The short 5 only has 5/8 brushes thus it’s limited in its current handling ability. unfortunately the long 5 which has 1 1/4 brushes wont fit the early machines. I hot rodded a short 5 and and when it went out it also took out the controller. An expensive lesson.
Look older carts were equipped with 8.9 or 10.35 gear boxes. If you stick with 21 inch tires and add a RFF 7.5 motor your T1 or T2 controller will allow you to travel in the high 30s.
Adding voltage will produce more horsepower out of a given unit. The horsepower applied to the wheels determines the heat generated. Higher voltage does not mean cooler running .
In my opinion your wasting time messing with a 5hp motor. You can buy a RFF or other 7.5hp motor and not purchase any thing else and not have to reinvent the wheel to get good performance.
You know that the brakes on pre 2005 carts were iffy at 25 Mph. If you go faster you need to upgrade.
Lets talk about 84 volts. My next project is to take a post 2005 cart and convert it to pre 2005 electrics. I will also go to 84 volts with the addition of an additional 12volt conventional battery.for more range.
WHY: T2 controllers are now available at 500 amp capability. I buy DEKA size 31 105 amp clones for $97 apiece. They are good for 3/4 years before range is down to 12/13 miles. The cart will ride even better with the addition of another 60 pounds. I wont have the investment of the lithium installation or the extreem amount of wiring and complication of a BMS system. I wont have to modify the cart suspension because of a bad ride. And I end up with a cheap bang bang system that wont require a skilled technician to maintain.
PERFORMANCE: To put things in perspective. My 2002 2 seater in stock form went 25 MPH and climbed the
mini hills in our area at 21 MPH. Presently it does 40 MPH and climbs the same at 32 MPH. It spins the wheels on dry pavement. At 25/26 MPH my range is 22 miles on the flat. Checked this out on a single trip. New batteries not broken in.
10.35 gear box
RFF Advance Black motor (modified by me)
21 inch fat tires on 10 inch rims
7/8 bore master cylinder for more brake pressure.
The things to guard against are excessive tire size for the installed gearbox. 21 inch for 8.9 and 10.35 24 inch for 12.44. Or less.
Installing 24 inch tires on a 10.35 can turn into a poor performance, range eating slug. Braking performance goes down as the tire size goes up.
The sweet spot for performance motors is 6000 RPM +/- Lugging them causes poor acceleration and reduced climbing ability.
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In a message dated 7/16/2018 9:12:53 PM US Eastern Standard Time, email@example.com writes: