[Supras] Steering ratios??

[Hacker J]

The PPS system was only available on 89+ cars.  It consists of the PPS ecu in the right kick panel and wiring that goes to the steering rack (beside the A/C compressor).  It also deletes the steering damper that was fitted to the non PPS cars.

The vac fitting on the pump is for full-lock idle-up to keep the engine from stalling.

PPS alters the assist to the rack, but does not affect the ratio.

Jon
90T

----- Original Message ----

I'm not very knowledgeable when it comes to steering systems. Can anyone
tell me if the steering ratio in the mk3 can be changed or if different
ratios were available in different years? I've heard of folks using a
Mustang rack but I'm not planning to make a conversion like that. What
have others done or can anything be done? My 88T has PPS as far as I can
tell, has the vac. port on the pump so I'm wondering what options there
are.
Most of what I know is trial and error, lots of error and I've yet to
take the Supra steering system apart so I'm a newbie to this subject.

Another gear related question, I've got some drive ratio info (gear vs.
rpm vs. speed) for 3.73 and 3.90 but nothing on a 4.11. Does anyone have
this info?

Thanks,
Brian







 
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