3.25 LSD or 3.73 LSD

[e30m20TurbO7]

So I know of two diffs one is a 3.25 that probably has really low miles an its 300 came out of a e28
And a LSD out of a 90 325is for 250

I like lower revs on the highway but I do like zipping around with a higher gear ratio in the city
I'm running a 2.7i and in plan on boosting , any input would be cool
I think I want the 3.25 but don't want to compensate for power loss , but I'd I have to i will
What would you run if you were in my shoes

[SmokeE30]

If you plan on boosting get the 3.25. You probably won't notice much diffrence in performance between the two beside highway cruising rpm. And you can always play with tire size to fine tune your gearing as well.

[ELVA164]

I agree that especially with the turbo, the 3.25 would be the way to go. I think the 3.73 is the perfect ratio for a stock b25.

[MR 325]

For a mostly stock 2.5 or 2.7i I'd go with the 3.73.

For boost I'd go with a 3.25 or 3.46 diff. I'm running a 3.46 in mine.