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Go Back   REVscene Automotive Forum > Technical Discussion > Advanced Forced Induction & N/A Engine Tuning

Advanced Forced Induction & N/A Engine Tuning This forum is brought to you by Racing Greed in Port Coquitlam.
Supercharger vs Turbocharger vs NA? Hondata vs Megasquirt? 94oct vs 87oct? Through technical discussion, let's find out what will the best option for you...

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Old 09-20-2009, 03:54 AM   #76
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well this dyno consistantly gives low #'s
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Old 09-20-2009, 08:18 PM   #77
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Yes, we've calibrated our dyno to the recommended specs from the manufacture. Obviously lower numbers aren't good for bragging rights, but we are using it as a tuning tool not just for numbers. A lot of companies modify there parameters to match dynojet #'s. The dynojet is a nice dyno for wide open throttle peak numbers, because they are inertia based water loaded dyno's. For tuning a car properly you need a steady state dyno like ours which can lock the rollers at any speed so you can tune all the load cells.
We've tested some cars back to back on our dyno versus the dynojet and the differences have been between 11% to 15%. 11% on lower hp cars making up to 300whp and 15% on cars making over 400whp.

So for the 63 AMG making 310rwhp, if you take into account that it has 17% drivetrain loss (estimated) and that our dyno reads 11% lower then actual whp, works out to around 431hp at the crank which is pretty close to factory rating.
Modern ecu timing/fuel maps are not very consistant. They are constantly adapting and adjusting for environmental factors and fuel octane levels. I have not doubt that after a couple runs in cooler temps the ecu would start to add some timing and it would make the 450hp at the crank.
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Old 09-20-2009, 08:31 PM   #78
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Here are some vids from the dyno day:

Tomas's S14.5 KA-T:
[youtube]I1gP5wEzeqY[/youtube]

Mark's R6:
[youtube]VCBfgQDuRoY[/youtube]

Lotus Exige:
[youtube]ifRGhLFYCg8[/youtube]
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Old 09-20-2009, 08:37 PM   #79
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Originally Posted by RacingGreed View Post
Exactly right. A steady state dyno is an awesome tuning tool. The numbers themselves don't mean as much as the before and after when tuning. The mph at the end of the quarter mile is what counts

thank you RG for your awesome tune. my power band was every where now after the tune its insane!!!!
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Old 09-20-2009, 10:24 PM   #80
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your car look sick!!! time for k-series swap???
When he has 10g's, then he will have that thought. hahaa
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Old 09-21-2009, 12:33 AM   #81
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whoa, the r6 guy's foot was damn close to the roller.
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Old 09-21-2009, 06:52 AM   #82
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how much power from the lotus?
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Old 09-22-2009, 09:51 AM   #83
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The Lotus made 170rwhp. good for a light weight car.
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Old 10-13-2009, 02:39 AM   #84
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damn cant believe i missed this. ill be back at rg soon for another dyno. very good guys.
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