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Speaking of keeping the Motor 3-1/2" stock stroke of the EL's ...
Here's a bit of Hot-Roding ...
This pile of rust is a 40 EL .. ^^
Did away with the Oem stepped pin .. Pretty much all of the crank was done ....
The crank on the left is what I built up to replace the Oem crank on the right..
T&O Flywheels with the stock EL stroke using the FL crankpin and H-Beam rods.
Shaved a bit of weight off the left hand flywheel just for faster revs ....
The bore was at 0.030" oversize but didn't clean up till 0.060" over..
Did a face cut on the gasket surface and left a 0.004" step for using a fire ring head gasket. (That was for a bit more crush on the ring)
Leineweber #1 cam ...
And woop-de-doo ...Attached FilesTake my 45 and outrun em all ..Comment
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Also using ULH flathead flywheels were the trick back in the day..............
Oh I'm sorry I'm helping him with the frame...... LOLComment
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Yeah the U wheels gave a bit more stroke than the FL had.
U wheels = 4-9/32"
FL ...".... = 3-31/32"Last edited by Dragstews; 10-04-2019, 4:01 PM.Take my 45 and outrun em all ..Comment
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Jugs, gasket surface to gasket surface = 5 13/32"
Head bolts = 4 of them measure 2 7/8", 6 of them have been ground down to 2 9/16"
Stroke is 3 31/32"Comment
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With a stroke of 3 31/32, and the pistons you have, your motor has been upped to 74cu.in. That is not uncommon.
JimComment
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FL jugs are 5.530" from gasket to gasket surface ...
Here's a kicker about the FL jugs ...
The Mo-Co used the same casting for making the 74" jugs from the EL casting ...
That was taking the 3-5/16" bore of the EL and boring it out to 3-7/16" of the FL bore ... Which means they bored the EL jugs 0.125" over to get to the FL bore...
Not many over-bores are left ... Going 0.030" over the 3.4375" the walls get mighty thin ...
Ya know the Boys at S&S Cycle has been making stock bore Knuck jugs in grey cast iron .
Very high tensile strength and have been beefed with more meat in crucial areas that was pron to failure.....
Last edited by Dragstews; 10-05-2019, 9:02 AM.Take my 45 and outrun em all ..Comment
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Pulled the gear cover just now and found the last thing I hoped to see.... chunks of casing metal.....
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^^^^^^^^ Well Damn.......^^^^^^^^^ That's all I can say....... But it can and should be fixed not replaced.............Comment
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No Biggie ....
That can be repaired ...
My wonder is what caused that damage .... ??
I do see this up-grade to the 58-up Torrington bearing ...
Hope whoever did that job got the hole bored straight ...??Last edited by Dragstews; 10-04-2019, 6:04 PM.Take my 45 and outrun em all ..Comment
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That will require welding and some mill work ... Could take it back to the standard size by machining a sleeve to press in ...
I do that work, if yo're unable to fine someone local ...
That makes two of us ... Lol
Really depends on if a sleeve will be needed ... Lot more shop time is involved doing that ...
Might get by with doing a 0.030" overbore ...???Last edited by Dragstews; 10-04-2019, 6:13 PM.Take my 45 and outrun em all ..Comment
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