Originally Posted by BrainTeased
im getting confused whats a T-bar and whats a Linked rear end
It's all actually quite easy. When people say T-bar or links they are talking about the rear suspension and the method in which the chassis is attached to the pod.
T-bar cars have a T shaped piece of fiberglass that is attached to the chassis using two pivot balls and attached rigidly to the rear pod. Tweak screws are placed near the front pivot ball to keep the T-bar from pivoting side to side and allowing you to "pre-load" either side by turning the screws. The rear of a T-bar car is based around flex, both side to side motion and up and down motion are "sprung" by the T-bar. T-bar based cars can either use damper tubes or a damper disc to soften and slow that side to side motion. For example a CRC T-Fource uses a T-bar design with damper tubes, an Associated 12L4 uses the same T-bar design but a disc to dampen suspension movement.
Link or sping cars don't use a T-bar at all. This has some huge advantages mainly batter placement. In a T-bar car the batteries must be placed on either side of the T-bar as there just isn't any other place to put them. In a link or spring car the center of the chassis is not being used so the batteries may be placed in the center of the car allowing much faster transition. Speedmerchant and CRC link cars are based on the same rough concept. A pivot ball in the center of the chassis attaches the rear pod and two links, one on each side maintain the alignment of the rear end. Two springs are placed on the rear of the car just over the links, these spring the rear end for side to side motion and are pre-loaded to set the tweak. Both the Speedmerchant and CRC cars use damper tubes to soften side to side motion, I haven't seen anyone try running a damper disc on a link car.
The Hara car is actually quite unique. It was based on an old HPI suspension design that basically creates a link car without the links. Rather than using two links to maintain pod alignment it has two metal uprights that pass through a guide plate. It uses spings to control side to side motion and I have seen them run with a damper disc or damper tubes. The Hara car is NOT a T-bar design.
Car choice is composed of a few things, surface and what works for you. Take a look around your local track and see what others are running, having other people around to help is always a plus. If you are running asphalt the Yokomo car is very popular and my choice for carpet would be the Speedmerchant Rev.4 hands down.
The Yokomo car info:
The Speedmerchant car info:
Whew, that was a mouthful. Have fun!