Ispeed

I bought a set of '89 GT 17mm spacers from Dave C. They have their own studs, so you need 10 more lug nuts.

ColinB

Rob
I'm not at home now and can't remember how the studs are secured to the spacers but they are probably screwed in from the back and the heads of the studs face up against the hub to prevent them from unscrewing when you tighten the wheel lugs. You are correct in assuming you will need another 10 nuts to secure the spacers. Note also that the space-saver spare wheel can't be fitted to the spacers and the spacers are not always easy to remove at the roadside. Solution, put the space-saver on the front and the front wheel on the back. BTDT. It's not a quick procedure.

Colin. 89GT.

Peter F

Congratulations Rob on the new wheels

Can't wait to see how they will look reanodized, what is the cost for this process?

Cheers/Peter

Garth S

Rob,
Enjoy the new wheels - still my favorite on a 928!

Just my opinion, but I would really have to be intensly in love with the RDK system before cutting into a set of CS wheels - for all I've read of its utility, I would electronically bypass/trick the system into believing the sensors were in place ... and toss the sensors.
If you do proceed, I would do a lot or trial fitting at the rear to be certain that it would work with a spacer.

Bolt on spacers have their five 50mm studs pressed in from the back, and slip over the existing 50mm studs on the rear hub: You do not need 10 more standard lugnuts - for open end lugnuts are used to clamp the spacer to the hub. I have a 28mm spacer set up like this on the rear.
The open end nuts should be supplied with the spacer .. and the spacer should be machined to have the hubcentric ring.

Kolbjorn S

That's also how my interest got sparked and eventually I ended up getting a set some time back ... lets see, is it us buying Garth a beer or him getting us one (perhaps one per wheel)...

marton

Yes, but they are hard to find because people often do not know what they are so do not write Club Sport. You have to look at the fotos which is a bit tedious

Marton

Rob Edwards

Peter-

The quoted cost for re-anodizing was $100 per wheel.

Garth-

You're probably right about the RDK sensors being more trouble than they're worth, but they work quite well on my car (so far!), and I've got an extra set of 8 sensors from the wheels that came on the car. And this way they could appeal to any GT/GTS owner from '89 to '93. Besides, the sensor holes can always be plugged or re-welded if someone doesn't want them. Machining the holes in was quoted at $160.

Have you priced sensors lately? It'd be $2800 (350 x8) just to replace them. I don't think I'll be throwing them away.......

dr bob

Rob--

Before you spend big on the RDK install, consider the tires you'll be running and what their required pressures are. The PS2's I use aren't available in 16" sizes, but the 17" sizes get 36 in the rear and 34 in the front for most driving. I add a couple pounds for serious Hwy 2 trips. Any more than that in the rears means they wear out a stripe down the middle. Anyway, 'modern' tires take less pressure, certainly for the speeds we drive. I suspect that the RDK will annoy you enough to disable it unless you use original tires. I think US cars came with BFG's, at least mine did originally. Modern tires are head-and-shoulders beyond what the car was originally designed for.

Heads-up: Angeles Crest Hwy is being resurfaced.

Rob Edwards

Bob-

The truth of the matter is that I would need to join POC or Driving Concepts and get some driving lessons under my belt before I would even consider trying to find the handling limits of this car and wheels/tires, whether it's stock 16's or Hoosier steamrollers on 18's. The CS rims have what looks to be brand new Yokohama's on them, so they will do for the time being. I actually have two sets of rims with sensors now, so perhaps I'll just put the 36 psi sensors in all four wheels. That way there'd be no warning chime until they drop down below 30-32 psi. Just a thought.

Y'know, the other truth of the matter is that we all probably check tire pressures regularly enough that the RDK is a complete waste of time anway. None of us NEEDS idiot-proofing like tire pressure warning systems, and I could jumper the RDK computer very easily, I just like the idea of having it working like Porsche intended. Perhaps I should stop here, I'm having a hard time time coming up with a rational defense for doing this.....

How long 'til the resurfacing is done?

Peter F

Here's my -81S with the 951 set on.
(9" rear and 7" front)


/Peter

jon928se

Rob

I'ld second what others have said about not drilling the CS wheels to install the RDK sensors. It just seems a shame to molest the wheels to install what seems generally to be a not very reliable system. Plus many people find that modern rubber means a good rear tyre pressure for the 245/45 tyre is around 38-40psi not the 44psi the sensors are set at.

Just my 28c worth, YRDKMV

Rob Edwards

Well, Mark Anderson has clearly been reading the board this morning- I got a PM from him asking whether I REALLY wanted the rims sent to the machinist, and based on the consensus, I told him not to drill them. So they're off to the wheel shop for cleanup and re-anodizing. I will post pics when they're all pretty!

A sincere thanks for all the input, and for saving a set of CS wheels from my questionable judgement!

-Rob

Ispeed

I would not want to add holes to CS wheels. And I second what everybody says about less psi in today's tires. You will get a harsher ride, less traction and uneven wear with too much pressure.

dr bob

I'm not sure how fast they are going. I've been gone for almost six weeks with the Tahiti adventure and then going to Florida for a few weeks to pay for it. Came home, mowed the lawn and fed the cats, took a drive. The lower/southern section is new on both sides from La Canada (That's the L.A. end of the highway to Canada...) up to Angeles Forest Highway intersection and the turn towards Palmdale. Continuing on Hwy 2, old surface for a few miles, then just the SB side between there and the Upper Big Tujunga Canyon Road intersection. There are sections where the NB side is being done, but it looks like they will finish the SB side before they get at all serious about the NB side much more. Keep in mind that the stuff past Angeles Forest is just for hikers, bikers, and us. The north/east end is still closed at the top of Azusa Canyon dur to slides that are now a few years there. I sometimes wish they'd reopen the road rather than spend money on new pavement, but then the road would be full of tourists with blind spots where a rear-view mirror might normally be placed. We have friends in Big Bear, and Hwy 2/138/18 is a pretty interesting way to make a couple hours of freeway trip take all morning in the hills.

Anyway, I'll be checking their progress regularly until there's snow up there. I'll keep you posted.


On your POC/etc-- Get out to Willow Springs some time when Jim B is instructing. The trophies and plaques on the wall suggset that he's a pretty competent instructor out there.

Kevin in Atlanta

There are a set of 8's and 9's on my ex-86.5. I might be able to get them. What are they worth to you?