Hey everyone, this is my first post, recently purchased a 2009 Cobalt SS and had it trifecta tuned. Im really liking the car and I'm considered running the 1/4 mile at the track this weekend just for fun. I have a few questions though, based on my experience using the launch control I'd say I get way too to much wheel spin and could probably take off much quicker with traction control on by myself. As far as the NLS goes, I've only tried it once because I just cant seem to train my brain to keep the gas pedal to the floor when shifting, so unnatural for me. I guess my question is how much of a difference do you think it would make to the 1/4 mile time if I didnt use NLS vs if I did. And do you guys run the strip with the traction control on or off, and what kind of difference would that make? I basically just want to figure out how to run the fastest time possible.

 

I'm HP tuned with bolt ons and I leave traction control on and NLS. If you don't NLS you are losing time waiting for the turbo to spool up again after each shift. I don't know exactly how much time you lose.

Launch control has been discussed a lot and what you said is the verdict. It's set way too high and you will spin way too much if you use it.

My best is 13.32@112mph. Traction control off spins a bit too much for me...but it was a cold night when I last ran so I suggest you play with different settings and see what works for you.

 

Not a 100% sure but it is my understanding the Tridfecta tune is turned on in Competition mode only. But I might be wrong. Somebody else chime in. In any event it's not entirely necessary to use the Launch Control even though it is enabled. I launce at 2000 to 2500 and try to control the throttle for max acceleration and min wheel spin. Not easy but it produced my best run which is my 3rd run since 1967 which is the last time I was on the track. I too have trouble accepting NLS but I'm working on it. And anybody that doesn't believe in NLS I don't think fully understands turbo operation. I expect much better things in the future.

 

trifecta is comp mode or tc off all together depending on how vince tunes you

mine tune is engaged under both conditions

 

All I know is I hit the button twice and go like hell.

 

Vince has mine set up so I'm always running the tune unless my cruise control button is on. He said thats what he recommends as u don't need the boost when you're in cruise control and if you set it up to work on the traction control button you never have the option of using traction control with the tune.

 

So you're ON the tune in default? You can only turn it off with the cruise ON? What happens when you take it to the dealer, if you need to? You MUST restore the tune to stock? Otherwise the tune is on as soon as they start the engine and run the car through the wall. Not for me!

 

am i the only one who thinks that traction control on normal street cars is useless? its good for getting me in a wreck... i'd rather blow the tires off and feather it to do what i want rather than the car just absolutely deny me.

most people who goto the track take some rediculous amount of time like .35-.5 seconds to make a shift, with the NLS it forces you go be faster than .4 iirc and then your turbo doesnt compound the issue by taking another .5 second to respool...

basically if you want to be one of the tards that goes 14.90@97 and then wonder why your car is so slow then feel free to lift off the gas between shifts.

 

I NLS on the track alot. Never really on the road. I will be NLSing on the big turbo from 1-2 and 3-4.

 

i did it getting on the highway after lunch. just to prove to myself that my shift linkage was okay since it was replaced last week.

 

NLS with a tune is asking for problems. It's been said time and time again already. I do it but i'm willing to face the results of applying 360wtq to a trans that was designed for 240wtq.

 

I have been know to NLS 1-2 a few times with slicks I ALWAYS 2-3

 

I just asked Vince at Trifecta about NLSing with his tune. The following is his reply. Also. Just because the F35 trans was initially rated for 260# of torque doesn't mean that's engraved in granite. Every manufacturer sets a safety factor on their parts. It's USUALLY 100%. So the safety margin on the F35 is 260" lbs. which gives the trans a maximum designed torque of 520' lbs. 320 would be 61% of that. Still a respectable design element. I DID see somewhere, and I wish I could find it again, the rated torque for the trans AFTER the Upgrade came out, of 320' lbs. GM, or any other manufacturer for that matter, would NEVER produce anything whose max designed is = to max operating if, for no other reason, warranty. Having said all that, it probably isn't the wisest thing to TEST the trans on every shift. Concerning the following. I have done several NLSs with no apparent problems. Maybe that POP is what I hear. I will continue to NLS till I find it's not working as designed.

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Feel free to post this on the forums…

I’ve had some people report that they experience misfiring, and sometimes backfiring when no lift shifting with our tune.

The reason this happens is because the ECM uses the rev limiter code to hold the engine at the programmed rev limit speed, and specifically, when no lift shifting, the ECM cuts fuel and timing (versus simply closing the throttle) to prevent an over-rev condition. With the higher boost levels that our tune provides, this causes the ECM’s rev limiter code to interfere more aggressively to prevent over-revving which can causing the misfiring to occur.

We’ve demonstrated the ability to solve this issue by simply pulling back the boost level in the RPM range near the rev limiter. However, all the customers I’ve spoken to so far have elected to stop using no lift shift because they don’t want to sacrifice boost level.

Vince Geglia

 

why do people care if it backfires on shifts? its raw fuel exploding in the exhaust... i watched Millers Civic do it probably 10 times on saturday going 8's in the 1/4 lol

 

The back fire DOESN'T bother me. I do realize it's only the residual fuel in the exhaust left from a rich charge at high revs. I'm just trying to point out that it IS normal. Maybe I worded that statement wrong.

 

I am going to see if Vince can delete the stock NLS stuff so I can just use the wotbox.

 

NLS 1-2 on the big turbo? SWEET!!

 

Well I am going to try anyway lol.

 

at least once. lol.

 

I hope nothin breaks cmiller lol

 

Me too.

 

I nls the second time when i went to the track. On stock runs i picked up 2 tenths. NLSing with the tune on, i picked up anywhere to 3 to 4 tenths. But just make sure u make it a good shift where u dont break anything

 

I NLS every time at the track my best time was 13.4 @ 110 mph. Still no Linkage or trans issues.

 

How do u make it a good shift when NLS... Do you put the clutch in halfway and shift as fast as you can and letting off as fast as you can?