Sal Lubrano
Active Member
- Joined
- Apr 26, 2002
- Messages
- 1,233
I have been reading the Principles book and well as many posts. Can some tell me if I am correct in my thinking. I see the stock boost valve in a brf is .471". When a .500 or a .555". valve is installed it allows for the pressure to rise much quickly and well as reach a higher value. Almost the same for the lo/rev boost valve when a larger valve is installed it will just push harder on the regulator holding it closed raising pressure. Does anyone know what the max line pressures would be if a stock spring and .471/.500/.555 boost valves were used? If a stiffer spring or shim is installed that will raise base line pressure. But since it is harder to compress wouldn't it have an effect on the boost valves?
Also I am having difficulty understanding the line bias valve. The book says it is fed by tv oil and regulates tv pressure (modulated tv oil) as engine torque varies? My question is how does it know when engine torque changes??
Thanks for all your time. Can't learn enough about these cars.
Also I am having difficulty understanding the line bias valve. The book says it is fed by tv oil and regulates tv pressure (modulated tv oil) as engine torque varies? My question is how does it know when engine torque changes??
Thanks for all your time. Can't learn enough about these cars.