waisoserious

Hi guys,

I am having trouble determining what a stock C43 should dyno at the wheel. I have seen anywhere from 269hp to 322hp. 269hp is way way too low, even with AWD and 322hp is definitely way too high. I thought previously I had read C43s dyno around 295-300hp but now I cannot even find that (cant find where I read that the 1st time).

Also I am considering Racechip. However, after mild research (Google/Youtube), I cannot find ANY Dynos at all. I see videos of people doing dynos, but not actual numbers. And if I did find numbers, it was always a mildly or heavily tuned car (tune, exhaust, downpipes).

Is there a reason I am having so much trouble finding a C43 Racechip Dyno (C43 with tune only)? The website advertises like +70hp. You would think it would be easy to find Dynos all over the place.

Thank you
Kenny

waisoserious

I am in Taiwan. The reason I am interested in racechip is cause they use a tuning box, instead of an ecu reflash.

Any ideas what the stock dynos should be?

threefirs

There are so many factors. Fuel, heat, more importantly dyno manufacturer.

I dyno'd approx 320whp stock on a dynojet. Keep in mind that MB under-rates their motors. They are making more power stock than they advertise.

Lazz83

Remember with 4 wheel drive dynos the numbers are going to be lower than actual Rwhp. That is why some dynos come up with the numbers in the high 290's.

I would put the number closer to 323 rear wheel HP, the stock engine has been dynoed at the crank, at 375hp by a number or reputable companies Renntech and AMR I believe, that is higher than the 362hp MB states.

I ran chips and ECU tunes years ago and the ECU tune is way better in my opinion, chips are old school, but ECU does cost more. I wish companies today would give you an actual ECU hand flasher, like Diablo Sport used to do, what if you wanted to put the tune back to stock? Send the ECU back to them and be without a car for several days, Pfffftttttttt on that- that is one advantage of a chip.

oldman&theC

You are correct about 4 wheel dyno's reading less,but that is because the C450/C43's are all wheel drive.They have more driveline loss's than RWD vehicles.So the lower readings are correct and should not be rated up to the RWD readings.

Also note that all dyno's only read wheel HP numbers.Any crank numbers are generated by mutiplying the WHP numbers by a factor.Not all tuners use the same factor.That is why you get higher or lower crank numbers from different tuners.the factors vary from 12 to 25%.Those using 25% will get much higher HP readings.

waisoserious

So AWD Dynos only read RWHP as well? No troll, just wondering if I am reading this correctly. I am familiar at all with tuning.

oldman&theC

All wheel dyno's read HP at all 4 wheels.I just wanted to point out if you have an AWD car you have more drivetrain loss's.You can't add more HP to the AWD readings for RWHP.Wheel HP is the HP you put to the road.It does't matter if it is AWD or RWD,it will always be less with AWD vs RWD because of the higher driveline loss's.

user33

No dyno, but there's some data at:
https://mbworld.org/forums/c450-c43-...er-anyone.html

loungn14

you aren't the only one lol.....

dboey

What gear was used for your Dyno? Some will say 3rd or 4th and other will say 6th to be more accurate. Care to share your thoughts.