Re: Has anyone ever successfully installed an SL55 SC onto the M112?
Originally Posted by
Billy22Bob
Still trying to get my head around the 1.6L SC v the 2.3L SC, their internal gearing, mesh and subsequently their various rotor rpm.
You can tell by the many fotos on the web that the 2.3L has an internal gearing system which apparently takes your pulley ratio
2:1? and cranks at least one of the rotors up to a reported 23,000rpm. (If anyone knows the stock ratio for an SL55 - much appreciated)
I can only guess that if one has 3 lobes but the other has 5 "concaves"- I'm guessing they spin at different speeds - the 5Xconcave rotor would spin at 3/5ths of the speed of the 3 lober.
But still cant get my head around (visualise) these two spinning at different rpm....- I guess other gears do.....oh wise ones please chime in.
This also applies to the little brother - the 1.6L SC
Now the 1.6L SC has some form of gearing (difficult to find exploded view photos of the 1.6L) but in this case I believe (at least) one rotor spins at SC pulley speed (direct drive?) and I guess the other one spins at 5/3 or 3/5 that rpm.
thoughts?....
Some pics to show others what you are talking about.
35 teeth (5 lobes) and 21 teeth (3 lobes), so the 5 lobe rotates 1.666 (35/21) times as fast as the 3 lobes. As you say a gear is a gear and the lobes mesh so ....... they rotate at different speeds.
The 35 tooth gear rotates the same speed as the pulley.
I got these great photos of some forum, and I have lost that info. My apologies to the photographer, I believe it was a MB forum with a lot of info on his rebuild of a SC. If I can find the info I will give credit.
Last edited by onehundred80; Nov 9, 2013 at 08:51 PM.
Reason: modified to correct obvious error, not to me though. LOL