.12 riggers

[taber]

what kind of head clearance are people using on the .12 engines also flex shaft dia. and what % nitro in fuel ?

 

[gooycheese]

Im using a NR.12 , I have the head clearance set at .006 and run 60% fuel with 18% oil (I have run 70% also but not often) ohhh .125 hughey flex .187 propshaft (1440 prop on my .12 Hydro)

Paul

 

[TCHedOff]

3port NR; sleeve is shimmed to .012; 60% fuel; .150 flex cable to 3/16 propshaft; backcut 1440 prop.

 

[Geraghty]

3port NR; sleeve is shimmed to .012; 60% fuel; .150 flex cable to 3/16 propshaft; backcut 1440 prop.

The piston liner has also been raised .035"........

 

[taber]

3port NR; sleeve is shimmed to .012; 60% fuel; .150 flex cable to 3/16 propshaft; backcut 1440 prop.

The piston liner has also been raised .035"........

I think he meant head shimed to 12 thou. I also heard that sleeve should be shimed 30-35 thou. Thanks Rod. What kind of head vol. would you run with a nova 15. I would imagine the timing #s would be similar to the .12