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      09-13-2014, 06:32 AM   #1
le rafiot
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Dyno stock and jb4 stage 1

Very happy
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94 oct
And weight car is 3490 lbs with 1 gallon gaz
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      09-13-2014, 06:42 AM   #2
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Manual or DCT?
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      09-13-2014, 07:15 AM   #3
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dct
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      09-13-2014, 08:30 AM   #4
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Does that say 448 ft/lb stock? It's blurry?
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      09-13-2014, 08:39 AM   #5
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How much boost? AFRs? Is Runfile 01 stock?
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      09-13-2014, 09:21 AM   #6
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Originally Posted by MaynardZed View Post


Does that say 448 ft/lb stock? It's blurry?
yes
Cold day and 94 octane
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      09-13-2014, 09:22 AM   #7
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How much boost? AFRs? Is Runfile 01 stock?
yes run 1 stock and 3. jb4 stage 1
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      09-13-2014, 09:40 AM   #8
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Why the torque is too low at lower RPM?
I thought S55 generates almost constant torque between 1500-5500 RPM!
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      09-13-2014, 09:49 AM   #9
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Quote:
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Why the torque is too low at lower RPM?
I thought S55 generates almost constant torque between 1500-5500 RPM!
It does produce pretty even torque, once the turbos are spooled up. This, in combination with the fact that most dynos/dyno operators don't start the run at 1k rpms, but usually start it about 2-2.5k rpms, means that the turbos don't spool up right away, which means that max torque is not generated for about 300 rpms or so after the dyno operator gives it full throttle. So, 2.5k rpm start plus 300-500 rpms of spool time, means that max torque is not hitting until somewhere around 2.8-3k rpms. If the dyno operator floored it at idle, it would look different. Not sure I have even ever seen a dyno run that started at 1000 rpms, though.
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      09-13-2014, 09:57 AM   #10
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Quote:
Originally Posted by M6-Coupe View Post
Why the torque is too low at lower RPM?
I thought S55 generates almost constant torque between 1500-5500 RPM!
I think that most of these cars have been dyno'd from roughly 2,5-3k and above. Isn't that true also for the S63 graphs?

The Sport Auto MAHA dyno graph is only representative from 3100rpm and up. It's very clearly not a full power run at low rpm's
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      09-13-2014, 10:16 AM   #11
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clean picture
sae and std
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      09-13-2014, 10:17 AM   #12
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      09-13-2014, 10:24 AM   #13
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Quote:
Originally Posted by Dave 90TT View Post
It does produce pretty even torque, once the turbos are spooled up. This, in combination with the fact that most dynos/dyno operators don't start the run at 1k rpms, but usually start it about 2-2.5k rpms, means that the turbos don't spool up right away, which means that max torque is not generated for about 300 rpms or so after the dyno operator gives it full throttle. So, 2.5k rpm start plus 300-500 rpms of spool time, means that max torque is not hitting until somewhere around 2.8-3k rpms. If the dyno operator floored it at idle, it would look different. Not sure I have even ever seen a dyno run that started at 1000 rpms, though.
Quote:
Originally Posted by Boss330 View Post
I think that most of these cars have been dyno'd from roughly 2,5-3k and above. Isn't that true also for the S63 graphs?

The Sport Auto MAHA dyno graph is only representative from 3100rpm and up. It's very clearly not a full power run at low rpm's
Oh, ya... you are right! Thanks for clarification!
BTW, OP looks like your car is generating power/torque close to M6 stock
I wish you were local, then we could do some runs
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      09-13-2014, 10:33 AM   #14
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1/4 mile 5-6 mph faster stock vs jb4
but traction no good
better tire needed
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      09-13-2014, 10:35 AM   #15
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http://f80.bimmerpost.com/forums/sho....php?t=1035015
very bad Time
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      09-13-2014, 02:16 PM   #16
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Good gains
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      09-13-2014, 02:31 PM   #17
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Impressive gains and thanks for sharing both the STD and SAE graphs
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