Farmall Cub Forum -- Questions and answers to all of your Cub related issues.
Moderator: Team Cub
Landreo wrote:To run as a "forble" I needed to add a second set of points 90 degrees from the original, I used a set of lawnmower points to get the 90 degree offset.
Major cam shaft modification would be required. No changes made to crankshaft.
Ignition firing, firing order would be: Fire the two cylinders at TDC compression stroke. Fire other two cylinders at 180 degree crankshaft rotation. 540 degree crankshaft rotation without firing cylinders or firing the cylinders on the exhaust stroke. Bringing us back to fire two cylinders at TDC.
I have an excuse. CRS.
- Cub Pro
- Posts: 10948
- Joined: Fri Jul 02, 2004 9:52 pm
- Location: Mo. Linn
- Zip Code: 65051
So the version with modified crankshaft would fire evenly, like a Deere, while the modified camshaft would "lope", like a Harley. Two different characteristics and sounds, but two different ways to make it a twin cylinder.....
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)
- Cub Pro
- Posts: 1582
- Joined: Sun Jul 01, 2007 10:07 pm
- Location: SC, Simpsonville 29681
- Zip Code: 29681
- Circle of Safety: Y
Return to Farmall Cub
Who is online
Users browsing this forum: Arthur Luke, Bill E Bob, shyntempt, tst, Wakulla Bill and 11 guests