Re[2]: 90QC Widest tires? Susp tweaks? Steering?

["Todd Candey" <tcandey@usr.com>]

     Good point, since in my recomendation a factory front sway bar would 
     be used, perhaps use the one on the car and replace it with something 
     a bit more heavy duty .
     Todd.
     


______________________________ Reply Separator _________________________________
Subject: Re: 90QC Widest tires? Susp tweaks? Steering?
Author:  raf40@oes.amdahl.com (Richard Funnell) at Internet
Date:    1/30/96 03:20 PM


I'd be careful adding a rear sway bar, since it will tend to cause the car 
to oversteer unless you add similar additional roll stiffness to the front 
end as well.
     
I know that shocks don't add roll stiffness under steady state conditions, 
but weak shocks do let a car roll more as you go into a turn.  Your 
description of rolling unless cornered just right leads me to believe that 
additional transient stiffness from stiffer shocks might address your 
problem.
     
>     I personally don't have any experience with wheel/tire combos on this 
>     model, but I think I may have a suggestion re. suspension.
>     If I'm not mistaken, that car did not come from the factory with a 
>     rear sway bar. (if it did, I'm sorry for the bandwidth)
>     So, assuming that the car does not have a rear bar, the most sensible 
>     way to resolve handling probs. would be to add one. The most
>     factory-like way would be to use a set of Front control arms (which 
>     have the provisions for the sway bar) in the rear and add the front
>     sway bar mounts to the rear subframe, then install a front sway bar in 
>     the rear of the car as well. In my opinion, this will tighten up the
>     handling more than anything else.
>     I'm sure other list members will also have suggestions for you. 
>
>     Todd.
>
>
>______________________________ Reply Separator 
>_________________________________
>Subject: 90QC Widest tires? Susp tweaks? Steering? 
>Author:  rsco@lubrizol.com (Robert S. Cohen) at Internet 
>Date:    1/30/96 12:38 PM
>
>
>Hi there-
>
>I've been toying with the idea of upgrading my Coupe's wheels to  +2 (17") 
>configuration. I think a 215/45R17 will fit. Can I go any wider on what I 
>suppose will be an 8" wide rim?
>
>Also, who are the sources for the suspension tweaks I keep hearing about? 
>The coupe rolls/leans a good deal unless cornered pefectly, but FWIW rarely 
>bids adieu to the road. I think I'd like to flatten it a bit.
>
>Oh, one more thing. I get what I think is a pronounced oversteer when the 
>steering is cranked over a good bit when accelerating from low speed (ex. a 
>sharp left turn with oncoming traffic.) is this normal/ correctable?
>
>Thanks,
>Rob
>
>_____________________________________________________________________________ 
>Robert S. Cohen
>
>NewMedia Inc., 503 E 200th Street, Cleveland OH  44119-1545 
>voice 216.481.7900  fax 216.481.1570
>
>The Lubrizol Corp., 29400 Lakeland Blvd  MS 228, Wickliffe OH  44092 
>voice 216.943.1200 x 2012 fax 216.943.7215
>
>Email: rsco@lubrizol.com   rsc2@po.cwru.edu   cohen@nmedia.com 
>____________________________________________________________________________ 
>
>
     
Richard Funnell,
San Jose, California
'83 urQ
'87 560 SL