C350 Dynoed
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
C350 Dynoed
Hey guys, So I decided I'm going to dyno my C350. I got an appointment for tomorrow at 1. This is the place whee I'm going to do it:
DSG - DENT Sport Garage - Self Built. A sport garage in Norwood, MA. USA
Apperently they have a Dyno Dynamics dyno (not that I know anything about dynos). So my question is, what whp should I expect from my automatic c350?? What would be a good transmission loss estimate to convert the number I get to crank hp??
Thanks
DSG - DENT Sport Garage - Self Built. A sport garage in Norwood, MA. USA
Apperently they have a Dyno Dynamics dyno (not that I know anything about dynos). So my question is, what whp should I expect from my automatic c350?? What would be a good transmission loss estimate to convert the number I get to crank hp??
Thanks
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
. In that case it would be more like 205 whp (not cool).
Super Member
Joined: Dec 2008
Posts: 624
Likes: 0
From: Belgium
S204 C220 CDI, VW Scirocco III 1.4TSI 160
MBWorld Fanatic!
Joined: Nov 2007
Posts: 1,423
Likes: 0
From: Phoenix, AZ
2014 Ghibli S Q4 & 2008 C350
Awesome! 
Do you mind if I ask what they are charging you? I've found a couple places around here for $75-100 for three pulls but they are dynojet dyno's and I've been told they are one of the least expensive/accurate dynos on the market?
Do you mind if I ask what they are charging you? I've found a couple places around here for $75-100 for three pulls but they are dynojet dyno's and I've been told they are one of the least expensive/accurate dynos on the market?
Trending Topics
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 19
From: Diamond Bar, CA
W206 PHEV AMG
18% loss on MB automatic is pretty much the norm. some where between 220-230rwhp depending on the dyno.
if you all really want to know what the car puts down without the variance of what wheels/tires you are running find a shop with dynapack. It'll be a more accurate 16-17% loss without factor in the wheels.
if you all really want to know what the car puts down without the variance of what wheels/tires you are running find a shop with dynapack. It'll be a more accurate 16-17% loss without factor in the wheels.
Last edited by FrankW; Apr 30, 2009 at 06:40 PM.
Member
Joined: Mar 2009
Posts: 139
Likes: 0
From: Carlsbad California
C350 and a Lightning.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 19
From: Diamond Bar, CA
W206 PHEV AMG
should be 3rd or 4th on the 7spd. probably the 3rd since the 6th and 7th are just overdrive.
Last edited by FrankW; Apr 30, 2009 at 09:26 PM.
MBWorld Fanatic!
Joined: Aug 2008
Posts: 2,257
Likes: 10
From: Los Angeles
2009 C63
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 19
From: Diamond Bar, CA
W206 PHEV AMG
I always thought the 1:1 ratio is used in the middle in most cases. edit: searched around and you are right. hmm....
Last edited by FrankW; May 1, 2009 at 04:53 AM.
MBWorld Fanatic!
Joined: Feb 2005
Posts: 5,761
Likes: 4
From: North Carolina
98 Black C43 , 12’ ML 350 Blutec
I'll say 205.....211 tops.
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
OK, I got the results. Again, this whole thing is new to me, and I just found out that HP is not so defined as consumers (me included) think. It really depends on a lot of things, especially the tranny loss and the dyno used.
Anyways, he did 3 pulls at both 4th and 5th gear; the results were very consistent with the 5th gear being 2 whp lower than 4th gear. The Max whp was 228. I was a little disappointed at first, but the tunner was kind of impressed.
He told me that Dyno Dynamics is a very realistic dyno that actually adds force to the wheels, and that on a Dyno Jet my numbers would have been around 10% higher. He said that as a comparasion, a manual E46 M3 is rated at 333hp and they have dynoed it at 270 - 275 whp, and that the difference from a manual to an automatic is always significant. When I asked to estimate how much power I had on the engine out of his experience he said at least 300HP considering the automatic transmision; this is close to what MKB advertises for their tune.
So the only way to know how much more power i'm getting is to get a stock C350 and dyno it on the same shop. I am left with this number wich doesn't really tells me much. I mean, I could be optimistic and say that 228 +10% = 251 on a Dyno Jet /tranny loss of 18% = 306HP. Or I could be more realistic and say that 228 / 22% tranny lost = 292HP (as suggested by AMS Performance). As the worst case scennario I can take the 228 whp / 18% tranny loss = 278HP
At the end of the day there is no definite answer. I'll post the graphs later when I get a chance to scan them.
Anyways, he did 3 pulls at both 4th and 5th gear; the results were very consistent with the 5th gear being 2 whp lower than 4th gear. The Max whp was 228. I was a little disappointed at first, but the tunner was kind of impressed.
He told me that Dyno Dynamics is a very realistic dyno that actually adds force to the wheels, and that on a Dyno Jet my numbers would have been around 10% higher. He said that as a comparasion, a manual E46 M3 is rated at 333hp and they have dynoed it at 270 - 275 whp, and that the difference from a manual to an automatic is always significant. When I asked to estimate how much power I had on the engine out of his experience he said at least 300HP considering the automatic transmision; this is close to what MKB advertises for their tune.
So the only way to know how much more power i'm getting is to get a stock C350 and dyno it on the same shop. I am left with this number wich doesn't really tells me much. I mean, I could be optimistic and say that 228 +10% = 251 on a Dyno Jet /tranny loss of 18% = 306HP. Or I could be more realistic and say that 228 / 22% tranny lost = 292HP (as suggested by AMS Performance). As the worst case scennario I can take the 228 whp / 18% tranny loss = 278HP
At the end of the day there is no definite answer. I'll post the graphs later when I get a chance to scan them.
Last edited by Bokx_350; May 1, 2009 at 03:48 PM.
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
MKB's ECU Tune https://mbworld.org/forums/c-class-w...ming-up-d.html
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 19
From: Diamond Bar, CA
W206 PHEV AMG
MKB's ECU Tune https://mbworld.org/forums/c-class-w...ming-up-d.html
MKB does make good tunes for MB.
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 430
Likes: 2
From: Boston, MA
C350
The tunner told me that the fule mixture was very lean at full throttle. He suggested that I compare this number to what MKB is supposed to deliver, but I'm not going to bother since I'm satisfied with the results anyways.
MBWorld Fanatic!
Joined: Aug 2008
Posts: 2,257
Likes: 10
From: Los Angeles
2009 C63
That's why dynos are at their best when testing differences...otherwise their are to many variables to ever know - 4th vs 5th, Temperature, Octane rating, Fan Setup, 18s vs 19s, +/- the variability of the dyno itself,etc. etc.
Congrats now you have a baseline for you're next mod
Congrats now you have a baseline for you're next mod
Last edited by BerBer63; May 1, 2009 at 05:33 PM.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 19
From: Diamond Bar, CA
W206 PHEV AMG
your AFR went from near 15 to dipping 13 at full throttle. I would be scared a little. only if you have the stock AFR to compare. 
wonder if that AFR is on the edge. I rather have them run a little richer and sacrefice a little power.
that's a board torque band tho 
wonder if that AFR is on the edge. I rather have them run a little richer and sacrefice a little power.that's a board torque band tho
