Originally posted by ziggy12345
Hi
There is a large thread about head shimming here
http://www.rctech.net/forum/showthre...threadid=47210
Use a piece of solder to measure your head clearance. Insert in the glowplug hole and turn over the engine. This will flatten the end. Measure the thickness of the flat with a vernier and thats the head clearance.
For 16% it should be around 0.016" for 25% around 0.020"
Cheers
thanks Ziggy i need one of those digital verniers! no way i can get that 0.018 figure on a scale vernier.
but apart from that do you think im putting too many shims in? after reading that headshim thread im pretty sure that the VERY VERY thin shim is the 0.08 shim and the other 2 silver novarossi shims are 0.010 so maybe i have 0.028 mm shimmed installed? so basically does it sound normal to have 0.028mm shimmed on 2-3 litred old novarossi engine? maybe it was just my bad tuning skills that made it flame out the first week. (trying to tune the bottom end lean first)