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Lycoming Experts

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GENTRYLL(at)aol.com
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Posted: Fri Feb 23, 2007 5:48 am Post subject: Lycoming Experts

Would some of you guys that know a lot about Lycomings explain what some of  the engines have in common.  Like the O-235, O-290, O-320.  You see  things on the net like O-290 converted to O-320, How is that done. What  crankshafts some of the engines share.  What cylinders are interchangeable.  I have read that some of the engines such as the O-290 and O-435 share common  cylinders, jut more of them.



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MONTY(at)bpaengines.com
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Posted: Fri Feb 23, 2007 7:54 am Post subject: Lycoming Experts

Some cylinders interchange:  

 Parallel valve 360-540, WD to WD, ND to ND  

Angle head 360 to 540 t0 720, WD to WD, ND to ND  

AH 480 cyls will fit 320 but other considerations are required  

290’s will NOT convert o 320 sucessfully.  If you throw enough money at it I suppose it could happen  

235 C engines will not successfully convert to later series, such as L2C, F2C,  BUT I have done it specifically for 1 airplane.  Not approved.  It is the Knight Twister that  

won best plans built airplane at OSH about 4 years ago.  Built by Hale Wallace.  Hale stated he wanted 130 HP at 3000 RPM and I got it.  Used 0-235-F2C cylinder assemblies on 0-235 C cases, machined cases for 7/16 TCM thrubolts.  

0-320 can be and have been converted to 360’s many times.  Expensive because of the crank and rods required.  But it is relatively easy from the standpoint of assembly.  

Almost any 0- engine can be converted to I0.  Need to have the fuel pump drive.  

   

These are brief highlights.  Not meant to be a conversion manual.  Use at your own risk.  

   

Monty Barrett  

   

   

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jrccea(at)bellsouth.net
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Posted: Fri Feb 23, 2007 5:21 pm Post subject: Lycoming Experts

http://home.adelphia.net/~aeroengine/Lycoming.html

 [quote]   ---

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