Evo 9 GSR Gear Ratio Setup

Discussion and support for MoTeC's previous generation ECUs.

Evo 9 GSR Gear Ratio Setup

Postby jasonthai on Tue Jul 29, 2008 2:35 pm

Hi

I have a M800 OEM (version 89 adaptor with 3 connectors) for an Evo 9.

Does anyone know the correct Gear Ratio parameter set up for an Evo 9 GSR 6 Speed Manual Transmission?

I set up the gear ratios according to the factory brochure. I am using Digital Input for speed and using the tailshaft for calculation of the gears but it seems to miscalculate the gears. e.g 5th gear is shown as 6th,etc.

Any input would be really appreciated.

Thanks
Jason
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Re: Evo 9 GSR Gear Ratio Setup

Postby jasonthai on Thu Jul 31, 2008 7:05 pm

Managed to work out the problem by changing the ratios for gear 4,5,6.

FWIW, I am now using the following ratios:-

1 - 2.90
2 - 1.94
3 - 1.43
4 - 1.00
5 - 0.80
6 - 0.60
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Re: Evo 9 GSR Gear Ratio Setup

Postby aalzuhair on Mon Sep 01, 2008 8:33 pm

Jason,

What is the "Diff Gear Ratio" set to in Fuctions-->> Gear Detection -->> Gear Ratios

Az
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Re: Evo 9 GSR Gear Ratio Setup

Postby jasonthai on Fri Sep 05, 2008 1:54 pm

Hi aalzuhair

I am using 1.0 as the value. Sorry for the slow reply. Was out of town and didn't have my Motec program with me.

Regards
Jason
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Re: Evo 9 GSR Gear Ratio Setup

Postby MarkMc on Wed Sep 10, 2008 10:08 am

The Diff Gear Ratio is for when you are using a driven wheel speed sensor (one actually on the wheel) to work out which gear you are in. The calculated gear detection feature is a division of speed and engine RPM, if you measure gearbox output speed (as on the EVO) then you do not have the diff ration affecting the calculation, if you measured speed at the wheel this is obviously after the diff has done its RPM reduction so you need to take it into account.
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