Same problem with my TR4A, at 60mph it vibrates pretty bad. The Wire
wheels have been balanced all round and this had made a big
difference, I need to get them done again though and I know the rims
are a bit suspect! -
Seb
At 9:00 PM +0100 6/18/00, thom kuby wrote:
>Greetings,
>
>Yes...again. I'm getting much closer to resolving this "shimmying & sloppy
>steering" bugaboo. Unfortunately, we're not there yet.
>
>Since the last time I queried this great list, I've tightened up the
>steering box (via the adjustment screw on top of the steering box. I have
>NOT yet played around with the shim setup...) and the steering has improved
>immensely...nowhere near the amount of slop I had before.
>
>But...the damn thing still has a shimmy - only occurs around 60mhp. please
>recall; I've rebuilt the ENTIRE front end. During the initial rebuild, I
>left the steering box alone, which alot of you told me I shouldn't have
>done (and I sorta thought that before)...so, I went back in there and
>performed this first adjustment. The good news is that it does not appear
>that this steering box is the problem. The box looks like its' in pretty
>good shape; no wear on the adjustment screw anyway and plenty of oil in it.
>
>Anyway, Now, I'm thinking the wheel and tire setup might be at fault. I've
>recommended to the owner that he look into some top quality tires like
>Michelins, (or whatever else was std equipment on these things). right now
>he has some cheap tires on it, and the steel wheels were always suspect. I
>understand that the PO drove this car hard, and off the highway, through
>the mojave desert, where I live.
>
>But...aside from the wheel/tire factor, I have noticed something else just
>looking at the car tonight...
>
>This thing LEANS...to the left (pass side). Not much, but its' there.
>
>My questions are:
>1. bad spring? and would this contribute to shimmy'ing? I did NOT replace
>the springs on this job.
>2. I put oem front shocks back on it...should I have gone with Konis?
>again, are these shocks junk? and would contribute to this problem?
>3. or, are these cars THAT squirrely to begin with? (I would find that
>hard to believe...)
>I set the front-end toe, camber, according to the numbers in the manual
>(I'm using the Bentley repro of the factory pub.).
>4. Are these numbers correct?
>5. are some other tricks to getting this geometry right?
>6. Is there a quick way to determine if the frame itself is tweaked up?
>
>Any comments?
>please help...we're getting closer to getting this thing resolved and this
>list has been a huge help. Please remember-we have STEEL wheels on it, not
>wires.
>
>Again, the car's owner and I thank you in advance...
>
>Cheers
>Thom Kuby
>Porsche freak, with a TR3 in his garage
|