True Engine Specs
Thread Starter
Racer
Joined: Dec 2005
Posts: 431
Likes: 0
From: North Las Vegas Nevada
True Engine Specs
Does anyone know if GM measures the HP & Torque for our motors at the crank or behind the tranny? In my owners manuel it states that my torque is 370 with a manuel tranny and, I think it was 350, with an Auto.
I was just curious!
Thanks!
I was just curious!
Thanks!
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Originally Posted by allmee
If it is at the crank. then why would my torque differ from an auto transmission?
Le Mans Master
Joined: Jun 2004
Posts: 6,269
Likes: 50
From: Dallas Texas
St. Jude Donor '06-'07-'09-'10
Originally Posted by FFR-Z06
Because you'll lose more going thru the auto as opposed to the manual trans
It's torque converter loss. The only cam difference is between LS1 and the LS6. 
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Originally Posted by chriswtx
The manual either has a different cam profile or a different tune in the computer...
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Melting Slicks
Joined: Feb 2001
Posts: 2,800
Likes: 356
From: Northville, MI
The A4 trans has the torque management settings to keep the torque under 350. GM did that for longevity of the trans. If you want to maximize performance, you need to run a scan log of the TM under normal, passing and max performance--both in the up shift and downshift. A good tuner will adjust the TM limits to increase the acceleration without pulling all the advance when it shifts. Beware of tuners who just want to eliminate TM altogether--setting to 650 ft lbs--without building up the trans and adding TC and shift kits. Corvettes are not to hard on the trans in stock conditions but when the engines are modified, they tend to break.