Wilcap Slant Six to 200R4 conversion

the_engineers said

A few of issues beyond the issue of physical fitment. First gear is way too low...people complain about the 700r4 which is 3.09. The OD ratio isn't much different than 4th, and won't drop RPM's the way the .67 in the 200 will. Finally, you'll have to pay for both an adapter ($600) and a controller ($750).

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First gear is not "way too low" if you run a 3.23 final-drive, which will give you an overdriven 4th gear of (.83 X 3.23) 2.68:1. Just about right.

With the 3.59 first gear, you'd have an overall ratio of 11.6:1 which compares with a 2.82 first gear and a 4.10 final drive; plenty of stump-pulling gear.


So, if you take advantage of the deep first gear, (by running a 3.23 ring and pinion,) the .83:1 OD ratio is no longer an issue. You have a good 1st gear for launches and an effective overdrive.

My 2-cents...