LRP ZR30 Spec 4 Head Shims and Timing

Bboy86

Member
Messages
22
Hey Guys,

I’ve been experimenting with head shims and glow plugs. I currently have 0.6mm totaling head shims and OS 7. I have found the engine to run cooler, and it has lower end torque, but it doesn’t seem to be as powerful in the higher rev range. The air temps here are 8 degrees C and I’m still getting temps of 110C.

I was just wondering what you guys have tried and what he worked.
Thanks
 

Sparky

Active Member
Messages
91
Once the engine is fully broken in drop down to just the thickest headshim and run 30% nitro
 

Sparky

Active Member
Messages
91
I haven't tuned by temp in years,
You'll get to know by the sound of a motor, how it's running
And a motor will run cooler on a higher nitro content,
You might also have to richen the needles a bit when running 30% nitro
 

Bboy86

Member
Messages
22
Cool I’ll give it a try. I’m running 25% now. You didn’t do a mini break when changing nitro?
 
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