[KingLT1]

Originally Posted by ZLRob

Where in the trans settings of the tune file is the TM you are referring to? I want to see if mine has it enabled or disabled. I've always felt like my car lunges forward in the shifts.

If all torque management was disabled, you would see no timing reduction on the shifts in your logs. The master enable/disable is the Upshift torque reduction switch in the TCM. There are other things that can affect shift feel. Line pressure, air mass, minimum spark...etc.

[ZLRob]

Originally Posted by KingLT1

If all torque management was disabled, you would see no timing reduction on the shifts in your logs. The master enable/disable is the Upshift torque reduction switch in the TCM. There are other things that can affect shift feel. Line pressure, air mass, minimum spark...etc.

I just checked. That is disabled by default on mine. Might explain why I feel like the car is generally unhinged while I drive it. That and the increase in line pressure and my general tune being very aggressive. Looks like GM set the TQ reduction switch that way from the factory for the ZL1's. Hahaha.


I personally like it the way it's set up. it drives great. When I did my dyno day I actually found out that my set up has an 11.39% drivetrain loss, so the configuration is very efficient.

[radz28]

Can SPEED CONTROL TERMINATE affect shifting, too? That was my understanding.

[clj94104]

Originally Posted by Z OH 6

FBO with a stock blower and pullies? If so, I can buy that, maybe even a 2.3 upper. Anything beyond that and E40 is likely going to run into a fueling limitation around 640-650whp.

Yes. When I was FBO stock pulleys I regularly ran E50 as well, no issues. Car would take E60 but was told that is in fact the “hairy edge” and the tuner said it was playing with fire so I never did it. I don’t track the car though, rolls only.

[Z OH 6]

Originally Posted by clj94104

Yes. When I was FBO stock pulleys I regularly ran E50 as well, no issues. Car would take E60 but was told that is in fact the “hairy edge” and the tuner said it was playing with fire so I never did it. I don’t track the car though, rolls only.

Makes perfect sense. What doesn't make sense is the OP's car making over 700whp on E40 with stock fueling.

[KingLT1]

Originally Posted by ZLRob

I just checked. That is disabled by default on mine. Might explain why I feel like the car is generally unhinged while I drive it. That and the increase in line pressure and my general tune being very aggressive. Looks like GM set the TQ reduction switch that way from the factory for the ZL1's. Hahaha.


I personally like it the way it's set up. it drives great. When I did my dyno day I actually found out that my set up has an 11.39% drivetrain loss, so the configuration is very efficient.

Does your log show timing pull on the shift? If my memory serves me correct that switch doesn't do anything on 10l90's if you are still running a older version of HPt with the non enhancement A10 parameters.

[ZLRob]

Originally Posted by KingLT1

Does your log show timing pull on the shift? If my memory serves me correct that switch doesn't do anything on 10l90's if you are still running a older version of HPt with the non enhancement A10 parameters.

I'll have to take a look but I believe it is not set up to pull timing.

[Patriot Motorsports USA]

Originally Posted by Z OH 6

Makes perfect sense. What doesn't make sense is the OP's car making over 700whp on E40 with stock fueling.

It makes complete sense when you simply factor out the wasted fueling being used by the engine to make up for the differences in the engine's temperature from side to side. Once again, I do not make COLD Dyno pulls as they serve no other purpose than to make inflated numbers. I run the car on the dyno at the same temps I would be at the racetrack... this is what you do when building for reliability and repeatable results ON THE TRACK.

The graph I am looking at the most when we are tuning the car is seeing whether or not the engine is pulling any timing at all when shifting from 4th to 8th gear, so I can have maximum power on the long straights... everything else is bonus material and nothing more. Honestly it could be making 600whp and I would not care... again, the importance is the operation at consistent elevated RPMs under maximum load over a duration of time.

These outputs are exactly why we have a load-cell dyno so we can replicate how the car will react when its charging up a hill like we do from turns 8 to 9 at RA, or fighting the Esses at VIR when loading hard throttle to crack it like a whip to rotate the car then stabbing it again on the downhill to Oak Tree... being able to run the engine on a dyno to simulate these loads as we can help me have the consistency at the track. This is where I've developed what works, how the cooling will drop MATs as the speed increases and removes all the issues typically associated with a ZLE on track and heat soak, of which I have none.

All of this was triggered by two videos where I had a GoPro on the rear bumper back when my car was essentially stock and thinking the white puffs were smoke when actually they were streams of unburnt fuel coming out of the exhaust. One of which was three motorcyclists chasing me at Deal's Gap upon at the end, one rider said he could "taste" the fuel in his helmet.

In the beginning of this video at each shift you see a plume of raw gasoline coming out of the exhaust, and throughout the entire run at each shift.



Here is the video from the perspective of the third Motorcycle Rider in this group... his commentary is hysterical!



It was the information I learned from watching these two videos and others from the bumper GoPro that lead me to reach out to Gale Banks and begin looking for abnormalities in the fuel system, cooling and more.

Several have said that I cannot possibly get the power from just an Oil Cooler upgrade, and I beg to differ as you can view the video below from my AWE Switchpath Exhaust rear bumper GoPro and see zero fuel loss now. This video was made running E35% and its easy to hear how smooth the engine was, how crisp the shifts are and definitely its easy to see I can pull the C8Z06 with ease.

[ZLRob]

Originally Posted by KingLT1

Does your log show timing pull on the shift? If my memory serves me correct that switch doesn't do anything on 10l90's if you are still running a older version of HPt with the non enhancement A10 parameters.

It took me a few days mostly because I've been too lazy to hook up HPT lately, but I finally rechecked and I do indeed have TQ management in between shifts.

[Joshinator99]

Originally Posted by ZLRob

It took me a few days mostly because I've been too lazy to hook up HPT lately, but I finally rechecked and I do indeed have TQ management in between shifts.

If you didn't, you would DEFINITELY know on the street LMAO. I tried it... ONCE... my wife let out a loud squeal and I definitely tensed up lol as the car broke loose at near triple digit speeds on an upshift... I immediately went home and turned the TQ management back on haha! And that was with a few hundred horsepower less than I have now...

[djctoto]

Originally Posted by Patriot Motorsports USA

When I send Jeni out in the car to be on track she gets the car between 15-30% but when I was running with Vaughn and the GTD at CMP, I turned it up to 40% to pass him. Where I got greedy was with Billy Johnson driving the GTD, I added another few gallons and it hit 47% which ran like a raped-ape for a few laps til he out-braked me going into turn-1. What I think made the car hiccup was chasing him down and catching very little clean air behind him and at this point I had not realized the data which came a month later at Road Atlanta to short-shift the car.

Dan, E30% is a really safe place to be and it fulfills all the needed safety parameters for beating on the engine without any loss of power. I have also considered adding a BAP to spin the low side harder when the car is running Spicy, just to add measure.

The moral of the story is E47% on the hairy edge, E40% may be safe depending on conditions and E30% is really safe.

And the white car went out of your shop tuned to run E40% which is where you made the claimed power. But to be "really safe" the car shouldn't be run on E40%.
Makes sense

[ZLRob]

Originally Posted by Joshinator99

If you didn't, you would DEFINITELY know on the street LMAO. I tried it... ONCE... my wife let out a loud squeal and I definitely tensed up lol as the car broke loose at near triple digit speeds on an upshift... I immediately went home and turned the TQ management back on haha! And that was with a few hundred horsepower less than I have now...

At triple digit speeds? Holy hell. I probably would have let out a squeal myself if I was there.


They say that TQ mgt is implemented so the drivetrain doesn't break under shifting, but I also believe it's there to save us from ourselves while shifting too.

Originally Posted by djctoto

The moral of the story is E47% on the hairy edge, E40% may be safe depending on conditions and E30% is really safe.

And the white car went out of your shop tuned to run E40% which is where you made the claimed power. But to be "really safe" the car shouldn't be run on E40%.
Makes sense

E40 is childs play. Pump E or bust!

[Joshinator99]

Originally Posted by ZLRob

They say that TQ mgt is implemented so the drivetrain doesn't break under shifting, but I also believe it's there to save us from ourselves while shifting too.

I’m sure you’re right on BOTH points!

[Patriot Motorsports USA]

Originally Posted by ZLRob

E40 is childs play. Pump E or bust!

RIGHT!!! I raised the bar today at CMP and ran it up to E50% with zero issues!! My customer drove all the way to South Florida stopping along the way and keeping his blend Spicy at E40% cause he's addicted to the power and doesn't car about the MPGs.

We also toasted the brakes on the C8 as well today... it will be getting an E-tune soon!!