need pic of power steering at rack

Acesanugal · 04-03-2013, 10:52 PM

Well, what year is your car? N/A or Turbo?

- S4 systems are "velocity" (speed) sensing tech.

- S5 systems are the cheapened engine speed (RPM) setups that Mazda went to for all S5 N/As.

- S5 TII's retained the S4 velocity sensing systems.

So...

The 86-88 systems are velocity sensing, known as " 3-line ", while the 89-91 engine-speed sensing are referred to as the " 2-line " . This is literal. Bearing in mind that both racks and pumps have a non-pressure return line at the reservoirs, it counts as one line. S5 power steering systems are 2-line, because there will only be one PRESSURE line and one non-pressure RETURN line. As you can probably imagine, 3-line systems have two PRESSURE lines from the pump to the rack, and one RETURN line -- naturally.

As for which of your lines is the pressure line(s) -- assuming left-hand drive -- the pressure lines on an 3-line rack are closest to the inner tie rod.

Whizbang · 04-04-2013, 08:21 AM

Quote:

Originally Posted by Acesanugal

As for which of your lines is the pressure line(s) -- assuming left-hand drive -- the pressure lines on an 3-line rack are closest to the inner tie rod.

thats what i needed! suppose i should i have specified im running a miata pump on an FC (s4) rack

04-03-2013, 10:52 PM	#1
Acesanugal Completely Insane... Join Date: Apr 2008 Location: Burlington, Vermont Posts: 7 Rep Power: 0	Well, what year is your car? N/A or Turbo? - S4 systems are "velocity" (speed) sensing tech. - S5 systems are the cheapened engine speed (RPM) setups that Mazda went to for all S5 N/As. - S5 TII's retained the S4 velocity sensing systems. So... The 86-88 systems are velocity sensing, known as " 3-line ", while the 89-91 engine-speed sensing are referred to as the " 2-line " . This is literal. Bearing in mind that both racks and pumps have a non-pressure return line at the reservoirs, it counts as one line. S5 power steering systems are 2-line, because there will only be one PRESSURE line and one non-pressure RETURN line. As you can probably imagine, 3-line systems have two PRESSURE lines from the pump to the rack, and one RETURN line -- naturally. As for which of your lines is the pressure line(s) -- assuming left-hand drive -- the pressure lines on an 3-line rack are closest to the inner tie rod. __________________ FC + Severe Snow Service tires = Winter Rotary!