02-03-2025, 02:19 PM
Thanks for all your great pictures and input.
It looks like every case is different !!!
In my case I have not noticed any rod clearance issues where the oil baffles normally live.
I also seem to have sufficient Camshaft clearance.
My camshaft is a one off from Newman using flat button cam followers which allow for a more modern softer profile than the Nippy Cam
I did have to reduce the outer shoulders of the centre bearing to allow the followers to fit which was a simple job on the lathe.
I have a bit more scraping to do for big end bolt clearance. I opted to use a scraper which I made out of a round file as it makes less mess than other faster means.
I will check all the points raised by your pictures before I continue the assembly work.
My current engine has a pressure fed Gordon Allen 1 1/2" Crank and Rods which was assembled about 30 years ago into a standard crankcase I dont remember any problems with rod clearance but that might be due to it being a die cast case which will have thinner walls than the sand cast Nippy / Speedy Case I am using. ( This case might be a factory replacement as it has no engine numbers on it )
Cheers Richard
It looks like every case is different !!!
In my case I have not noticed any rod clearance issues where the oil baffles normally live.
I also seem to have sufficient Camshaft clearance.
My camshaft is a one off from Newman using flat button cam followers which allow for a more modern softer profile than the Nippy Cam
I did have to reduce the outer shoulders of the centre bearing to allow the followers to fit which was a simple job on the lathe.
I have a bit more scraping to do for big end bolt clearance. I opted to use a scraper which I made out of a round file as it makes less mess than other faster means.
I will check all the points raised by your pictures before I continue the assembly work.
My current engine has a pressure fed Gordon Allen 1 1/2" Crank and Rods which was assembled about 30 years ago into a standard crankcase I dont remember any problems with rod clearance but that might be due to it being a die cast case which will have thinner walls than the sand cast Nippy / Speedy Case I am using. ( This case might be a factory replacement as it has no engine numbers on it )
Cheers Richard