proper head shim setting for Novarossi 12 and OS 12TZ
#1
proper head shim setting for Novarossi 12 and OS 12TZ
i want to know proper head shim setting for Novarossi 12 and OS 12TZ
in 25% nitro Fuel.
in 25% nitro Fuel.
#2
Gansei from info i have gathered the guidelines are :
16% - total head clearance of .35/.45mm
25%/30% - total head clearance of .45/.6mm
Also start with teh higher suggested clearance and and come down while checking the piston for detonation regularly.
The higher clearance should give a better top end ,while the lower clearance should improve bottom end torque.
Also check through for posts from AFM ,lots of good info or PM me email address.I have info i have collected saved.
16% - total head clearance of .35/.45mm
25%/30% - total head clearance of .45/.6mm
Also start with teh higher suggested clearance and and come down while checking the piston for detonation regularly.
The higher clearance should give a better top end ,while the lower clearance should improve bottom end torque.
Also check through for posts from AFM ,lots of good info or PM me email address.I have info i have collected saved.
#3
Originally Posted by gansei
i want to know proper head shim setting for Novarossi 12 and OS 12TZ
in 25% nitro Fuel.
in 25% nitro Fuel.
In my car, you don't have to follow mine : 0.3mm x 2 ( milder compression for break in and longer lasting on glow plug ). When the p/s/r become older, I use only 0.3mm + 0.1mm. I feel using thicker shims make my engine idle better.
I'm using 25% nitro most of the time. Sometimes 30% ( older engine only )