So I had couple of stock E50 2-shoe clutches laying around and I thought I’d try doing some clutch tuning this weekend. Here’s what I found out…
-The shoes stock are not a uniform weight, they varied up to 7g, this leads to vibration.
-You can’t turn the screws all the way in, the shoes will be restricted and you’ll end up with major slippage.
-80g is the lightest you’ll want to go; slip was noticeable at this weight but they engaged at a much higher rpm. They eventually grabbed but it took a pretty long distance to fully engage. Stock shoes were around 95g-102g.
-So far the best I found is: shoes balanced to 95g, spring screws 540 degrees out; this gave me slightly better then stock acceleration (not really worth the trouble for the minimal gain), noticeably less vibration (worth the trouble if you’ve got the clutch off already), overall it’s a good set-up.
I plan on tapping in a screw to the end of shoes so I can add weights; I’ll try some various weight set-ups to find the best. I’m thinking around 90g should still give me enough weight to grab and should allow it to engage at a high enough RPM to give me the acceleration I’m looking for, we’ll see. I’m also trying to find some heavier springs; this is really where gains are going to be made as you can only lighten so much before you start to get slippage. I’ll post more as I progress.
(Picture attached is the one with the lightend/balanced 80g shoes.)