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You haven't given us enough information to really give you a definitive answer, i.e. auto or manual, 4- or 5-speed, single or dual range rear end, size of bus, size and type of engine.
In most transmissions, automatic or manual, the highest gear is direct. In order to get the RPM's down at road speed you will need to get a lower numerically, higher speed rear end.
If your bus has 10-hole Budd wheels this can be accomplished relatively easily and economically by going to a larger wheel which will turn fewer times every mile.
If you have spoke wheels you will have to change your rear end ratio.
One caveat, if your bus is gas powered, make sure your bus has enough HP to pull higher speeds.
Most gas buses are doing about the best they can to turn 60MPH on the flat and really dog down on the hills.
One way to check to see if your bus will be able to turn the higher speeds is to check your manifold vacuum at your top speed.
If your are pulling less than 10" of vacuum you probably won't be able to go much faster regardless of the final gearing.
It takes a lot of HP to push or pull a bus through the air as well as down the road.
Good luck and happy trails.
Mark O.
I have a ? what do i need
to do to my trannie to get
more speed and less scream
out of my engine? please help
any advise is good
Thanx |
RV and bus conversion info since 1996.
email Mark O.
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