Quote:
Originally Posted by dbronnik
If you want 1M performance, do it properly with an M3 rear axle, differential, subframe, etc. You can build a legit 1m clone for much less than the cost of an original, especially if you skip the rear fenders (you can run 275 square without bothering with that).
I used to run a similar setup to you but with 275 square RE71s before I did the M3 subframe/diff swap and it's a night and day difference in feel/performance.
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The idea is to pour the least amount of money possible into this car. Those parts you mention are all nice to have but they are not necessary to match the 1M performance. Really, all that the 135i needs now is better brakes. Once it has the wider wheels up front, it will surpass the 1M on the track. And this is before adding a tune.
I know a fast driver in a 135i who upgraded to the M3 subframe/diff but unfortunately it didn't translate to any improvement on the track. The Quaife/Torsen is better than one may think. Plus no maintenance!
Personally, I'd rather save the money and spend as much as I can on driver improvement (coaching/education) and more seat time.