How many A8 guys have Superchargers
03-27-2015, 12:05 AM
#21
Drifting
You may be right but I wish someone in the know would get some solid specs from GM. I have done a good number of searches and can agree with the LT1 getting different clutches and torque converters than the Z06. I have seen that a number of times on legit sites. And this one from the GM web site "Unique clutch and torque converter specifications matched to the torque capacity of the Stingray’s LT1 6.2L naturally aspirated engine and the Z06’s LT4 supercharged engine distinguish the applications for the different Corvette models".
However, the 6L80 was rated at 440 lb/ft and a year later they released the 2007 Hydra-Matic 6L90 Transmission ( MYD )
rated at 530 lb/ft for the GM trucks.
The Stingray is rated at 465 lb/ft ..... so, if we add 11% to the 6L80, we are looking at 480 lb/ft.
Another quote from GM web site "Truck section"
The 8L90 was designed with 11 percent greater torque capacity than GM’s 6L80 six-speed automatic transmission, complementing the output of the 6.2L, which – at 420 horsepower and 460 lb-ft of torque – is the most powerful engine offered in a light-duty pickup.
The Trans-Axle Corvette 8L90 is different than the truck version a bit and I find this:
“The Corvette’s new eight-speed automatic delivers the comfort and drivability of a true automatic transmission, as well as lightning-fast shifts and the manual control that enhance the performance-driving experience,” said Kaveh. “It was designed to enhance the driving experience, with performance on par with dual-clutch designs, but without sacrificing refinement.”
What's my point in all this?
I think the Corvette 8L90 is very specific to sports car performance and not the same as the heavy duty towing capacity versions found in trucks. I have found NOTHING that confirms the Torque spec on the LT1 clutch/torque converter combo which differs from the Z06 version and believe it will be UNIQUE - not the same as the Truck version you mention. Again! Hope someone can find out for us.
But in any case, I think the LT1 version will hold the power I plan to use!
However, the 6L80 was rated at 440 lb/ft and a year later they released the 2007 Hydra-Matic 6L90 Transmission ( MYD )
rated at 530 lb/ft for the GM trucks.
The Stingray is rated at 465 lb/ft ..... so, if we add 11% to the 6L80, we are looking at 480 lb/ft.
Another quote from GM web site "Truck section"
The 8L90 was designed with 11 percent greater torque capacity than GM’s 6L80 six-speed automatic transmission, complementing the output of the 6.2L, which – at 420 horsepower and 460 lb-ft of torque – is the most powerful engine offered in a light-duty pickup.
The Trans-Axle Corvette 8L90 is different than the truck version a bit and I find this:
“The Corvette’s new eight-speed automatic delivers the comfort and drivability of a true automatic transmission, as well as lightning-fast shifts and the manual control that enhance the performance-driving experience,” said Kaveh. “It was designed to enhance the driving experience, with performance on par with dual-clutch designs, but without sacrificing refinement.”
What's my point in all this?
I think the Corvette 8L90 is very specific to sports car performance and not the same as the heavy duty towing capacity versions found in trucks. I have found NOTHING that confirms the Torque spec on the LT1 clutch/torque converter combo which differs from the Z06 version and believe it will be UNIQUE - not the same as the Truck version you mention. Again! Hope someone can find out for us.
But in any case, I think the LT1 version will hold the power I plan to use!
My understanding is the Z06 is rated at 738 but the A8 in the Stingray is not rated that high (Est 480+). I found some mention of it having a 11% increase over the A6 in the 2014 Stingray. I have not found any specs that actually relate to the 2015 A8 other than the one in the Z06.
03-29-2015, 08:50 PM
#22
You may be right but I wish someone in the know would get some solid specs from GM. I have done a good number of searches and can agree with the LT1 getting different clutches and torque converters than the Z06. I have seen that a number of times on legit sites. And this one from the GM web site "Unique clutch and torque converter specifications matched to the torque capacity of the Stingray’s LT1 6.2L naturally aspirated engine and the Z06’s LT4 supercharged engine distinguish the applications for the different Corvette models".
However, the 6L80 was rated at 440 lb/ft and a year later they released the 2007 Hydra-Matic 6L90 Transmission ( MYD )
rated at 530 lb/ft for the GM trucks.
The Stingray is rated at 465 lb/ft ..... so, if we add 11% to the 6L80, we are looking at 480 lb/ft.
Another quote from GM web site "Truck section"
The 8L90 was designed with 11 percent greater torque capacity than GM’s 6L80 six-speed automatic transmission, complementing the output of the 6.2L, which – at 420 horsepower and 460 lb-ft of torque – is the most powerful engine offered in a light-duty pickup.
The Trans-Axle Corvette 8L90 is different than the truck version a bit and I find this:
“The Corvette’s new eight-speed automatic delivers the comfort and drivability of a true automatic transmission, as well as lightning-fast shifts and the manual control that enhance the performance-driving experience,” said Kaveh. “It was designed to enhance the driving experience, with performance on par with dual-clutch designs, but without sacrificing refinement.”
What's my point in all this?
I think the Corvette 8L90 is very specific to sports car performance and not the same as the heavy duty towing capacity versions found in trucks. I have found NOTHING that confirms the Torque spec on the LT1 clutch/torque converter combo which differs from the Z06 version and believe it will be UNIQUE - not the same as the Truck version you mention. Again! Hope someone can find out for us.
But in any case, I think the LT1 version will hold the power I plan to use!
However, the 6L80 was rated at 440 lb/ft and a year later they released the 2007 Hydra-Matic 6L90 Transmission ( MYD )
rated at 530 lb/ft for the GM trucks.
The Stingray is rated at 465 lb/ft ..... so, if we add 11% to the 6L80, we are looking at 480 lb/ft.
Another quote from GM web site "Truck section"
The 8L90 was designed with 11 percent greater torque capacity than GM’s 6L80 six-speed automatic transmission, complementing the output of the 6.2L, which – at 420 horsepower and 460 lb-ft of torque – is the most powerful engine offered in a light-duty pickup.
The Trans-Axle Corvette 8L90 is different than the truck version a bit and I find this:
“The Corvette’s new eight-speed automatic delivers the comfort and drivability of a true automatic transmission, as well as lightning-fast shifts and the manual control that enhance the performance-driving experience,” said Kaveh. “It was designed to enhance the driving experience, with performance on par with dual-clutch designs, but without sacrificing refinement.”
What's my point in all this?
I think the Corvette 8L90 is very specific to sports car performance and not the same as the heavy duty towing capacity versions found in trucks. I have found NOTHING that confirms the Torque spec on the LT1 clutch/torque converter combo which differs from the Z06 version and believe it will be UNIQUE - not the same as the Truck version you mention. Again! Hope someone can find out for us.
But in any case, I think the LT1 version will hold the power I plan to use!
05-04-2015, 09:32 AM
#23
Le Mans Master
Thread Starter
Thats also what i been wondering about. If the A8 really could withstand a max 738 pound ft of torque i would probably spring for a supercharger in the near future. My biggest fear is installing a supercharger and having the transmission go out. I drive my car much harder then your average person! Wish we could have get a concrete number.
05-04-2015, 10:38 AM
#24
Drifting
Well, not sure what the specs are for the C6 A6, but it has held up just fine for my GS and many other blown C6's, so I'm pretty sure the A8 in the C7 will do just fine for normal blower levels.
As has always been the case, when you start to push the ponies then you also need to harden the rest of the drive train so higher HP applications may need different alternatives.
As has always been the case, when you start to push the ponies then you also need to harden the rest of the drive train so higher HP applications may need different alternatives.
05-04-2015, 12:33 PM
#25
Le Mans Master
Thread Starter
Well, not sure what the specs are for the C6 A6, but it has held up just fine for my GS and many other blown C6's, so I'm pretty sure the A8 in the C7 will do just fine for normal blower levels.
As has always been the case, when you start to push the ponies then you also need to harden the rest of the drive train so higher HP applications may need different alternatives.
As has always been the case, when you start to push the ponies then you also need to harden the rest of the drive train so higher HP applications may need different alternatives.
05-06-2015, 08:15 PM
#26
05-07-2015, 12:52 AM
#27
Safety Car
Why would you not want to do headers with a s/c? I'd think more air flow the better.
05-07-2015, 02:28 PM
#28
If you like the A8, try the Trifecta tune (calibrates both the ECM & TCM), especially with AFM de-activated. Wow!