str8ridin

So, the last time I had my car on the dyno to get a baseline, it caused a little commotion in this community because my numbers were a little high for a stock car. Basically what happend, after three pulls, the last pull was 487RWHP/515RWTQ on Dyno Dynamics a few months ago.

Here is the thread if you'd like to peak at it.
https://mbworld.org/forums/w211-amg/...t-believe.html

So, I had the opportunity to re-dyno my car today at Carb Connection in Redmond, WA. organized by some friends from 6speedonline on a different dyno machine. It was about 22 degrees outside with a lot of humidity in the air (big snow storm about to hit!)

Anyway, I had to get in 6 pulls until I got consistent numbers. The last three being within 5HP/TQ of each other.

The best and last pull was 482RWHP/506RWTQ.



Notes:
I used Dyno mode, reset the ECU and did them in 3rd gear. I also got to drive. With the hood down, the first pull was somewhere around 421RWHP. Second and third were 436RWHP and 446RWP respectively. We then popped the hood and ran some high speed fans while letting it idle for a few minutes. The next three runs with the fan running were all around the 480+HP/500+TQ. It guess that is heat soak for ya and also what 22 degree humid air can do to our cars.

From the results alone, the car seemed to get progressively faster and stronger each time I punched it. Maybe the adaptive ECU...

Anyway, those are the new numbers and I do have witnesses.

Now, if only I can translate these in to the 11's on the track, I'll be 100% satisifed. Until I get some cooling mods, I'm going to throw these numbers in my sig since I've paid a lot of $$ to go to two different places/dyno machines to get the same numbers. Pending approval from people in this thread, of course.

Thericker

I'm still saying somethings fishy, get that sukka' down the 1320' I don't believe dynos anymore lol...Either that or your car has internal mods you're NOT aware of...

Also from your post 3rd gear on our auto 5 speeds is not the 1/1 gear to use for proper #'s 4th gear is the 1/1 gear your #'s will be slightly higher using 3rd, still not going to equate to 485 rwhp though I've never seen heat/soak change so dramatically from Norm 420's to adding 60+ rwhp the longer you run it on the dyno it always gets progressively weaker..I'm truly stummped..

str8ridin

Makes me wonder what resetting the ECU truly does. Imagine if heat soak wasn't an issue with the 55 and everybody was able to get 6+ pulls on the dyno. I hope someone else can chime in who had unlimmited pulls with our cars after resetting the ECU.

By the way, both times at the dyno I had extremely humid air and very very cold temps. These two things have helped our cars immensly at the track.

Timeless

These are also not SAE corrected numbers which will also be a good bit lower....but 485 uncorrected for a stock car is unheard of.

vegastrashed

It would appear that the Dyno Dynamics (DD) operator you went to during your first dyno session gave you Dyno Jet (DJ) correction numbers. Your current DJ numbers are almost in line with your previous DD. I know of one DD operator who convert the DD results to DJ numbers because he's tired of explaining to his customers why DD read lower than DJ.

mthis

would anyone know how much of a diff is yousing 3rd gear to 4th gear,

i know in my car its 5th gear 1-1 and my car in 5th made 375 and in 4th it made 365 thats 10whp diff but this is on a c63 not a e55.

also my car make about 10 whp more in dyno mode then with esp off

Ol'School

wow .. 485 whp !

platinumney

YEAH

Wryfox

Humidity is relative. Humid air at 22deg is still extremely dry and for example is only 7% of water content of 80deg.

My guess is you bought a modded car. You might still have cams and header. Easy stuff like intake and pulley may have been taken off.

You've got easily 50hp and 50 tq over any other stock car.

jamusa

I too believe that you bought a modded car...even some modded car do not make those numbers.

str8ridin

Some more info that I left off:

4th gear hits the rev limiter at 155mph, so that is why I had to do 3rd. Also, when the hood was partially down, the intake tubes were taken off because the dyno op needed to hook something up. That could explain the "hot" numbers.



I'm guessing that if any well taken care of E55 dynoed with the same weather conditions that I did, they would pull the same numbers if they kept it cool and had enough pulls. Just look at the last MIR event....favorable conditions let the E55's represent 11's all day long.

In the end, high numbers or not, these cars continue to amaze me.

str8ridin

If that is the case, then I got a deal.

How is my air/fuel ratio? Is that indicative of a tune?

Wryfox

Looks tuned, though the sensor went off track at 5800 rpm. Many stock dynos show much richer at high rpm, which MB programs to avoid engine damage. The fact that it tracks along the magic 12:1 at high rpm is a good thing for making power.

bassn_07

Either way, whether it's tuned or not you have yourself a strong car...congrats. I recently ran my car on the dyno and A/F was around 11.2 at full throttle. That seems a little rich but not sure if that's the target number for Cali's 91 octane gas...anybody have any input on this?

Gondon

Monster 55, Do you have an Iphone str8ridin?

str8ridin

No I do not, but I plan on borrowing friends with some variation of a dyno app....as soon as the snow melts! If that is what you were eluding to...

Gondon

Yeap, Just make sure to have it fully horizontal add your weight to the car weight DT loss at 18%-20%.

Zod

um that sounds like he hooked up the torq monitering tool, you can still fit back you intakes after that!

A test was done before on a dyno with them off and the car produces less power


Wishfull thinking but, highly unlikly as these cars are not new and many tuners & owners have gone through many 55k and non have produced stock what you have

either
you have a modded car that you do not know of. Check for headers. Should be easy to spot, if you look at the side of the engine, or lift the car and look under neither.

you have a freak from factory, but that would not make sence for it to have 60whp which is ruffly = to a stage 2 upgrade kit
nice numbers though congrats

Ohbev

bro your saying with out the heat soak you made more power at the wheels than the car has at the engine lol ?

prodigymb

solid numbers. they are high for a stock car, go to the track and the trap speeds will tell the story !