Thread: Transmision and Torque Converter Tuning discussion
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Old Wed, April 15th, 2009, 08:44 PM
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Jackpine Jackpine is offline
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Quote:
Originally Posted by cleatus12r View Post
DJ,

How about you use that fancy AE package you have and put it to use!

Here's what you do.

1. Drive in 3rd gear at 45 MPH; no load, not accelerating. Check the Mass Fuel Desired by what the datastream says.

2. Same test...only in 4th gear.


3. Use the MFD data and calculate over time and engine speed.

4. It's not the most accurate, but it may give you an idea.

I have a Genisys sitting here, but it's cold and snowing out.
Yes! that's a good approach Cody! (Your new avatar really creeps me out, you know - how does a guy with the friendly screen names of "cleatus" and a real name of "Cody" come up with such a sinister looking guy)?

Anyway, your approach is clearly the right one. At the "lugging" speed of 45 mph, which gear uses more gas? And, if the tune locked you into the "higher gas use" gear at that constant speed, then it's not the right one.

But, if you are accelerating, and lugging momentarily, do you get out of the high gas use region faster and with less fuel than if you downshift, then upshift again?

- Jack
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