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  #11  
Old 03-22-2017, 03:21 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by magiccarpet View Post
I also wonder what Synergy does in their serial production.
All production since the change was published has been without the cooling shroud.
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  #12  
Old 06-10-2017, 07:28 PM
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tomkk tomkk is offline
 
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It sounds like there's no particular advantage to leaving the cooling shroud off? That is, if it's already installed, is there any reason to remove it?
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  #13  
Old 06-11-2017, 12:07 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by tomkk View Post
That is, if it's already installed, is there any reason to remove it?
No
If there was, a notification would have been published recommending that they be removed.

More recent testing showed that the cyl. cooling was about the same with or without the shroud, so it was deleted to reduce the kit cost and reduce the chance of a builder induced problem during the engine disassembly and reassembly that was required to install it.
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  #14  
Old 08-13-2017, 11:26 AM
waterboy2110 waterboy2110 is offline
 
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There is definitely an uneven cooling with this plenum design. The design itself is questionable in that it places the #2 cylinder in a corner away from the airflow - it is clear that the #2 cylinder would be starved for cooling until enough ram are were available to charge the plenum with a high enough pressure to force an even airflow.

As for disassembly of the engine - most know that at one point Rotax insisted that you not change your oil without the service class. Not sure if that's still true but I think it's safe to assume a fair number of folks have installed the engine without any Rotax training. It's not a difficult job - but I'm sure Rotax has concerns.
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