robbovius wrote:
Yeah there's a cush drive in that housing, though i couldnt find any schematics for whats inside. An article i found on the london telegraph website mentioned that it used rubber cushions like those used in motorcycle rear wheels, but thts about all i could find.
I'm new here, but have followed the M3W quite closely and I'm a member of the Talk Morgan forum in the UK, although I live in the great St. Louis MO area.
The S&S motor uses NO jack shafts. The Harley or S&S both have a short splined shaft on the primary side of the motor and the Morgan uses a modified Harley compensator. The cut off the sprocket teeth and they "stack" the compensator with a housing extending back toward the transmission. Within this housing is the comp that smooths out the torque pulses from the V-twin motor.
The flywheel is supported by a sandwiched plate with a short shaft that mimics the end of the crankshaft. This short shaft runs through a wide double roller sealed bearing in the adaptor plate. The comp housing then has a rubber "cush" joint similar, if not the same, as what BMW uses on the rear of their driveshafts in their cars. This bolts in between the comp housing and the short stub shaft for the flywheel. On the flywheel side, the parts are as they are in a Miata.
There is a short driveshaft that the slides into the trans and then bolts to the front of the bevel box made by Quaife special for Morgan. I believe it to be around a 2:1 ratio with the remainder made up on the rear belt drive.
If anyone here is familiar with the larger CVO late model Harleys with the 110" motors, you will know that the compensators on them are just plain junk. My '09 CVO Road Glide has low miles and I've not thrashed it badly and I've still got a good comp. But I know guys on their second or third comp.
Morgan has now gone away from the Harley style comp and are using a true cush drive made for their application from Centa in Europe. This is has a shaft with four round slots about 4" in diameter and a housing slightly larger with four round slots in it. In the four slots they have four rubber round logs that act as a cushion for the torque and there is no metal to metal like on the Harley comp.
I've started to pick up parts for one as a project build for myself. I have a couple hundred mile 1800GL Goldwing final drive box that's 2.75:1 and I plan to do a front bearing support for the driveshaft and then where the wheel bolts on with be my belt drive sprocket. I also have a very low mileage Touring rear wheel in a 16"x5" with the HD rotor and disc caliper. I'll make up my own swingarm etc.
But my main concern has been the V-twin, although that's what drew my interest in the first place. These are ALL listed as motorcycles regardless of steering wheel and seat/shoulder belts.
The original cycle car was made by Liberty Ace in Washington state. They made them using the "B" Harley motor with the counterbalanced motors. This way there were a LOT smoother than the non balanced rubber mounted touring motors. The Liberty used a Miata 5 speed just as Morgan does now. The Liberty used a Goldwing complete swingarm and the driveshaft was offset toward the rear of the interior to match up with the offset side drive on the Goldwing driveshaft in the swingarm assembly.
I joined here to as questions about running a Miata as a standalone motor/trans in my project car. I'm really thinking that just going with the complete 1.6L or 1.8L motor/trans combo will be better, no torque or comp issues to deal with and a complete 40k to 55k motor/trans can be pickup with free shipping for $1100 to $1400.
Although I DO want to run a distributor and carb setup. I understand the Ford Escort used the same motor and the distributor from it will replace the crank position sensor that slides into the rear of either the left or right cam, depending on 1.6L or 1.8L.
Enough on that for now.
If you go to my Picture Trail album link, you can see some pictures that I've stored there under the Morgan Three Wheeler album. You can also see some of my project and builds there. I'm particularly proud of my '40 Willys coupe with a blown 392 Chrysler hemi. I put 16k miles on that car in '00 and '01 and 6200 miles were all done in 23 days when I was part of the Rod & Custom Magazine's first Ego Rama Shootout. My wife and I left Michigan and drove to Bonneville and met up with everyone there. We then drove 1700 miles up through Salt Lake City, Jackson Hole, Yellowstone, Idaho, Lake Tahoe, on to Pleasanton CA for the Good Guys West Coast Nationals in '01. That was a real trip with lots of fun along the way.
http://www.picturetrail.com/Dan_LockwoodSorry to ramble guys, have a great weekend.
_________________
Dan
1976 FLH Electra Glide
2009 FLTRSE3 Road Glide
Boardtrack Racer Project Bike
Morgan Three Wheeler Project
Picture Trail Photo Albums
http://www.picturetrail.com/Dan_Lockwood
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