[Supras] Progressive PPS years??

[Rockey Fox]

I'm not sure which year it started but there is an
expensive "idle up" valve on the rear of my 91T power
steering pump that has a vacuum line running through
it. As that valve was too expensive to replace when it
busted i've tried without success blocking up the hole
but the pressure must be higher than my hydraulic
sealer and a bolt will hold. 
I'm considering going with an earlier model pump
without that particular goofy threaded hole in the
back plate so I'm also interested to know if the
earlier year model PS pump will work on the 91T.

TIA,
Rockey 91T

--- Dave Koos <dave at azsupras.com> wrote:

> I have no idea how the '89+ non-PPS rack would feel
> in an '88 chassis.  Not sure what else (if anything)
> you'd have to change over to make it work.  The
> pumps should be the same as is the low pressure
> line.  If your '89 DOES have PPS, then you won't
> have it in the '88 chassis as the electrical
> solenoid plugs into the engine wiring harness!!!  I
> seriously doubt the '88 wiring harness has the
> necessary wires to plug it in!!
> 
> Good luck!
> 
> Dave  92T & 84 P-type
> Mesa, AZ
> www.azsupras.com/suprattop.htm
> www.azsupras.com
> 
> 
> ----- Original Message ----- 
> From: Brian Walker 
> To: Dave Koos ; supras list 
> Sent: Monday, October 02, 2006 11:59 AM
> Subject: RE: [Supras] Progressive PPS years??
> 
> 
> Thanks very much for pointing this out Dave, if this
> is the case, I could swap the rack from my 89 parts
> car under Scca rules but what are the opinions on
> the system? It seems like the car would have better
> turn-in, just a matter of getting used to the
> difference. Do you know if the lower speed ratio the
> same as the non-PPS setup?
> 
>  
> 
> Thanks,
> 
> Brian W
> 
>  
> 
> 
>
--------------------------------------------------------------------------------
> 
> From: Dave Koos [mailto:dave at azsupras.com] 
> Sent: Monday, October 02, 2006 2:46 PM
> To: Brian Walker; supras list
> Subject: Re: [Supras] Progressive PPS years??
> 
>  
> 
> Correct, the MK3 didn't get PPS steering until the
> 1989 model year.  The hoses are different between an
> '89 WITH PPS and one WITHOUT PPS.  Your '88s power
> steering rack is different from the '89+ setup. 
> Regardless of being equipped with PPS or not.  With
> the subframes being different, I'm not sure the '89
> non-PPS rack would fit in the '88 subframe.  If
> you're only replacing the hoses, make sure to order
> the hoses to match the production year of your
> Supra.  This will make for an easy and
> straight-forward replacement!
> 
>  
> 
> HTH,
> 
> 
> Dave  92T & 84 P-type
> Mesa, AZ
> www.azsupras.com/suprattop.htm
> www.azsupras.com
> 
>  
> 
>  
> 
> ----- Original Message ----- 
> 
> From: Brian Walker 
> 
> To: supras list 
> 
> Sent: Monday, October 02, 2006 11:13 AM
> 
> Subject: [Supras] Progressive PPS years??
> 
>  
> 
> I was looking up the P/N's for lines of the PS
> system (Thanks Mike for
> the EPC being updated) and the P/N for the PS
> pressure hose lists
> several variations. On listing is for 89-92 w/
> progressive steering. Is
> this something the 86-88 did not include? I had
> always assumed it did
> but have never had to mess with the PS system (was
> planning to replacing
> the old lines)
> 
> Thanks,
> 
> Brian W-88T
> _______________________________________________
> Supras mailing list
> Supras at supras.com
> http://supras.com/mailman/listinfo/supras_supras.com
> 


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