R/C Tech Forums - Charred Piston and Glow Plug

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Backspace.

11-24-2010 05:08 AM

Charred Piston and Glow Plug

I'm running an OS VZR Version II with OS RP7 Plug and Byrons 25%. Engine is not running very lean and a fair amount of smoke is emitted when out of corners and straights. But why do I have those parts burnt black ? Is it due to the shimming ? :cry:

Scott Fisher

11-24-2010 08:41 AM

Quote:

Originally Posted by Backspace. (Post 8253240)

The burn patterns are from the oil. Castor oil is a big part of those burns. If the engine is running fine, don't worry about the burn patterns.

wingracer

11-24-2010 08:47 AM

Like Scott said, castor oil turns it black. If it was badly overheating, the caster would char and leave a grey, ashy residue.

Backspace.

11-24-2010 05:53 PM

It's running fine and sounds healthy. So I can just ignore the burnt parts ?

Scott Fisher

11-26-2010 08:50 AM

Quote:

Originally Posted by Backspace. (Post 8256107)

It's running fine and sounds healthy. So I can just ignore the burnt parts ?

Yes.

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