Originally Posted by
jenson40
all my lhs has is 30 percent at the moment or realy old quarts of traxxas 20 percent dont wanna run that and can i use a shim off a werks b5? so i can use 30 percent and no shim if i have to? it will just be alittle harder on the rod?
If 30 % is all you can get just use that.
I will be a little harder on the rod and wrist pin that's all.
A .2mm shim is what you are after. I don't know what shim the werks motors run.
The shim will help lower the compression, especially with the 30 %