DYNO METHOD
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DYNO METHOD
On what gear the dyno operator dyno the car with 7 speed(c63,e63,sls63...),I saw it being done on 4th while the 1:1 ratio is on 5th,but on the 55 KOMP. they do it on 4th because that is the 1:1 ratio.what gives.
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Watch at 3.00m,it's done on 4th.
http://www.youtube.com/watch?feature...v=OmigydVawug#!
http://www.youtube.com/watch?feature...v=OmigydVawug#!
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SuperSprint does it with fifth gear,on 1.00 m start counting:
http://www.supersprint.com/en/doc-s-...80BA_dyno.aspx
http://www.supersprint.com/en/doc-s-...80BA_dyno.aspx
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
On baseline dynos (basically stock cars) they use 4th because the car runs into the speed limiter in 5th before it hits red line. The run ends at ~ 6000 rpm so you miss the peak numbers. After a tune it is still done in 4th to get comparable numbers. I have read that the readings may not vary much between using 4th or 5th gears. I think some dyno operators may be timid to run the car flat out in 5th as the speeds reached are quite high.
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As long as it is accepted method and disregarding the 1:1 ratio which is the optimum ratio,how come a car's power was 510 rwhp on 4th stock and after tune its 524 rwhp on 4th on a dyno jet.Am i being clear here.What i'm trying to say is if a car's power from factory was 5xx crank wouldn't it be lower on a dyno by 15-18% ?
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Some dyno operators report in flywheel horse power which they convert from rear wheel HP. I think Europe does this for the most part. Not sure why they do it or what factor they use to do the conversion. In NA most report in RWHP and convert to FHP using a factor of 18% if you wish an estimate of HP at the engine. Otherwise those numbers you have are not correct for RWHP on a stock or tune only C63. You will see 360-370 rwhp on a stock car and 420-440 on a tune only car. You will see higher and lower numbers reported but these numbers are about the mean and not the extreme.
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From: Ny
Anything W/4Wheels
I have another sheet in 4th gear that I did about 6minths ago with my mods now 465rw 
100rw gains from stock (minus race exhaust not being on)
100rw gains from stock (minus race exhaust not being on)
Last edited by mthis; May 5, 2013 at 01:54 AM.
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From: Doha, Qatar
2011 SLS AMG, 2009 SL63 AMG, 2008 C63 AMG(SOLD)
Do it in 4th Gear. 4th gear is close to 1:1. You will also be able to see the power curve until 7000+ RPM. On 5th gear the RPM hits below 7000 rpm. Therefore, do it on 4th
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From: Doha, Qatar
2011 SLS AMG, 2009 SL63 AMG, 2008 C63 AMG(SOLD)
Stock: 470 rwhp (Even though they usually dyno 480-485, our dyno reads a little lower than normal...)
Supersprint Headers & Xpipe: 507 rwhp (gain of 37rwhp)
Supersprint Headers & Xpipe + Custom Tune: 534 rwhp (gain of 27 rwhp)
Last edited by SLS Qatar; May 5, 2013 at 08:17 AM.
