From: xenolith@optusnet.com.au   
      
   On 7/1/21 11:56 pm, Pedro Valdez wrote:   
   > I spotted a listing on eBay what claimed:   
   > Available for all new style LS series engine that have a separate thermostat   
   and water neck. These thermostats are available in 160, 180 and 195°F   
   temperatures to suit any application. Mr. Gasket's 2005 Pontiac GTO test car   
   gained 5 hp with the 180°    
   unit.   
   >   
   > Surely if you were testing maximum power on a dyno, the engine would warm up   
   beyond the standard 195 degrees. How can it make a difference?   
   > More likely the extra HP came from somebody turning off the aircon.   
   >   
   The lower temperature thermostat would run the engine cooler by 15   
   degrees and that would increase intake air *density* resulting in more   
   power. For a performance application, the 160 thermostat might even gain   
   a little more power - for the same reason. Note too, running the engine   
   cooler means you have more leeway in the risk of auto-ignition of the   
   end gas meaning less risk of detonation. You can get away with either   
   more spark advance and a higher compression ratio.   
      
      
      
   --   
      
   Xeno   
      
      
   Nothing astonishes Noddy so much as common sense and plain dealing.   
          (with apologies to Ralph Waldo Emerson)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)