Today's Message Index:
----------------------
 
     1. 10:01 AM - 10:1 Compression / IO-360 200 HP (Matt Dralle)
     2. 10:23 AM - Re: 10:1 Compression / IO-360 200 HP (BPA)
 
 
 

Message 1


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Time: 
10:01:28 AM PST US
From: 
Matt Dralle <dralle@matronics.com>
Subject: 
10:1 Compression / IO-360 200 HP
      
      
      
      Does anyone have any experience with 10:1 compression in a IO-360 200 HP engine?
      
      
      	* What are the down sides of running 10:1 in that engine?  
      
      	* What is the HP gain?  
      
      	* What is the impact to TBO?  
      
      	* What is the impact to reliability?
      
      If you've done it, would you do it again, or just go with the standard 8.7:1 compression?
      
      Matt Dralle
      RV-8 #82880
      
      

Message 2


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Time: 
10:23:40 AM PST US
Subject: 
10:1 Compression / IO-360 200 HP
From: 
"BPA" <BPA@bpaengines.com>
      
      
      Matt,
      
      
      I think I can answer your questions.
      
      * The down side to running 10:1 pistons in the 200 hp IO-360 is the
      increase
        in cylinder pressures and bearing loads, particularly the rod
      bearings.
      
      * We see an increase of approximately 6-8 HP on our dynamometer. 
      
      * You can just about count on a 1,000 hour TBO with 10:1 pistons
      
      * See last answer!
      
      TBO's are subjective and more dependant on operator input, maintenance
      and frequency of use, or lack thereof. 
      
      Hope this helps,
      
      Allen 
      BPE, Inc.  
      
      -----Original Message-----
      From: owner-rv8-list-server@matronics.com
      [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Matt Dralle
      Sent: Thursday, July 17, 2008 10:56 AM
      Subject: RV8-List: 10:1 Compression / IO-360 200 HP
      
      
      
      Does anyone have any experience with 10:1 compression in a IO-360 200 HP
      engine?  
      
      	* What are the down sides of running 10:1 in that engine?  
      
      	* What is the HP gain?  
      
      	* What is the impact to TBO?  
      
      	* What is the impact to reliability?
      
      If you've done it, would you do it again, or just go with the standard
      8.7:1 compression?
      
      Matt Dralle
      RV-8 #82880
      
      








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