Topic: no lift shift

[cbr6]

anyone ever use the no lift shift on their GXP? How do you use no lift shift?

[Steelmesh]

There are some folks who run it here I forget who. You'll need the WOT box https://zzperformance.com/products/n2mb-wot-box and bonus it has 2-step (exhaust explosions to spool up the turbo and scare the crap out of snowflakes).  I am borderline needing to go with a stand-alone ECU (will have these features built in), so I decided to hold off on it.

[LatinVenom]

Correct me if I am wrong, but I thought the GMPP tune gave you that feature at WOT.

[Steelmesh]

Correct me if I am wrong, but I thought the GMPP tune gave you that feature at WOT.

I think you're right with the LNF. I'm in the LE5 bubble, we're the ones who need the WOT box

[TomatoSoup]

Yeah it's a feature of GMPP and then other aftermarket tunes reverse-engineered it, so most have it now.

Basically, you plant your foot on the accelerator and keep it down then shift gears at ~6000+ rpm.  The ECM will retard timing during the shift to stop the engine over-revving.

I've tried it a couple of times, but it's not much use in normal driving.  Only if your dragging.

[Uranium-238]

Yeah it's a feature of GMPP and then other aftermarket tunes reverse-engineered it, so most have it now.

Basically, you plant your foot on the accelerator and keep it down then shift gears at ~6000+ rpm.  The ECM will retard timing during the shift to stop the engine over-revving.

I've tried it a couple of times, but it's not much use in normal driving.  Only if your dragging.

And this differs from bouncing off the rev limiter how?

Not trying to be stupid, just curious. Doesn't seem to offer much that traditional bang shifting with a rev limiter doesn't.

[TomatoSoup]

'Cos this maintains constant power, rather than pulling fuel and losing momentum across the shift.

[MattM]

It really does help alot! 

I had to get an n2mb WOT box to have the no-lift shift because my redline is a 2007 and the Trifecta tune doesn't activate the no-lift shift for 2007s like it does 2008s and 2009s. 

You can Definitely tell a huge difference when the no lift shift is functioning.  In between shifts (if I left off the gas) my boost drops to zero and it takes time to build it back up, but with no lift shift your boost doesn't drop much at all!  This helps maintain the power through the shifts, and is a big reason why the 1/4 mile time gap between a manual redline and gxp closes the gap with an automatic redline and gxp when you get the GMPP because an automatic doesn't drop the boost like a manual does. 

[Steelmesh]

It really does help alot! 

I had to get an n2mb WOT box to have the no-lift shift because my redline is a 2007 and the Trifecta tune doesn't activate the no-lift shift for 2007s like it does 2008s and 2009s. 

You can Definitely tell a huge difference when the no lift shift is functioning.  In between shifts (if I left off the gas) my boost drops to zero and it takes time to build it back up, but with no lift shift your boost doesn't drop much at all!  This helps maintain the power through the shifts, and is a big reason why the 1/4 mile time gap between a manual redline and gxp closes the gap with an automatic redline and gxp when you get the GMPP because an automatic doesn't drop the boost like a manual does.

There it is, Matt's fault he led me astray thinking the LNF needs the WOT box!!  *sarcasm alert* 

[Sol Asylum]

I could be wrong but I thought if you bought the right Trifecta tune (read that as not the budget tune) you could get NLS on an 07.

GMPP adds it across all years.

[MattM]

I could be wrong but I thought if you bought the right Trifecta tune (read that as not the budget tune) you could get NLS on an 07.

GMPP adds it across all years.

Yeah I def asked Trifecta before I got my tune about no lift shift on my 07.  Basically they said they couldn't put that on any 07 tune because GM didn't use a secondary electronic clutch pedal sensor (if I remember correctly) in the 07s that they did in the 08s and above..

[Kelu]

It's easy, no need for a tune to do it, LNF revs so slow so you can do it if you are fast enough and you will not bounce the rev limiter.

Just hit it, you will destroy the clutch anyhow

[Uranium-238]

I forgot y'all have boost to worry about, I'm so used to thinking NA...seems like there isn't much benefit to me, but you guys don't have to worry about lag this way.