Weistec ECU Tune and Air Filters for my C63 BS
Senior Member
Joined: Sep 2010
Posts: 432
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From: BayArea, CA
2013 C63 AMG
Yeah, this is throwing me off as well, though I have seen some dyno data posted somewhere on the forums that seemed to back this up to an extent. Something about the actual hp at the crank of a c63 w/ p31 being more than the advertised 481, and in the graphs, showed it being nearly the same as their ecu tune applied to a basic c61. Hearing that it's not much different than the c63 BS is a bit surprising though... I'd really like to the graphs from a p31 vs BS comparison.
Senior Member
Joined: Sep 2010
Posts: 432
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From: BayArea, CA
2013 C63 AMG
Here's a video kind of demonstrating what I had read about somewhere previously. Anyway, this is why I'm wondering if it's worth getting a tune on my p31 c63 if it's not going to make much of difference. ~$2 for a tune is a lot if the improvement is extremely minimal.
Race 1 & 2: non-p31 stock vs. p31 stock
Race 3: non-p31 tuned vs. p31 stock
Race 1 & 2: non-p31 stock vs. p31 stock
Race 3: non-p31 tuned vs. p31 stock
Member
Joined: Sep 2012
Posts: 233
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From: Texas Hill Country
2020 AMG GTR
almost makes you wonder if those 1000 dollar tunes are simply a p31 map loaded onto your non p31 ecu.....that's steep....how much is a p31 ecu and can it be installed on a non p31 car?
MBWorld Fanatic!
Joined: Jul 2009
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From: PNW
'15 VW GTI
ECU costs about 1500, IIRC. Then it would have to be VIN coded to the car. That's where you would run into issues, since the computers in Germany would recognize that the car is not a P31.
Super Member
Joined: Dec 2011
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From: Edmonton alberta, canada.
Porsche 991 GT3, 2012 cls63 Kleemann K3
well, if the factory hp ratings are accurate, then the CBS(factory 510 hp) SHOULD dyno higher than the p31(factory 481 hp)
doesnt make sense to say the factory ratings of two different cars are 481 and 510 but they both dyno the same...
this would suck , especially if you have just spent the price of two c63's on one CBS.
Super Member
Joined: Jan 2010
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From: SoCal, Orlando/Miami FL USA, Japan
2012 C63 AMG BS, 2010 DUCATI 1198S
My BS stock put down 429-432 RWHP on 3 separate dyno's, on 3 separate days. Very consistent results. If we're using the 18% drive train loss rule, then that would put the BS at roughly 525 HP stock. MB typically under rates their numbers from what I've seen.
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Thread Starter
Super Member
Joined: Sep 2004
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From: NorCal
well, if the factory hp ratings are accurate, then the CBS(factory 510 hp) SHOULD dyno higher than the p31(factory 481 hp)
doesnt make sense to say the factory ratings of two different cars are 481 and 510 but they both dyno the same...
this would suck , especially if you have just spent the price of two c63's on one CBS.
doesnt make sense to say the factory ratings of two different cars are 481 and 510 but they both dyno the same...
this would suck , especially if you have just spent the price of two c63's on one CBS.
Member
Joined: Sep 2012
Posts: 233
Likes: 23
From: Texas Hill Country
2020 AMG GTR
so is the black over rated or is the development package under rated?
how about through a limited slip diff? those "can" rob some power and if the black comes with one and the dp car doesn't have on it can bring the rwhp closer but not 30 hp.....
how about through a limited slip diff? those "can" rob some power and if the black comes with one and the dp car doesn't have on it can bring the rwhp closer but not 30 hp.....
Senior Member
Joined: Sep 2010
Posts: 432
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From: BayArea, CA
2013 C63 AMG
I dont know that I'd call the BS under powered by any definition. It sounds more like the p31 has been under rated a bit. I'd still really love to take my p31 to a dyno the same day as someone with a BS to do a side by side comparison. If anyone in the Bay Area has a stock BS and would like to do this, let me know!
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Joined: Jan 2007
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From: Kuwait
CLS55 2006, CLS 63S 2015
I dont know that I'd call the BS under powered by any definition. It sounds more like the p31 has been under rated a bit. I'd still really love to take my p31 to a dyno the same day as someone with a BS to do a side by side comparison. If anyone in the Bay Area has a stock BS and would like to do this, let me know!
Member
Joined: Sep 2012
Posts: 233
Likes: 23
From: Texas Hill Country
2020 AMG GTR
Thread Starter
Super Member
Joined: Sep 2004
Posts: 632
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From: NorCal
I dont know that I'd call the BS under powered by any definition. It sounds more like the p31 has been under rated a bit. I'd still really love to take my p31 to a dyno the same day as someone with a BS to do a side by side comparison. If anyone in the Bay Area has a stock BS and would like to do this, let me know!
