What is a variable ratio steering box?
What is a variable ratio steering box?
Variable-ratio steering is a system that uses different ratios on the rack in a rack and pinion steering system. At the center of the rack, the space between the teeth are smaller and the space becomes larger as the pinion moves down the rack.
What is a fast ratio steering box?
Quick-ratio gearboxes will reduce the steering wheel lock-to-lock range to as low as 2½ turns. The most popular gearbox used in the 1960s and ’70s was the Saginaw model 800.
What is variable ratio automotive?
Variable gear ratio steering is the answer. It is able to vary the steering ratio according to speed and steering angle. In addition to the variable assistance of power steering, you have a fully variable steering.
How do you reduce the steering ratio?
Modifications in the tuning area, such as better springs and changing the wheels, can possibly improve the steering ratio. A specialist or tuning workshop should clarify whether a change in the steering ratio in older vehicles is possible or useful.
What does a quick ratio steering box do?
Original Parts Group carries General Motors quick-ratio steering boxes for many 1960s and ’70s muscle cars. These are remanufactured units, which will increase steering response by shortening steering wheel travel down to 23/4 to 3 rotations lock-to-lock.
What was the ratio of Mopar power steering?
For the most part, Mopar power steering gearboxes from 1966-’74 only came from the factory in a 15.7:1 ratio and 3½ turns of the wheel, lock to lock. Manual boxes were built with a 20:1 ratio.
How much does flaming river power steering box cost?
Flaming River steering boxes will fit directly onto most late model Saginaw metric applications, and can be adapted to 1960-’76 GM muscle cars with additional parts such as a Pitman arm and power steering hoses. All four units feature trivalent chromium-free plating and retail for $599.
What kind of power steering does a 1958 Chevy have?
The 500 series boxes have a 14:1 ratio and are manufactured from a one-piece housing. They use the original Pitman arm and are a direct replacement for the OE Saginaw manual gearboxes. Part number CP-50000 fits 1955-’57 Chevrolet and CP-50003 fits 1958-’64 full-size cars.
What was the ratio of a Mopar steering box?
Mopar gearboxes from 1966-’74 only came in two ratios: The manual steering gearbox was a 24.0:1 ratio with a radius of five and a third turns of the wheel, while the power steering boxes came in 15.7:1 and three and a half turns of the wheel.
How does the ratio of the power steering gearbox work?
Power Steering Ratio Feel Explained The ratio of your power steering gearbox will determine how quickly your vehicle reacts to your steering input. The steering valve is what gives you the feel of the road. This is often spec’d out in torsion bar size.
Where can I get a quick ratio steering box?
With a little knowledge of the differences between power steering units, you can find adaptable quick-ratio gear boxes at your local pick-a-part that will have a more responsive lower ratio, as well as reduce the steering wheel range to as low as two to three full turns.
What was the steering ratio in the 1960s?
The standard 17.5:1 steering ratio (four turns lock-to-lock) was used on these units through the 1960s, but a more responsive 14.4:1 ratio (31/2 turns lock-to-lock) became the normal power steering ratio in 1970 on the full-size models. The 14.4:1 ratio replaced the earlier 17.5:1 ratio completely by 1973 for all body styles.
