- Joined
- Aug 14, 2014
- Messages
- 4,542
- Reaction score
- 1,588
- Location
- Madison, WI
- My Car
- 1971 Mach 1 w/408C stroker
The new pump can produces higher pressure, but slightly lower volume. However, that is not the issue. I truly believe the Tuff Stuff pump was broken. A hint of that are all the metal pieces I found on the magnet. I am not going to embark on a forensic analysis of it, but I will save it as a core for the future.
In regards to pressure (PSI) and volume (flowrate), pressure creates force. You need force to move the wheels. Volume gives you turning speed. So if you turn the steering wheel too fast that it becomes hard that means that there is not enough volume to keep up with the speed at which you want to turn the wheels. However, there is a relationship between pressure and volume and they are constantly changing. That is, theoretically, at the highest pressure volume will be minimal (pressure limited), and at the lowest pressure, volume will be highest. The highest pressure in a system would be when turning the wheels with the car parked. However, this high pressure should be much below the maximum the pump can deliver. Volume is more of an issue when quick steering is needed, specially in a course or AutoX. The road "feel" is going to be more affected by volume and the valve inside the steering box.
Good quick reads:
https://leepowersteering.com/pages/steering-feel-explained
https://turnonesteering.com/2020/01/understanding-pressure-vs-flow/
https://turnonesteering.com/2020/01/why-the-flow-control-spring-shouldnt-be-cut/
In regards to pressure (PSI) and volume (flowrate), pressure creates force. You need force to move the wheels. Volume gives you turning speed. So if you turn the steering wheel too fast that it becomes hard that means that there is not enough volume to keep up with the speed at which you want to turn the wheels. However, there is a relationship between pressure and volume and they are constantly changing. That is, theoretically, at the highest pressure volume will be minimal (pressure limited), and at the lowest pressure, volume will be highest. The highest pressure in a system would be when turning the wheels with the car parked. However, this high pressure should be much below the maximum the pump can deliver. Volume is more of an issue when quick steering is needed, specially in a course or AutoX. The road "feel" is going to be more affected by volume and the valve inside the steering box.
Good quick reads:
https://leepowersteering.com/pages/steering-feel-explained
https://turnonesteering.com/2020/01/understanding-pressure-vs-flow/
https://turnonesteering.com/2020/01/why-the-flow-control-spring-shouldnt-be-cut/
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