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Ellz’s LsFd build

New chapter of the car started today with the arrival of a electric power steering pump
This trw unit is used in Porsche 997 cup cars and also Vauxhall zafira’s so they’re pennies to buy
This one was £27 delivered
Currently the car has its lines looped on the rack so will need to make new hard lines and get a pressure line made up

non powered rack with the 255s is hard work so this should really help drivability

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Ohhh nice!! Power steering with the swap is definitely something that doesn't quite work as well as it could so I'm interested to see this happen
 
What set up do you have and what are the issues?
Well, primarily my biggest issue was just a leak because of overly complicated pipework tbqh. :)
I have the stock LS3 pump & original rack, it goes through the original cooler/hardline but I think all the pipe diameters are different so there's a bit of a mess hose wise, with two different hoses between the pump & cooler/hardline.
I'm not sure if it started leaking because of it over heated or got over pressure, I only seriously noticed it happening after going on track, but I was reading on norotors about it, and quite a lot of people were complaining about it(but maybe that's just people on the forum complaining :) )
 
Well, primarily my biggest issue was just a leak because of overly complicated pipework tbqh. :)
I have the stock LS3 pump & original rack, it goes through the original cooler/hardline but I think all the pipe diameters are different so there's a bit of a mess hose wise, with two different hoses between the pump & cooler/hardline.
I'm not sure if it started leaking because of it over heated or got over pressure, I only seriously noticed it happening after going on track, but I was reading on norotors about it, and quite a lot of people were complaining about it(but maybe that's just people on the forum complaining :) )

Isn't there a fitting (turn one?) that reduces the flow and a spring mod to lower the pressure to get close to the original Mazda flow rate & pressure?
 
I run the stock Camaro LS3 pump. I shimmed the spring. There is a kit you can buy, but I just copied the concept and guessed/calculated the shim size to use. From memory, modifying/shimming the spring only alters the max pressure the pump will achieve if you hold it on the lock stops for example (essentially a pressure relief valve). Good protection for the rack, but the assistance will remain higher than the Mazda pump. Assistance is controlled by flow, rather than pressure, which is why you need the Turn One (or similar) outlet fitting with smaller orifice. I shared in a pic in my build thread comparing the 2. The downside to the Turn One fitting is that it forces more of the pumped fluid to be recirculated in the pump, rather than run through the rack and cooler. Track cars often overheat their PS fluid, so I fitted a small Setrab oil cooler to the return line (in front of the stock trans cooler). It has never pushed fluid out of the reservoir on track. From memory I've got a weld on fitting to the Mazda hard pipe that connects to the near side of the car, with a screw together steel ended hose to the pump. The return lines use push together oil lines connections and hose (no change in hose diameter). I also run an ATI 10% underdrive front pulley which has the additional benefit of slowing the water pump down which is known to start cavitating at high RPM.

Some people have fitted the RX7 pump to the LS with a bracket.

Be interesting to see how this TRW pump works out, I had not heard of them before.
 
Went to check the fd was still at my workshop today

hopefully gonna get the motivation to crack on with the power steering and maybe get some softer coil overs as the 14k springs on the tein circuit masters is a bit too much for road driving

if anyone knows the thread sizes on the steering rack that would be wonderful

Cleaned the car after retro rides gathering a month ago got some nice pics with my new iPhone

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