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  #1  
Old 10-16-2018, 01:34 PM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
Posts: 175
Default Crankshaft differences

I am looking at a lycoming 13B27120 for $6,000 verses a Superior SL-36500-A31 at $4,000. Does anyone have experience with the differences and is it worth it?
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  #2  
Old 10-16-2018, 10:05 PM
chevelle000 chevelle000 is offline
 
Join Date: Sep 2017
Location: Mesa,AZ
Posts: 83
Default

They both are setup for a constant speed propeller and are non-counterweighted.

Only difference is the manufacturer
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  #3  
Old 10-17-2018, 09:32 AM
az_gila's Avatar
az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
Smile

The Superior crank is equivalent to four different Lycoming part numbers including the one you list.

Details here - https://web.archive.org/web/20150919...L36500-A31.pdf
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
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La Cholla Airpark (57AZ) Tucson AZ
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  #4  
Old 10-17-2018, 10:22 AM
jask jask is offline
 
Join Date: Feb 2018
Location: Ramona, CA
Posts: 175
Default Crankshaft

thanks Gil, that is good information. Superior is changing vendors giving a 2 year leadtime and no one stocks the item so it looks like I will have to go with lycoming.
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RV-7 builder Ramona, CA.
Free prop balancing for Vans owners
(I am not in the business of prop balancing, just as a courtesy to meet other owners.)
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  #5  
Old 10-17-2018, 05:33 PM
659JR 659JR is offline
 
Join Date: Dec 2011
Location: delta, co
Posts: 204
Default ECI crank

I might have a ECI crank in the same configuration for around 4800.00. Save you a bit and they don't have the AD if you convert to fixed pitch. You can call the shop if you have any questions. I haven't been on the computer much lately.

Jesse
970-874-7575
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  #6  
Old 10-18-2018, 11:34 AM
James Ball James Ball is offline
 
Join Date: Apr 2010
Location: San Antonio, TX
Posts: 39
Default O-360 crankshaft

The Continental "Prime" aftermarket crankshaft equivalent to the Lycoming 13B27120 is part # AEL36002-1. It has a robust solid flange that is .44" thick, 1/2-20 thread flange bushings, and is set up for constant speed propeller operation. Aviall have them in stock. They are a more affordable alternative manufactured and backed by OEM Continental Motors.
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  #7  
Old 10-20-2018, 07:35 AM
Robert Anglin Robert Anglin is offline
 
Join Date: Mar 2008
Location: houston, texas
Posts: 900
Default Agreed.

James is correct. We have had good luck with the AEL cranks and I specified one for my personal engine in our 8 and it has done very well.
Yours, R.E.A. III # 80888
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