i dont know either...i did it perfect the first time i ever tried...btw i was driving someone else's ss/tc(1st time I ever drove a tc) too haha it's sad really

 

Or your tires will spin like mad. It still propelled prety well but more tranction would have been scary fast.

 

It really does only take a fraction of a second to be holding at red line and shift. If it took 1 second and you shifted three times in the quarter mile you'd lose 3 seconds. Most good drivers do shift that quick. I don't think the 300 milliseconds is a "hard" limit where the engine cuts out or anything, but if you are holding the gas pedal to the floor and shift like molasses and go over that amount your boost will probably start to fall off.

Also if you do the shift just right and quick enough you don't always get the popping sound. A single pop is normal and fine but if you're getting multiple pops you may want to evaluate how soon and how quick you're shifting. And I can't stress this enough and said it before in this thread, just because you shift a little quicker than normal you don't need to physically hammer on the shifter. Just do it normal but quick and you'll be fine.

 

I am very curious as to whether or not the electronics use a torque limiter during the NLS. I'm just concerned about the long-term life of my vehicle, after the wonderful 100K mi. warranty.

As exciting as the NLS is, I don't see myself using the NLS everytime I get onto freeways or even on a road course track day, if its putting ridiculous amounts of stress on components.

Forgetting about whether or not torque is limited, where specifically is the shock being delivered to during the NLS? I know its somewhere in the clutch components (which is a wear item, so that wouldn't bother me so much). I'm thinking it's the diaphragm springs, and the release bearings, which are also wear items. Those don't bother me so much, although the engine / transmission mounts definitely take up some of the force. I know those aren't wear items, and I hate pressing out bushings for engine mounts. Hydraulic presses scare me.

Can anyone else think of any other components that are taking a beating during a NLS?

 

If you're shifting normal but quickly the clutch disc is going to slip as the rpm's are held and the clutch is released after the upshift. GM supposedly tested and put a high capacity clutch in so that type of quick slip probably isn't that bad, especially since it does look to be torque managed/limited during the shift. It appears that the no-lift is primarily to provide better transient boost response. Just because you keep boost from falling as fast doesn't mean the engine is still making tons of torque. It doesn't take much energy to keep an engine not under load and already spinning at redline speed there for a fraction of a second longer during the no-lift upshift. I need to do some high-speed data logging to check, but going off GM info and how engine management works, during a no-lift shift they're keeping the throttle open so boost doesn't stack up in the intake tract and slow down the compressor and keep the diverter (e.g. BOV) shut so none vents off. They then retard timing and inject fuel a few times to keep the engine spinning and pumping air and providing a touch off exhaust gas velocity. Again not making tons of torque but allowing to get back into boost and power faster when the shift is complete. The biggest issue I see is those who just dump the clutch and hammer the gear shift lever trying to physically force a faster shift. That will cause way more driveline shock and long-term wear/damage. I still wouldn't be doing it every single shift but at the track and occasionally on the street shouldn't be too bad.

 

Thank you, blackbird. I can now rest assured.

 

i think blackbird is really yoda in disguise

 

if you bring your car back in before the break in period as far as i know if they can tell you ragged on it or beat on it ( with no break in) they can scan the computer and see how hard it was ran. they can potentialy void the waranty ( just what i heard from my chevy dealer friend)

 

they can tell if you have bounced it off the rev limiter

 

Not if you wise about it and buy an extra ECM and tune that puppy and keep the stock alone. HELLO!!

 

^wait a minute. i want to get an aftermarket tune. Can i take out mys tock ECM, buy another, tune it, and when i bring it in for service pop my stock ECM in. Or can they tell if I even remove my stock ECM.

 

i'm sure they can tell how many miles are on your ecu vs. your car and see that it doesn't match up.

 

no they can't do that as the mechanism that detects mileage isn't even in the ECM, but good luck getting a new ECM, getting one isn't the problem, but getting the clutch relearn on a blank ECM is, it has to be done by a GM service dept, good luck explaining that one to your dealer, lol

 

yeah that sucks oh well.

 

well could you pull all the info off the stock ECU and put it on the new one and then tune it? like with HPT.

 

This has been stated before, but fck it, I'll say it again. The tune doesnt void it, unless its what causes the problem, and secondly, why is everyone trying to pull one over on GM by wanting to switch ECU's. Thats part of the reason car companies, fck it companies in general are so shady regarding warranties. BECAUSE some people are shady with the product the bought that is covered by warranty. Seriously guys, if you want an aftermarket tune, then suffer the consequence of POSIBLE warranty loss. Now I will get off my soapbox.

 

clutch relearn still has to be done

tell that to the Ford and Dodge owner who had Banks and Bully Dog kits on their diesels

 

well thats what i mean, wouldnt you be able to transfer over clutch stuff too?

 

tried NLS today 2x from 2nd to 3rd and admittingly missed both times. My turbo sneezed and my RPM's bounced to the red line. It wasnt voilent or anything but just didnt serve its purpose. 3rd to 4th is much easier but id be speeding like a ************ to test that out

 

lol yeah I know what you mean. I have it even worse because my wife is pregnant so she about throws up when I hit the throttle more than 25% lol

 

^hahahahaha. omg the visual i just got. my gf was hammered one night and almost threw up in my car. I felt guilty becasue i was definitly being a dick about throwin up in my car