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Panhead question

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Old Mar 20, 2016 | 08:19 AM
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ryanneal7223's Avatar
ryanneal7223
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From: pryor oklahom
Default Panhead question

I'm buying a 48 el case set it's really hard to find el parts so if I bought fl top end would it work? Pistons hugs heads.. Also would a fl flywheel work in the case also? Basically could I have a fl in a el case I didnt know if the cases were different from 61ci to 74ci
 
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Old Mar 21, 2016 | 10:47 AM
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Common conversion years ago to use 74" cyls/crank in the EL's.
I do not remeber if the cases needed boring.
Scott
 
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Old Mar 22, 2016 | 05:04 PM
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This will help you out http://www.terra-glide.net/panhead.html ,but I remember putting 74 jugs and pistons in a 61 makes 68inches which works very well.The 61,s would outrun the 74,s up till 3rd gear and a 68 would get them to a 100.Thats with a 68 shovel cam.
 
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Old Mar 23, 2016 | 09:56 AM
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The 61"s had a 3 1/2" arm, and the big 74"s had a 3 13/32" stroke.
The 74" cylinder on the smaller stroke would've resulted in the piston being down in the hole by about 7/32".
Larger cubes, but with the ability to run on kerosene, unless the cylinder was mounted in a fixture and .218" removed from the cylinder, bringing it back to about 7.0 cr.
Scott
 
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