04-01-2022, 04:15 PM
(This post was last modified: 04-01-2022, 04:17 PM by Hedd_Jones.)
(10-05-2021, 08:48 PM)Dave Mann Wrote: It's all very well measuring from the clutch plate, the more important reference is the bell housing face as I've come across two engines recently where the flywheel has been lapped onto the crank so much that the flywheel boss had to be machined to stop it bottoming on the rear main bearing.
does anyone have this dim please?. Bellhousing face to 4speed toggle face
The engine I have taken out of the car, a 4 speed job, the clutch fingers are broadly 0.2'' from the face of the bellhousing.
The engine that is going back in the fingers are currently nearly 0.5''.
I am tempted by this roller method to cure having about 1/2cwt of blunt drills to choose from to make rollers. But it would be good to know what I need to be shooting for.
I agree wholeheartedly with Dave, the 1.25'' dim quoted from the clutch plate is not actually a datum. Its a variable!. Though I do accept that it will get me pretty close.
I'm not convinced the 0.2'' dim on the current engine is ideal as it has washers between the rear cover and flywheel, the linings on the plate (borg & Beck or N&B), and a clamp style clutch pedal, and a 3 sync gearbox on a 1934 low chassis case. So its far from standard for a 1934 chrome rad car.
Otherwise I shall measure the lot and see where I get by working the logic. I know from doing similar that 6mm works very well for a 3speed car with standard components.