Old Os 21 running issues

[jclifford]

didn't know that, I will re-check. more than likely the heli fuel will work better? although the stuff I am using is 30% nitro, I don't think I really need that in a non-competitive car.

 

[monstertruckier15]

I only run 15% nitro with 18% air fuel. As fuel gets higher in price I'm not going to buy anymore. I plan on making it myself. With the 30% your running now you need a head shim. Os is set to run 20% nitro max.

 

[jclifford]

I am not running the 30%, I was asking if I should. I know the heli fuel has a higher oil content.
I have been using the same fuel as I use with the Traxxas 3.3,
I am going to check what the actual oil content is on the car fuel.

 

[monstertruckier15]

Ok . Traxxas fuel is 14% oil lube. Heli fuel is 20-22% oil lube.

 

[nitroxin]

hello ,,I hate to mention this ,,,Because you probably did already .Some plugs will light and still not be right .# 1 fix in my experience. The right
oem plug will have the best shot . Heat range and all . and like nitro% and oil like 15 said !
Good luck

 

[monstertruckier15]

Os recommends #8 plugs is which is all I use.

 

[monstertruckier15]

Os recommends #8 os plugs.