For all lurking airheads:

> I sent this email to Jake Raby and Aircooled.net�s technical support:
>  
> 
> Hi,
> 
> Can you tell me what max cylinder head temp  is recommended for type 4
> engines? By max I mean before valve seats  start falling out or getting
> hammered into the head.
> 
> Thanks for the  info
> 
> This is what I got back:
> 
> 
it depends on where you measure it. If it's at the base of the spark plug,
which is the ONLY place we recommend, I'd slow down at 425F
 
John