ddtham

Hi folks,

I went to a local Dyno shop which has a Dynojet as they were having a Dyno Shootout for cheap. After 20 minutes or so of cooling down (35 miles of freeway driving), the car was strapped and ready to go. I put the car in dyno mode and the guy ran the car in 3rd gear (I keep hearing different things about this, should I have run it in 4th instead?).

My Stock C32 (Resonator Delete) was dynoed at the highest number of 296.38 RWHP and 294 RWTQ in 91 degree F and 4852 feet above sea level (that's Utah for you ).

My question is whether these numbers are close to what everyone else is getting? I will scan the graph tomorrow. Thank you!

TemjinX2

should be closer to 290whp but looks like you have a strong engine. 296/.82 = 360hp crank.

King320

dont dynojets tend to produce higher numbers?

c32AMG-DTM

Yes, I think it's safe to say "tend to" - but in the past year or two I've seen some low reading DJs and high reading DDs, so hard to say how this particular dyno is setup. A lot of folks seem to say "well your xxx numbers on a DJ would only be yyy on a DD" or vice versa, because they want to make relative comparisons; unfortunately it just doesn't work that way.

In isolation, the result looks high for a stock vehicle on a DJ, as Temjin points out - especially given the heat and altitude, which should both be power-killers. Is the OP 100% sure the vehicle is stock, though? An ASP 178mm pulley, or a C3P S/C pulley, is pretty hard to spot unless you know what you're looking for... hell most MB techs wouldn't even notice, I'd think.

The graph would be most helpful - were these figures uncorrected, corrected STD, or corrected SAE? The SAE figures are what most use for comparisons, AFAIK. What octane do you run in UT?

Overall, looks to be a healthy beast - enjoy it in good health.

ddtham

[QUOTE=c32AMG-DTM;4128180]Is the OP 100% sure the vehicle is stock, though?

The graph would be most helpful - were these figures uncorrected, corrected STD, or corrected SAE? The SAE figures are what most use for comparisons, AFAIK. What octane do you run in UT?QUOTE]

Thank you for your great feedback! The car is 100% stock as far as I know. My sister purchased the car 6 years ago from MBCPO I believe. But then again they might not have caught any pulley upgrade. Is there a way to detect pulley upgrade? I was searching for any distinct marking on the crank and SC pulley but it didn't say anything.

We only have highest of 91 Octane in Utah... Sad really...

Thanks Temjin! I have attached the graph for further info:

The graphs were from the first and fourth runs. During the second run the car shifted gears and the third run was ran in 5th gear so no go there. He also mentioned that the car might have heatsoaked a little during the fourth run.

Did it make a difference that the x-axis mentioned Vehicle Speed on MPH instead of Engine Speed (RPM)?

mikekuriger

don't worry about the numbers. the true usefulness of a dyno is for tuning. doing multiple pulls while tuning and monitoring a/f will give you all the info you need. the actual number is not important. the same car will make different numbers on different days or on different dynos. I use the dyno for tuning and seeing the difference between mods.

c32kompressor

i dynoed at 330.2whp, could i have an asp pulley? and how could i tell?

SETSEROCK

You should ask them for a copy of it in RPM. Most shops will have a saved file of your run(s). It's just a click of a mouse for them to change it (or you can do the math yourself to convert it if you know the gear ratio/ final drive ratio).... RPM is much more relavent.

Do you have any idea what your peak torque numbers were?

TemjinX2

just measure the crank pulley. the asp is 178mm the let is 185mm

TVT_DESIGN

Time to get a pulley!

ddtham

Thanks Mike, that's what I figured. There are too many variables in dyno pulls. I was just wondering if the numbers are on par with other C32s. At least the dyno served its purpose and I can start planning my mods accordingly.

My peak torque was 294.

MBH motorsports

You're right in line with where you should be for a stocker.

c32AMG-DTM

Thanks for sharing the graph - quite helpful. See where it says "SAE 1.20" etc.? It is applying a correction factor, given your weather and altitude, to align the results within SAE spec. 1.20 is one of the highest I've seen; then again, you're at pretty extreme altitude. AFAIK, this means you're really making ~250 rwhp in actual output, because of the adverse conditions.

If the dyno shop keeps the files, you should call them and ask them to email you the raw WinPEP data. Then download WinPEP7 (a free program) and you can view and archive all of your runs to your heart's content.

Either way, a big "plus 1" to mikekuriger's post above - this is just one data point to help you later on.

W203E35

Do you know any reputable shops in SoCal where I can get a good Dyno Tune? Heard about Mike's (temjinx2) experience and I don't want to deal with shady tuners.

Thanks

CLKCLK

I am really interested in your C600. Please post more pics and what is your 1/4 time?

thanks,

W203E35

It's a 2006 C350 Sport with Kleemann Headers, Remus Exhaust and some DAS tweaks. That's not my car, the sig is a joke and so is the Audi lookalike w203.

ddtham

Since the thread went from C32 dyno to C600, I might as well add what happened today.

I was driving the old beater (C280) all day today, just to see how it runs after water pump and thermostat housing replacement. Nonetheless, I miss the 32 already so I took the 32 to go to a late meeting for work in Mexico.

I was minding my own self, when a nice Alpine White E46 M3 rolled up and jumped at around 30 MPH on me and pulled a full car length. I gunned it and at around 70 MPH I started catching up, but had to brake because of traffic (damn traffic in Mexico...).

I gave the guy thumbs up and he waved and followed him to go onto a one lane on-ramp on a deserted highway. He gunned it again and I gunned it as well up to 80 MPH and semi-rode his tail. He tapped his brake and I braked as well because of an Impala that looks like la policia's car pulling up beside us

I pulled next to the M3 and we both laughed. This time he downshifted (I think it's an SMG) and we both went from 50 MPH to 95 MPH. And to my surprise, I didn't pull on him!

We were neck to neck all the way to 95 MPH. He took his exit and we both waved and smiled (nice guy), I forgot to ask if he was stock. I was actually very surprised that I did not pull on him during that short burst of run.

My mods are EC 185, EC Jerry Tune, C3P Intake, Resonator Delete, CM30, NW PSK, NW ISO and Toyo R888 rear tires (very grippy). I also turned off my ESP.

It makes me curious on what kind of mods he has, as I pulled on lightly modded E46 M3s (6M) when I was stock before. This one sounds kind of whiny (or is it my own SC whine playing tricks on me). I know SC M3 would kill me like no other, but what do you guys think?

The temperature was around 90F, heatsoak maybe?

I was going to get my dyno for AFR and numbers after the mods last week, but it wasn't successful. So, hopefully I get a dyno this week and see how my numbers compare. However, my trusty butt is telling me it's a lot faster at all rpms.

TemjinX2

if you don't have the heat exchanger..then i would say heat soak. I have the same mods as you and I dust e46 m3's..at least the non FI ones. I agree if he was SC he would leave you..i'm pretty sure there putting down close to 400whp.

I raced a e46 m3 in a highway in mexico...i let him have a fender length lead at 65mph roll and then gunned it. Right when i gunned it his lead was completely gone and i kepted pulling past him.

ddtham

Hi Mike!

Is our heat soak really that bad? I know that the car feels faster when it's cool outside or just barely heating up (around 80 C). But I can't believe that all the mods are negated by heatsoak? Actually I checked my Engine Temperature and it's close to 100 C right after the run to 95MPH. I really need an OBD reader to check on IATs.

My EC HE is coming soon! I am just waiting for shipment right now.

On the other hand, I raced a lifted diesel pickup on last Saturday night in Mexico... again... I know that some of those trucks are crazy fast and I thought I would get killed from all speed. The guy brake torqued the truck from a dead stop and I heard the turbo spools. Nonetheless, the race is over when I hit 50. And they told me "I bet we can smoke you if we get the jump" I let them jumped for a second and still pulled them badly. This is when they started driving like a lunatic and I called it quit

TemjinX2

well its not really the engine temp you have to worry about its the IAT. Running that much boost, the air gets really hot really fast, so the ecu starts to pull timing to compensate. Then you lost power as the ecu pulls more and more timing as the air heats up.

With trucks, some of those diesel trucks can be crazy fast. But in your race it was probably tq vs hp. The truck has more tq and you have more hp. So you start to pull as hp starts to take over.

ML500K

HE is a must with the 185 pulley, IATs can jump from 30 degrees to 60 in a matter of seconds. (celcius) without the HE it will keep rising and pull timing before you know it :-)

ddtham

I have done plenty of reading about heat soak and I almost can't wait for my heat exchanger to come from EC!

On a side note, I guess the car still runs strong even with the heat soak and beat likely stock M3s

It is true that the car runs a lot stronger when I just barely heating it up. I also noticed that after I installed my 185, the garage temperature is a lot hotter when I left the hood open after driving! The garage feels like a freaking sauna compared to when the car was stock.

Thanks Mike (TemjinX2) and ML500K for your helpful insights! ML500K, how do you like your Innovate LM-2? I am also thinking about running wideband and trying to shop for some good products.

ML500K

i only had the LM-2 wired up for tuning, once my tuning was finished I removed it. The cable is still in my car so when i do do other mods i can quickly hook everything back up. One thing I found "lacking" was that our ECU can only put out a number of diagnostics per second. I think it is like 8cycles/sec. So in order to get a better reading, i only logged two attributes per run, such as RPM and vehicle speed. So i could get 4 cycles per/sec/parameter. AFR is recorded by default cause it gets the info directly from the sensor near the headers. then i run a combination of timing fuel trim etc... and can conclude from the mods i have, fuel is not an issue.

Some examples from the LM-2:

1st file(session7): This is a run from a dig to about 112mph through 3rd gear. AFR looked pretty good. Just where we wanted it at. As you can see in the following chart, afr went a bit higher to 14. So load and vehicle speed makes a big difference in tuning imo.

2nd file(session9):test out some top end tuning
Here you will see from 5200-5600 rpm the car runs a bit lean hitting 14:1 AFR.
this was a 4th gear pull from about 96mph to 143mph. ( wanted to go all the way to 5th gear but saw in coming traffic )

so answer your question, i personally liked the LM-2 for its simplicity cause i could tap into our car's ecu via OBDII to get other parameters. If you wanna go hard core you can also tap into the car directly and run the lines to the LM-2. ( like rpm )

TemjinX2

14.1 seems high. I know the newer motors can take leaner conditions but i would get it down to at least a 12.5 at 6200rpm.

ML500K

indeed! I have a file that runs richer but i reserve that for highway runs. This is my DD and i hardly go over 100mph in the city. When i do get around to delete the primary cats, i'll probably have to retune the car...