Has anyone dyno'ed their C32 yet?
08-02-2002, 11:54 PM
#4
Out of eight C32s that we have dynoed, the range is from 270HP to 297HP. Every car is a little different. If you you are planning to do some mods, I would recommend doing stock dyno before. This way you know exactly how much power the mods have added.
Mine made 283HP.
Mine made 283HP.
08-03-2002, 05:25 PM
#5
SLK32 Parasitic Loss Calc, HP Torque too
I cut this from a discussion in a different forum (SLK32?) but lost the author, so my apologies to him. A good study on the Parasitic loss question and the Torque questions posed above. Also falls exactly into the center of the basket that Vadim presents. If you see say 288 at the crank you are good. Also of note the MB auto has a little bit better loss ( .21 vs .23) than expected by the dyno mfgr, this helps C32 owners out too.
BTW
349/1.21 = 288
...........
"We put the car in 'W' mode as Tim suggested and turned off ESP. Three runs were completed on my 2002 AMG SLK32 with approximately 1200 miles on the odometer. The tests were run on a 2001 model Mustang Eddy Current 4 wheel dyno. Here are the results using conversion factors of 123% and 121%, respectively (more on parasitic loss below):
First set are based on 123% wheel to crank conversion (aka parasitic loss):
Run#1 352 ftlbs 355 hp
Run#2 351 ftlbs 359 hp
Run#3 347 ftlbs 353 hp
Second set of numbers are based on 121% conversion factor:
Run#1 346 ftlbs 350 hp
Run#2 345 ftlbs 353 hp
Run#3 342 ftlbs 347 hp
How we determined the parasitic loss conversion factor (wheel output to crank output):
The 123% factor is a number that falls almost directly into the middle of % conversion factor (high 127% and low 118%) normally applied to a Mustang Eddy-Current Dyno and the 121% conversion factor was developed by dividing dyno wheel hp into manufactured stated hp output for each run and then averaging the results.
Averaging results of all runs for each conversion factor:
Now averaging hp and torque for all runs for each conversion factor, the average for 123% is 350 ftlbs and 356 hp and the average for 121% is 344 ftlbs and 350 hp. Manufacturer stated ratings are 332 ftlbs and 349 hp.
In all three runs max toque was reached at approximately 4500 rpm and hp at 5750 rpm.
I'll post the charts later if anyone is interested. "
BTW
349/1.21 = 288
...........
"We put the car in 'W' mode as Tim suggested and turned off ESP. Three runs were completed on my 2002 AMG SLK32 with approximately 1200 miles on the odometer. The tests were run on a 2001 model Mustang Eddy Current 4 wheel dyno. Here are the results using conversion factors of 123% and 121%, respectively (more on parasitic loss below):
First set are based on 123% wheel to crank conversion (aka parasitic loss):
Run#1 352 ftlbs 355 hp
Run#2 351 ftlbs 359 hp
Run#3 347 ftlbs 353 hp
Second set of numbers are based on 121% conversion factor:
Run#1 346 ftlbs 350 hp
Run#2 345 ftlbs 353 hp
Run#3 342 ftlbs 347 hp
How we determined the parasitic loss conversion factor (wheel output to crank output):
The 123% factor is a number that falls almost directly into the middle of % conversion factor (high 127% and low 118%) normally applied to a Mustang Eddy-Current Dyno and the 121% conversion factor was developed by dividing dyno wheel hp into manufactured stated hp output for each run and then averaging the results.
Averaging results of all runs for each conversion factor:
Now averaging hp and torque for all runs for each conversion factor, the average for 123% is 350 ftlbs and 356 hp and the average for 121% is 344 ftlbs and 350 hp. Manufacturer stated ratings are 332 ftlbs and 349 hp.
In all three runs max toque was reached at approximately 4500 rpm and hp at 5750 rpm.
I'll post the charts later if anyone is interested. "
