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Old 10-10-2011, 02:50 PM   #1
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Default ECU settings and the dyno

Just curious.

Is anyone turning off certain settings when headed to the dyno? I know in tunerstudio there is a temp dependent timing retard. It doesn't matter what ECU, chime in with any ECU tips.
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Old 10-10-2011, 03:50 PM   #2
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ms3x still using the ideal gas law hard coded?
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Old 10-10-2011, 05:17 PM   #3
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Originally Posted by Techsalvager View Post
ms3x still using the ideal gas law hard coded?
You get to select how aggressive it is, but yes. You also get to use a MAT correction table. Then there is another table that relates MAT to CLT.

I won't step foot near a dyno again unless I have all of these working well. If you do, you will have wasted your money. The tune will change drastically with temp.

EDIT: On a side note, they need to have a MAT correction table for idle.
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Old 10-10-2011, 06:50 PM   #4
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the place i went had a crappy fan setup in front of the car, so i set it so the fans would be on pretty much the whole time
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Old 10-10-2011, 07:17 PM   #5
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I'm ready to tune spark on the dyno. However, the weather has cooled dramatically (thank God). Something tells me I'd prefer to tune spark on 91 octane when it is 110. Am I imagining things? Tell me I'm stupid.
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Old 10-10-2011, 08:04 PM   #6
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Originally Posted by hornetball View Post
I'm ready to tune spark on the dyno. However, the weather has cooled dramatically (thank God). Something tells me I'd prefer to tune spark on 91 octane when it is 110. Am I imagining things? Tell me I'm stupid.
I'd rather do it when it was cool (75), know that my MAT correction wasn't adding or subtracting anything ridiculous, and turn off MAT based timing retard.

I think if you tune while hot, and run a MAT timing retard you are going to be double dipping since the tune should compensate for the heat.

I'm hoping more of the experts will chime in. The whole point of this thread is to help people not waste money on dyno time due to their lack of tuning knowledge or lack of knowledge about their ecu parameters. You just can't rely on the dyno operator being an expert in your ecu.
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Old 10-10-2011, 08:05 PM   #7
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Originally Posted by aaronc7 View Post
the place i went had a crappy fan setup in front of the car, so i set it so the fans would be on pretty much the whole time
That's a really good idea.
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