Jacob-63

I recently modified a 2012 C63 AMG for my friend. it previously dynoed 450rwhp with an ECU tune + Supersprint headers.

Here is the previous dynosheet:


I added a 2.3L to it and the car just runs amazing. It beat a couple of modified 2013 Shelby Mustangs, some modified GTR's and a couple of ZL1's. I took it to the dyno. It was crazy hot. Temps were around 110F. I was really surprised to how well and consistent the beast dynoed in this hot weather. All 5 runs were close (within 10 whp difference from min to max).

The car does not have an Ice Tank, it did 572 whp, a gain of 122 whp from the previous dyno run on a hotter weather. I want to thank Weistec for calibrating this car with an amazing software tune as promised.

Here are the post dyno results after the supercharger upgrade:






Here is a short video of a dyno pull
Here are the conditions of all the runs, very undesirable conditions, but the engine was surprisingly consistent:


Here is a comparison graph between the previous runs and runs after the supercharger upgrade, a healthy whp gain:

Conv_GSDriver

What about torque? great gain btw, I don't want to ask how much $$ that set you back but great hp gain.

Jacob-63

Hi , thank you. The $$ are worth every penny.
We did not have an RPM pick-up. It wasn't working. That is why the X-axis in the dynosheets are set against speed and not RPM. We could only measure whp and AFR.
But from what I had previously seen with this upgrade ,the wheel torque produces between 530-550 lb/ft rwtq

mr747

Great result

Your video isn't working but

Kriston

awesome results! the gains are amazing.


The car must sound crazy.

OlegKouz

Amazing, the video isn't working for some reason though! Looking forward to hearing it!

Ingenieur

if you know the gear you were in the speed can be converted to rpm
with the rpm torque can be determined

T = 5252/rpm x HP (at that rpm obviously)

Ingenieur

computed for base dyno run

Final drive 2.65 Gear 4 1.37 Tire 2.083 increment 10 MPH
Speed MPH Speed FPM Axle RPM Engine RPM HP Torque
40 3520 538 1953 140 377
50 4400 672 2441 180 387
60 5280 807 2929 235 421
70 6160 941 3417 280 430
80 7040 1076 3905 330 444
90 7920 1210 4393 375 448
100 8800 1345 4881 420 452
110 9680 1479 5369 435 425
120 10560 1613 5858 440 395

Jacob-63

I'm sorry about that guys. I was posting from my Ipad. I just fixed it for you

mr747

ill look at this tonight

roadtalontsi

torque looks some what like this, only mine's from a mustang awd dyno which read lower. Stage 2 Weistec also. I've been trying to tell everyone the crazy torque these blower add, i think most just look at peak numbers. Instant torque, traction is rough at best.
2500rpm 470
2950rpm 500
3400rpm 510
3850rpm 520
4300rpm 534 - peak
4750rpm 520

peak whp was 538.

Ingenieur

here's torque from the OP's SC run

RPM Torque % Increase (from base)
2441 527 36%
2929 538 28%
3417 546 27%
3905 565 27%
4393 568 27%
4881 549 21%
5369 528 24%
5858 493 25%

this corresponds closely to the above:
above peak HP ~540
OP's ~ 570
6% increase would increase torque ~ the same 6%
above peak of 534 x 1.06 ~ 566 for the OP, very close

what tire size? I used 25" OD
and this gearing
Final drive 2.65
4th Gear 1.37

average joe

Great results especially at those temperatures.
An Ice tank will help a lot

As an example mine running stage 2 gave figures of 605WHP!!!! thats in the UK

Jacob-63

Thanks.

What headers are you running?

mr747

^^ Dont worry about dyno numbers man
There crap i went from one dyno at 335rwkw to another 295rwkw

as long as it smokes the tyres and pulls like a steam train your right to go

average joe

I am running IPE headers,

Also agree with post saying Dyno figures don't mean much.....however if you are running at high ambient temperature then anything you can do to cool the intake temp will help.

Merc63

The conditions of the run don't matter. This isn't the track where DA is very important.

What the car runs on a dyno, is what it will run anywhere in the world on the same brand dyno.

That is what the SAE correction does, converts the power to sea level.

SLS Qatar

+1. You are right

Except that for higher temperatures, like the above dyno run, the Knock sensors are effected, thus reducing engine performance and reducing whp. Therefore when you run the same car on the dyno in a cooler weather, particularly 60-50F, it will produce more whp figures, maybe 15-20hp more from what I had seen



I drove the car last weekend and raced a couple tuned CTS-V, ZL1, the new Corvette C7, and some GTR's. The car is just a pure animal and was beating everyone

Merc63

Should trailer the car or let it sit over night before dyno. These cars run hot and get bad heat soak.

I am hoping to get on the dyno soon. I just got a smaller pulley to try out.

mr747

^^^^ cant wait to hear those results

average joe

Are you installing wings to aid in takeoff.

Stage 3 with a smaller pulley

This will be epic.

RawBenz

+1

Heat soak is a f*cker with these!

I've noticed that with mine, there was a significant change in power on the dyno.

One figure was high (the day the car wasn't used much)

The other figure was much lower (car was being tuned all day, software tweaks, dyno runs/pulls)

The heat soak is incredibly noticeable!

Ice Tank is def the way to go aswell..

SLS Qatar

Yes!. The Ice tank really hepls in climates like the one we have in the Mid-East

SLS Qatar

Did you build your engine?

On the smaller pulley, are you changing the any of the other pullies? or your belt?

Merc63

The smaller pulley is a 60mm I believe, there is a 68mm on it now pushing 10psi.

The 60mm should hit 13psi.

I don't have a built engine, non-p31.

I'm only going to run it at the track, with race gas 105oct and with ice in the tank.

Going to test on the dyno to see if the car will adapt to it first though.

With the 60mm the stock belt will work I'm told, anything smaller needs a belt change.


I am bit nervous, we will see how it goes...