DameMD

Ok guys, I know there have been tons of threads regarding tuning for the c300 and c350. I decided to take the plunge and get a baseline dyno for the c350, and after dyno with OE tune. Stay tuned as we are tuning now.


Here's a teaser pic.

edgalang

dudeitsmattx

Rodpwnz

Since everyone else is posting emotions haha

xjaymzzx

if the c300s can achieve c350 powers. sadly, that is one of the great mysteries of our generation.

DameMD

ok guys...good news and bad news.


Good news:
Baseline dyno was done on a Mustang dyno. This dyno machine has the lowest reading out of all dynos; however, it is one of the most accurate dynos to measure actual power that a car is putting down on the streets (rwhp). That being said, my numbers look very low in comparison to getting a baseline from a Dynojet. Regardless of what dyno machine was being used, the point of the dyno was to see if we are getting said claims from OE tune. If you need more info on Mustang Dyno vs Dynojet please Google.

Ok now for numbers:

Stock baseline was: 214rwhp and 207rwtq
Dyno/OE tuned was: 223rwhp and 214rwtq


I picked up 9rwhp and 7rwtq. Peak numbers were a little higher and closer to the tuners actual claim in "mid-range"; however, 9rwhp and 7rwtq was pretty consistent across the board after about 2-3 runs. I have another appointment with the shop in a week to calibrate the tune after the ecu has adapted to my driving habits. This way, we can try to squeeze a few more rwhp + rwtq.

Bad news:
No graphs at the moment. The temps today were pretty hot in VA, along with the inside of the shop's garage being a little hot too. There are still some adjustments that need to be made on the tune, and after my week of driving/ECU adapting, we will do our final adjustments on the tune.

I know you guys want to see graphs with overlays and I will definitely publish the information once we finish the final updates. I will also provide my review of OE tune at that time. Meanwhile

ElJayBird

Wow...initial results are pretty disappointing

DameMD

I wouldn't say that just yet. What we must keep in mind is that these tuners are publishing"peak" horsepower & torque gains. Obviously, peak HP is not a very good measure because it only tells you about a maximum value and does not describe the overall performance of the engine. My shop was able to reach said claim of 23hp+ & 23tq+from OE tune but usable amount which I am looking for under the curve across the board was only 9rwhp. I think that's roughly 15+ crank useable horsepower.


Hopefully, when I go back to the shop, we can squeeze out another 3-5rwhp. That would be great to have 20+ useable horsepower across the board where I need it which is Low-Mid-Range.

TheRulesLawyer

What numbers are you quoting if not peak on your dyno run? Pick a random rpm? I understand that peak numbers aren't the whole story, but 9hp is pretty disappointing. If you're talking about tweaking the tune you must be doing this at a OE shop rather than mailing in your ecu as well. This is at IAP Racing it looks like, right?

What is your current peak before and after number? Its pretty impossible to talk about average area under the curve or pretty much anything else without the graph.

DameMD

Fair enough.

Yes, the shop is IAP. Also, you are correct that they are a in-house tuner for OE, which means I did not have to send off my ECU. I do not have graphs, as the shop did not provide them to me since the printer was down. As of right now, I am only going by what the shop told me was my stock baseline which was 214rwhp-207rwtq on a mustang dyno. With OE tune and only a few dyno runs and calibrations, we got to 223rwhp and 214rwtq.

Just to be clear, before this turns into another one of the many tune threads, I am only here to prove, or disprove these vendors with said claims of their tunes. Since no one on the forums has stepped up, I decided to take the plunge to get a before and after dyno of one of the vendor's tune. It's unfortunate that I don't have a graph to show at the moment; however, I "will" be going back to the shop to get final tune adjustments and I "will" report back to the forum with actual dyno graphs and printouts. I have to go back to the shop anyway to switch out my H&R Super Sport Springs with Sport Springs. Once the sport springs come in, I will be heading to the shop either on a Monday or Friday which are the only available "free" days for me.

FFM

And Mercedes claims these cars are at 300hp lol? That's some serious drivetrain loss if that's the case. Sheesh.

DameMD

In my first post I stated that the runs were done on a mustang dyno vs. dynojet. In comparison, the shop has a GT-R and on same mustang dyno was only showing high 300s for rwhp. These mustang dynos read very very low.


I know of a few dynojet shops near my house that I plan to go to after my tune is completed. I want to see comparisons on numbers.

FFM

Yeah I am aware of the different types of dynos. Used to live on dynos back in the day when I raced on a consistent basis. My user name is an acronym because I no longer promote ForceFed my old tuning business.

But damn, base hp claimed by Merc to even that mustang dyno is substantial. Makes me even more scared how much drivetrain loss would be with 4matic.

Guess I should dwell, we didn't buy this car for the power but maybe we should have opted for the 335 haha

TheRulesLawyer

The actual number matters a lot less than the comparison from stock to tuned. Dyno, gear they ran it in, etc all can contribute to low observed rwhp. Still, that's a hefty correction factor. 30% is way on the upper end even for a Mustang dyno. Make me wonder if they had the wrong ratio set in their software somewhere. I'd expect about 245 rwhp on a mustang dyno stock from the averages I've read.

TheRulesLawyer

FWIW the trap times I've seen on the net match fairly well with the rated HP on calculators.

FFM

Well that's good at least. But yeah when I saw 30% that's quite shocking. Even on dynos that read somewhat low. Granted there doesn't appear to be a lot of data to compare to here on the forums.

Regarding my E46 there's literally hundreds of dyno charts posted. Thus even though general rule of thumb is to never compare to someone else's chart, there's enough data to find an average of what to expect give or take.

zacweatherall11

how much KW it make ? on finial dyno

Sdalim