I am tying to get a bead on sizing a carburettor to an engine.
The engine is a 500cc single four-stroke cycle reving to 8200 rpm.
Currently it is fitted with a 41mm Gardner devise but a change to a VM 40 Mikuni has been a recomodation. Unfortunately the VM40 is no longer made and the next size is the VM44.
I did a few sums on gas speeds thro' the carb.,(89.5 m/s at 8200 rpm)
I have trawled thro' various books and papers but do not seem to find any suggestions. I have got a copy of G.P. Blair's book but not found much on carburettors!
Am I looking at the wrong criteria on which to size the carb. and is there something else I should look at, or should I just 'suck and see' and keep the results as an unanswered question?
Any help would be of interest and perhaps generate a topic for discussion.
Gary
The engine is a 500cc single four-stroke cycle reving to 8200 rpm.
Currently it is fitted with a 41mm Gardner devise but a change to a VM 40 Mikuni has been a recomodation. Unfortunately the VM40 is no longer made and the next size is the VM44.
I did a few sums on gas speeds thro' the carb.,(89.5 m/s at 8200 rpm)
I have trawled thro' various books and papers but do not seem to find any suggestions. I have got a copy of G.P. Blair's book but not found much on carburettors!
Am I looking at the wrong criteria on which to size the carb. and is there something else I should look at, or should I just 'suck and see' and keep the results as an unanswered question?
Any help would be of interest and perhaps generate a topic for discussion.
Gary