Other way around. The ratio would be 1:1.28 (or 0.72:1.0). For instance, if the
gearbox output is 1,000RPM, the O/D's output would be 1,280RPM. (a 28% 'boost'
in ouput). Another way of looking at it is that the O/D reduces the engine RPMs
by the stated percent. (if you switch on the O/D without applying more
throttle, the engine speed will decrease).
bs
--------------------------------
Bob Spidell - San Jose, CA
The Austin-Healey overdrive ratios are 28% and 22% which are the first
two numbers in the serial number shown on the plate on the overdrive
unit. How does that translate into figuring what the ratio coming out
of the transmission is? For example, 4th gear is 1.00 to 1.00. An
overdrive ratio would be 1.00 to (a number less than 1.00). Obviously
it is not 1.00 to 0.28 or 0.22. Would it be 1.00 to (1-0.28) or 1.00 to
0.72?
Thanks.
Charlie
_______________________________________________
Healeys@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|