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I was wondering if anybody tried to replace the big and leaking power steering pump with a modern more reliable and compact one. Say from an 164. Apart from the mounting modifications needed... would it work with our steering racks? Any mods on the circuit?

Sorry, but a 164 P/S pump is even larger than those on the Milano/75.... Can work though to source a smaller one.

We used a small Diahatsu unit on a race motor recently....

Dawie and I now also use an electric (larger but MUCH lighter) unit on the 156 GTA race car and it is sweet!!! - Can be mounted anywhere (even inside the cabin), weighs almost nothing and can be run by the flick of a switch off of the battery, without the engine running...

oops sorry! I meant 146! They seem quite compact.

The electric pump sounds great!

But if you want to stick with the traditional setup, what's the story? So a daihatsu unit will work... good!

What i don't know is what kind of pressure the pumps produce (gtv6, 75)and if the new ones (146, 156?) have remained in about the same pressure level.

Anybody else experiensing with this stuff??

I remember reading 2000psi for the 75, but I have no idea how accurate that information was/is.

Hmmmm..

2000Psi!!!!

run away eveyone!! She's gona BLOW!!

Jungle Justice

Please give us the details of the electric power steering pump? Like who makes it, and how much ?

Bye for now

Milanoguy
Houston TX USA
1987 Milano

You can try using the MKII MR2 PS pump, it's electric as well.

AR75's and AR90's like all cars with small diameter rack pistons run at 120bar which is much higher than AR146,AR164 and the electrical applications mentioned at +-70bar.
You will end up with a heavy P/S unless you modify the inbuilt pump relief valve.

i've actually replaced the frothing PS pump on my 75 TS with a 146 1.7 boxer one. the result was a super light PS steering which makes it impossible to drive at higher speed, not to mention the almost zero road feel. tried lowering the oil pressure from the pump to the rack by drilling small holes on the pipe connector joint to the pump, but result was a sometimes working sometimes not PS. in the end i gave up and went back to putting the frothing PS pump (froths the oil even after i've replaced all the internal o-rings in the pump)...to prevent messy spillage from the PS oil reservoir, i made a simple spillover bottle with breather, connect the breather hole on the reservoir cover with the spillover bottle with rubber hose, have been happy since. of course, oil still froths, and in the morning i need to drive it a bit before the trapped air in the rack gets out and i get the good steering assistance. i think it's still worth it to do the mod, but you'll have to find a better way to lower the oil pressure from the 146 1.7 boxer PS pump without the problems i encountered.