SoCalC55

312rwhp/328rwtq
Dynojet Model 224x
12:54pm
Humidity 23%
75*F

I'm quite happy with those numbers stock, now if only I could afford to mod it







Short Video
http://www.motorgen.com/vid/showphot...1/limit/recent

c32used

nice stock numbers

saer1one

312 huh.. nice .. wut are stock numbers for a c32..?

moosejaw

Stock i was 306 hp
Turbo16lbs was 317
04blackc32 was 307

But this was in south florida with warm temperatures and high humidity. Keep in mind, these cars perform better with every dyno. So your third run will be your best.

ProjectC55

Could you post your AFR. Thanx!

Biscuit

I put down 296.7hp, 289.05tq.

https://mbworld.org/forums/c32-amg-c...sults-c32.html


Congrats on the numbers, Mr. Special.

SoCalC55

Someone else on the other site asked about that, and to be honost i dont think they were monitoring A/F ratio

hkycoldrct

Did you take it somewhere local to Dyno it? I'm one exit east of you in A.H.. Maybe I'll see you zooming around town sometime!

Biscut, nice stock numbers!

SoCalC55

Place off the 5/605 freeway. I went with a local car forum and we got 3 runs for $45.

I'll have to keep my eye out for a 32

TemjinX2

oh nice...was it that dyno day at that one place in dowey? i was going to go to that but i was tired from our gmr cruise.

Quicktwinturbo

Thats a healthy C55.. Well done!
Mine was lil over 300rwhp.

CLKCLK

It seems like the color makes the power Black is stronger then silver jk....

billapex

So, my question is, is the driveline in the C55 super efficient, or is the motor actually making more than the rated 362hp?

I typically use 20% as a good driveline loss figure for an automatic. At that percentage, your rwhp would be 290. With your number, and using 362 flywheel hp, driveline loss would be only 14.5%, which is extremely efficient. Or, with 312rwhp and 20% driveline loss, your car is actually making 390hp at the crank.

Anyone have any insight into this?

Bill

HLG600

His car would be making roughly 375 crank horsepower using the standard 20% loss estimate for a car with an automatic transmission. Not sure where you got 390 from?

billapex

312rwhp divided by 0.8 = 390hp at the crank.

Doing it the other way, 390hp at the crank x 0.8 = 312rwhp.

HLG600

I was under the assumption that 1.2 x 312 = 374.4 was more accurate. To verify:

0.2 x 312 = 62.4

62.4 + 312 = 374.4

TemjinX2

i agree with hlg600 multiplying by 1.2 is more accurate. Dividing by .8 is the same as multiplying by its recepical of 5/4 = 1.25

(312 / (8/10) ) = 312 * (5/4)

so your adding 25% not 20%

rockjock

Figure 15% on RWD/FWD, 20% with AWD and I've been "close" most of the time (as another poster stated-diff dynos will show diff #'s)-good work on the #'s-is it bone stock (oil and all?)-thats good news for us newbies looking to mod.

TemjinX2

i would say fwd would be closer to 15% then rwd. There's more drivetrain lost rwd because of the transaxle. awd for obvious reasons.

billapex

My formulas are correct and are the industry standard. Trust me--I owned and operated a Dynojet for almost 8 years.

rwhp / 0.80 = estimated flywheel hp with an automatic.
rwhp / 0.85 = estimated flywheel hp with a manual.

-or-

Rated flywheel hp x .80 = estimated rwhp with an automatic.
Rated flywheel hp x .85 = estimated rwhp with a manual.

Bill

TemjinX2

alright, i'll take your word for it. i'll like taking the higher number anyways...

xplosiveg06

dang, impressive dyno numbers shawn.


btw, hit me up on facebook for the local meets. i dont have reception at my house and always get ur texts a day late