MSgpio.com read only forums (Jan.15,2018)

Does anyone have an idea of what the 4WD speedo ratio is likely to be (so I can set the range in the INI file). The limits on the value are from 0.001 to 65.535 in the code (it is an int/1000), but I don't expect those possible limits to be used in practice of course!

Lance.

Lance,

This is going to vary with the transfer case design. The one transfer case I have data on, low range is 2.69:1 reduction. You'll need to make this a setable value via MT.

Marc

Marc,

Thanks Marc, I will set the default to 2.69:1 for now.

I realize it has to be user-serttable (it already is in the code and MegaTune), I was just wondering what the real world range is (like from 1.55 to 4.10, or whatever).

I hope to release draft code sometime in the next week or so, it will have the 2WD/4WD speedo switching, the variable resistance/voltage (Ford) based shift lever position detection, the 'clutch' outputs (that function only during a shift), and updates to the CAN scheme (to match Al's more efficient scheme that came out in the beta 3.1 code).

Lance.

Lance,

The range of transfer case low ranges are 1.96,2,2.61,2.72 the most popular for manual or electronic shift, new venture case.
2.48,2.74, 2.69 for the borg-warner case. and for the import 1.96,1.99,2.28,2.31,2.57. the aftermarket t-case can go as high as
6.00:1 that i have seen. there are possiblely others but these would be the most common, i hope this helps.


Brad.

Brad,

Yes, that's very helpful! I will set the range from 1.96 to 6.00:1, and the default at 2.69:1. Then I will document the possibilities you mention in the manual. (People can always extend the range by changing the INI file - they don't need to do anything to the code.) Thanks!

Lance.