefficient of kinetic friction zone, and for brakes to to do their work, even though they transfer torque to the other wheel, they also dissipate friction and heat energy into the affected wheel's brake system when that wheel is robbed of kinetic energy to bring it back to non-slip speed.

 

[Lostneye]

Traction control is part of the ABS system, it uses the brakes to slow the slipping wheel, like if you were going up an icy hill. It has to detectably slip before the system kicks in, it doesn't maintain launch torque like a limited-slip differential would. Slipping tires have already lost the advantage of static friction, and have moved into the lower coefficient of kinetic friction zone, and for brakes to to do their work, even though they transfer torque to the other wheel, they also dissipate friction and heat energy into the affected wheel's brake system when that wheel is robbed of kinetic energy to bring it back to non-slip speed.

There is much more to TC than brake application on modern cars. Even in the 90s some cars could pull timing as well to try and limit power. Most newer cars can do much more, ABS, timing, fuel, throttle position

 

[Spyke]

'17 non-pp with 93 tune 3bar plugs & Tstat, and when I try to launch with TC on I'd say about 50% of the time if the wheels slip even the tiniest bit I'll see the TC light flash and it seems to almost put me into neutral. If I keep the gas held down it revs up with no power and I have to let off completely to bring it back. With TC off I've never had that happen. Just my own experience...

 

[Lostneye]

'17 non-pp with 93 tune 3bar plugs & Tstat, and when I try to launch with TC on I'd say about 50% of the time if the wheels slip even the tiniest bit I'll see the TC light flash and it seems to almost put me into neutral. If I keep the gas held down it revs up with no power and I have to let off completely to bring it back. With TC off I've never had that happen. Just my own experience...

Who are you tuned by. My GH tune is much more well behaved then the LMS tune.

 

[Spyke]

Who are you tuned by. My GH tune is much more well behaved then the LMS tune.

LMS but have been heavily debating switching over to GH to be honest with ya

 

[Raging Bull]

LMS but have been heavily debating switching over to GH to be honest with ya

I’m in the same boat !

 

[76FoMoCo]

when from lms to AJP there is a reason his tunes work so well..... lots of experience
Just the shift smoothness alone is worth the switch!

 

[SM105K]

when from lms to AJP there is a reason his tunes work so well..... lots of experience
Just the shift smoothness alone is worth the switch!

AJP Tune here. All of his tunes are straight money.

 

[Raging Bull]

when from lms to AJP there is a reason his tunes work so well..... lots of experience
Just the shift smoothness alone is worth the switch!

AJP Tune here. All of his tunes are straight money.

Man I never been one to succumb to peer pressure but you guys are making it really really hard. Lmao !

 

[Raging Bull]

Does brad have a performance pkg u can buy ? I’m sure he uses different gap of plug - different temp T-stat. Already have the 3 bar obviously. He is a dealer for the sct also correct ? I am leaning towards AJP but I do like the AO tune gearhead offers. I’ll never bring my car to the drag strip only (traffic light to traffic light)or the race trackI like the quick cruiser ride. I just want that push back acceleration through the gears. By this time next week I will have a new tuner !

 

[ridered74]

Does brad have a performance pkg u can buy ? I’m sure he uses different gap of plug - different temp T-stat. Already have the 3 bar obviously. He is a dealer for the sct also correct ? I am leaning towards AJP but I do like the AO tune gearhead offers. I’ll never bring my car to the drag strip only (traffic light to traffic light)or the race trackI like the quick cruiser ride. I just want that push back acceleration through the gears. By this time next week I will have a new tuner !

I've run both, and either way you can't go wrong.

 

[Jordan_R]

I've run both, and either way you can't go wrong.

Agreed, I also run both. Brad doesn't do packages however so you'd have to piece something together.

 

[Lostneye]

LMS but have been heavily debating switching over to GH to be honest with ya

I would bet switching tuners will get rid of your issues. I am very happy with Matt's AO tune, no more having to turn TC off if I wanted to get on it, shifts like a sports sedan should now, not to mention no more dangerously low fuel pressure issues in the winter.

 

[OmaHahn]

First question is do you have the Performance Package(PP)?
If so, press the TC button 2 times quickly. This will turn off TC and put you in Performance mode. That is how I attack the streets.

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This is not 100% accurate. Push the button once turns off traction control completely. Push it twice quickly puts it into performance mode but TCS is still active. Push and hold for 5 seconds while holding brake turns off everything, traction & stability.

 

[SM105K]

This is not 100% accurate. Push the button once turns off traction control completely. Push it twice quickly puts it into performance mode but TCS is still active. Push and hold for 5 seconds while holding brake turns off everything, traction & stability.

Pressing traction twice quickly in my car doesn't do anything. I have tried....lol.

 

[OmaHahn]

Pressing traction twice quickly in my car doesn't do anything. I have tried....lol.

Hym? It works on mine and even says "Performance Mode," on the gauge cluster.

 

[SM105K]

Hym? It works on mine and even says "Performance Mode," on the gauge cluster.

Yeah, there is a whole thread on it. Mine does not work.

 

[Csbbrah]

Yeah, there is a whole thread on it. Mine does not work.

That sucks. Thats how i drive it daily. Lets the rear end move around a bit. I have too much fun with my daily U Turn i have to make. Haha.

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