[Spridgets] Racer type button question..

John Caffrey jdc6 at Lehigh.EDU
Fri Sep 26 08:07:36 MDT 2008

Lester wrote:
> Ok, how does that measure up to exhaust gas temps? ie how would an 
> 800F exhaust temp compare to the 400F cylinder temp?  Or would that 
> simply melt the plastic?
> On Sep 26, 2008, at 8:50 AM, John Caffrey wrote:
>> Lester wrote:
>>> Morning all,
>>> do any of you know the temp range  for the plastic buttons being 
>>> used  to keep the wristpin in the piston?  and where they are sold?
>> Lester,
>> Can't tell you where to buy them, I made my own buttons from teflon 
>> rod. The upper temperature range for virgin teflon is at least 400F. 
>> Don't use glass-filled teflon, too abrasive.
>> John
>> Fogelsville, PA
Yes it would melt. It decomposes to a toxic gas around 450-500F. Never 
thought about a two stroke application, and don't know of any plastics 
that can operate there.

More information about the Spridgets mailing list