Drive Train Loss
08-12-2005, 08:03 AM
#1
MBWorld Fanatic!
Thread Starter
Drive Train Loss
...........i am going to dyno my g55 on a 4 wheel dyno that reads out HP at the wheels. What will be a reasonable estimate of the percent drive train loss on a W463?
Ted
Ted
08-12-2005, 05:24 PM
#2
MBWorld Fanatic!
Ted - I have no idea as to the answer to your question..... but I think that the concept of massive HP and Torque being sent to the pavement at all FOUR corners is pretty damn cool. 
Does the drivetrain on your 55 permit switching between 2wd and 4wd? If so, it would be interesting to see comparison dyno results.
Does the drivetrain on your 55 permit switching between 2wd and 4wd? If so, it would be interesting to see comparison dyno results.
08-12-2005, 07:46 PM
#3
MBWorld Fanatic!
Thread Starter
............it is permanent four wheel drive with lockable differentials. Hennessey performance engineering say thaey can "disconnect" the rear wheel. I do not know how this is done or if it is even possible. You may also be interested in this info below.
.......The 35% drive train loss used by G55K to generate the 530HP figure is likely to be incorrect because of the following results from my 2005 G55.
.........the car dynoed at 392HP and 444 torque at the wheels. The reason I'm asking is that, car and driver used a 35% drivetrain loss in the popular article comparing Kleemann G55 to a LPE Hummer H2. That Kleemann G55K dynoed at 384 Hp and 399lbft of torque and was converted to 530HP at the crank, using the 35% figure. https://mbworld.org/forums/performance-upgrades-tuning/82362-kleemann-dyno-results.html
This 35% figure seems quite high to me. if it were correct, it will mean that my 2005 G55 makes 603HP and 683lbft of torque without any modifications.
........to make matters more interesting, I then added a custom made pulley and Ecu. The HP figure went to 420 and torque went to 488. This will mean 646Hp and 750lbft of torque. I am not into exergerating Hp figures so I think the 35% drive train loss must be incorrect. This is why I am wondering what others might think is a correct figure for percent drive train loss.
Ted
.......The 35% drive train loss used by G55K to generate the 530HP figure is likely to be incorrect because of the following results from my 2005 G55.
.........the car dynoed at 392HP and 444 torque at the wheels. The reason I'm asking is that, car and driver used a 35% drivetrain loss in the popular article comparing Kleemann G55 to a LPE Hummer H2. That Kleemann G55K dynoed at 384 Hp and 399lbft of torque and was converted to 530HP at the crank, using the 35% figure. https://mbworld.org/forums/performance-upgrades-tuning/82362-kleemann-dyno-results.html
This 35% figure seems quite high to me. if it were correct, it will mean that my 2005 G55 makes 603HP and 683lbft of torque without any modifications.
........to make matters more interesting, I then added a custom made pulley and Ecu. The HP figure went to 420 and torque went to 488. This will mean 646Hp and 750lbft of torque. I am not into exergerating Hp figures so I think the 35% drive train loss must be incorrect. This is why I am wondering what others might think is a correct figure for percent drive train loss.
Ted
