Help......cart is sluggish going up hills

[metalite]

I recently bought a 1999 48V club car with the F/N/R lever below the seat area. The cart has been lifted and has a 700 amp controller(??brand)...and a 11.4 hp motor. it has 22 x 11 - 10 dirt devil tires. It had some 2007, 2008, and 2009 trojan T875 batts....the cart would run strong on flat surfaces....but after just a short amount of time it would only creep up hills. I invested in brand new US Batteries last week......the cart still performs the same way......what now??? Any help would be appreciated....could the controller be going bad....? Do they gradually go bad...? or is it something else?
Mark

[scottyb]

New batteries are only about 75% of their potential strength. It does not sound like a controller problem. Try the hill when the motor is cold, does the cart perform better than after the motor heats up?

[shadowman]

1st you need to break the batteries in and thats gonna take some time.......do it right or you,ll never be happy it should get better after they are broke in but an electric cart is gonna bog down going up hill its just the nature.....how steep are we talking about?..............................

[metalite]

same performance whether motor is warm, hot or cold....about 15-20% grade hill

[ForBruce]

you need to know if the motor was replaced with one designed for torque (climbing hills ) or speed cause larger tireswill reduce torque and give speed

also what size battery wires and what size wire going from controller to motor

some controllers are laptop programmable and you can very for increased performance