reacp911

A number of years ago, I bought some new tires for my SC. As balanced by the tire retailer, the car was virtually undriveable. So I took the car to an indy porsche specialist. They dismounted the tires individually and rotated them on the rim to minimize the balance weights. Although that did the trick, the whole thing was rather trial and error and time consuming.

I have the same situation on my TA. This car was susceptible to vibrations from new, but now after 47 years I'm finally getting fed up.

I suggested the tire rim rotation method to the tire retailer (well know race car supplier) but he looked at me as though I just arrived from outer space.

Anyone know of a vibration specialist in the GTA?

Anakin Skywalker

Is it possible there is a ding in one or more of your rims? I take mine to Union Tire off Steeles for rim repair.

Adamant1971

Talk to Tires 23 and have them road force balance your wheels. Many shops have the machine but only some shops take the time needed to do it right.

moab

https://thehankypankystore.com/collections/vibrators

bcrdukes

+1 for Tires 23. They've helped me out on several ocassions related to a wheel vibration at speed. Others on here like CEO Tire but I personally have no experience with them.

Just throwing it out there but could it possibly be your tires that are causing the problem?

reacp911

The service manual shows an 'on-car' diagnostic tool for tires/rims/discs. I wonder if such a thing still exists:

928gt

Any decent shop that has a road force balancer will be able to detect and hopefully correct vibration coming from the wheels themselves. A road force balancer essentially applies the same force that the car would experience while driving on the road via a roller - like the one in that prehistoric diagram from the service manual - on the tire and wheel assembly, but it is done off the car, on a much more precise and sensitive piece of equipment so there's no guesswork involved. It will also detect any dings or bends in the rim as well as lateral runoff.

I can't comment on Tires 23, but my indie P-car shop in Newmarket routinely rebalances the tires at every seasonal changeover (or when you get new times mounted). Braidan Motorsport also does it at their trackside shop at every tire change. Haven't had to deal with vibration in ~10 years now.

Zookie

road force balancer are obsolete tech now and very basic - find a shop with a laser balancer that can scan the tires and wheels topography to find the issues visually

928gt

They are definitely easier and quicker to use, but a laser balancer on its own (like some of the Ranger machines) will not detect sidewall stiffness imperfections in the tire where you may have a harder spot and the tire doesn't uniformly flex. A road force with the same laser measurements but that also applies force to the wheel / tire assembly has IMHO been the only one that will account for every factor including the sidewall flexing.

damage98MO

Must not click link...must not click link...must not click ..must not...must...doh.

blepski

delete