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I had my C63 on the rack changing the rear diff fluid and thought it would be a good time to back it up a bit onto the dyno and get a base line run.
My car is a 2013 C63 Coupe P31 w/LSD. 1900 miles on it.
Dyno is a DynoJet 224xLC
After running the base line I remembered I bought a set of ROW air boxes from a member here and decided to install them and get an after run to compare.
The base line was a bit higher than expected, but it is what it is.
The ROW dyno was also a greater gain than expected. I really don't believe it was that much. The reason for this is the cross section of the air box area where the MAF is (the part that is different between the ROW and stock) seems to be bigger than the fresh are ducting to the air filter box. I would think that the ducting would be the point of greater restriction and the enlarged MAF duct would not make much difference.
Anyway the gain is clearly there.
Peak gain is 22.62 RWHP and 18.38 RWTQ
Maximum gain is 24.38 RWHP at 6726 RPM and 23.36 RWTQ at 4800
Road test is a definite seat of the pants increase.
Now, the big question I had was if there was significant amount of induced MAF Sensor Error. I connected a scan tool and looked for the difference in long term fuel trim deviation.
Steady 60 MPH
Stock +1 and -1 ROW +3 and +4
Idle
Stock +3 and +4 ROW +7 and +9
Seems that this is a very simple mod using OEM parts that actually increases power and there does not seem to be any negative side affects.
I do not rent dyno time, but if any of you are in the Southern Maryland area and want to do before and after dyno testing, contact me. If your project interests me we can strap it down and see.
I really want to believe this because I also put ROW airboxes on my car. And it was not to just eliminate the charcoal filter, it was mainly to have a full bell mouth on the MAF inlet.
I do believe that there is a gain, but if it's really this much, then I am ecstatic! Cheapest Horsepower you can have for the C63, since the ROW air boxes are only around $320 for the pair.
Did you reuse the stock air filters, or did you go with a K&N or AFE?
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
I like posts like this. Facts and figures are great. Although 22whp from ROW boxes sounds ridiculous, you backed it up with numbers. Great. Thanks for posting.
I'm new to MB and still learning my way around the car and this forum.
Do all US C63's have the more restrictive air boxes?
Even the Black Series and 507?
I'm new to MB and still learning my way around the car and this forum.
Do all US C63's have the more restrictive air boxes?
Even the Black Series and 507?
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Nice looking graphs. I already have the carbon filter delete and Weistec filters. Makes me want to try the ROW box tops. Did you take the carbon filters out or change the air filters before you put the ROW boxes on?
The base line results may look a little high but I have seen those kind of results before on a dynojet.
This makes sense to me
After reading the oe tuning blog a question I had been asking was answered
What accounts for the delta between the e63 and c63?
They limit throttling opening > 5000 rpm
What is 100% open TB on the e63 is less, say 90% (or whatever) even though the pedal is 100%
To get the same rated power with the row box all they did is limit it a bit more, say 88% or something
Same rating all markets
When the row box is put in the us car more air flows (the same as more throttle) and hence more power
The ecu parameters ( fuel, timing, etc) have enough headroom to compensate
So all the tune needs to do is de-limit the throttle and perhaps increase the air/fueling map some
2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Originally Posted by Manofsteelpt
428 is pretty high isn't it?
Gadget did say it was a baseline on his 2013 C63 Coupe P31 w/LSD. 1900 miles on it.
I agree it looks on the high side but conditions vary as do dynos and dyno operators. I have seen other P31 dyno results in this area on a dynojet. I guess a tuned car might show 15 - 20 higher on this dyno under similar conditions.
I know Renntech and Weistec sells or sold them at one point. I think Weistec is around $600
I was thinking about getting myself some but I passed I want to go to the driving school before I do much else to my car. Plus I have no self control once I get started.
I had my C63 on the rack changing the rear diff fluid and thought it would be a good time to back it up a bit onto the dyno and get a base line run.
My car is a 2013 C63 Coupe P31 w/LSD. 1900 miles on it.
Dyno is a DynoJet 224xLC
After running the base line I remembered I bought a set of ROW air boxes from a member here and decided to install them and get an after run to compare.
The base line was a bit higher than expected, but it is what it is.
The ROW dyno was also a greater gain than expected. I really don't believe it was that much. The reason for this is the cross section of the air box area where the MAF is (the part that is different between the ROW and stock) seems to be bigger than the fresh are ducting to the air filter box. I would think that the ducting would be the point of greater restriction and the enlarged MAF duct would not make much difference.
Anyway the gain is clearly there.
Peak gain is 22.62 RWHP and 18.38 RWTQ
Maximum gain is 24.38 RWHP at 6726 RPM and 23.36 RWTQ at 4800
Road test is a definite seat of the pants increase.
Now, the big question I had was if there was significant amount of induced MAF Sensor Error. I connected a scan tool and looked for the difference in long term fuel trim deviation.
Steady 60 MPH
Stock +1 and -1 ROW +3 and +4
Idle
Stock +3 and +4 ROW +7 and +9
Seems that this is a very simple mod using OEM parts that actually increases power and there does not seem to be any negative side affects.
I do not rent dyno time, but if any of you are in the Southern Maryland area and want to do before and after dyno testing, contact me. If your project interests me we can strap it down and see.
G
Do you remember what filters were used? K&N, AFE.... thanks
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