Tech Talk & Articles > AMCCA Members Tech Talk
SMS is finally settled in at the new place
silverz:
Hi Chris,
Apologies for the long delay as we are moving house in a few weeks so hadn't got the chance to really give the Z a high speed run. It's all running great and interesting to hear some of the behind the scenes detail above. How embarrassing but, to return the car for follow up fixes only to find both were pre-existing conditions. For those interested in some of Chris's trouble shooting, the steering rack was upgraded to BMW as the original conversion rack had wear induced steering wobble. I noticed there was still a minor wobble after the new rack was fitted. It turns out the original rack wear wobble was also masking a warped front brake disc. This car had never had a combination of new discs and new pads and so with the newer 19" alloys there were last minute clearance issues. With some clever and tricky solutions by Chris and Toby all vibration and clearance issues were sorted without resorting to spacers.
The other issue was a scary vibration that progressively got worse from 80kph up through 120kph when the whole car felt like it would shake apart! Who couldn't blame me for thinking the driveline was misaligned or the shortened tailshaft was out of balance? I have had the Camaro up to 210kph, (under strict safety conditions, of course ....or was it the M4?). With its streamlined nose, 2% drag coefficient and a 22 degree raked screen, there is no wind noise, no vibration and only a bit of engine and tyre rumble. I don't know how you found it Chris, (clicked the heels of your magic red slippers 3 times?) but again another pre-existing condition! At some stage in the past the mag wheels had been refitted without the centering hub rings! Once I refitted these it was an instant $20 fix!
Interestingly while chasing hub rings, I found a company, BSA wheels at Norman St Peakhurst who handle all sorts of machining related to wheels, spacers and axles. They offered to machine up custom rings on the spot for around $100. Mine turned out to be off the shelf at Bob Janes. I have now tried the car out up to around 125kph without any vibrations. I was going so fast I thought I saw a vapour trail? (or bladder control issues again?). I was tempted to try the Rolls Royce "balance the pencil smoothness test" but didn't want to drop my Chiko roll or spill my cappuccino.
Thanks again Chris and Toby.
Cheers, Bob. www.tropicanapress.com.au
LeighP:
I've seen a couple of cars "fixed" of vibrations by fitting hubcentric rings.....nice to see it was a cheap fix. :exactly:
Jethro:
Hey Chris, Me and the Mrs are looking at going to the states next year and while over there might look at picking up half decent a C10 and sending it back for the young bloke (he;s a apprentice chippy) been looking at C10's for sale at say about 10K to purchase, then 3 -4 k bring back ? Mick And Yvette and say 2k getting it up and registered ? what say thee ?
Jethro
69DirtyRat:
sounds like a good plan to me! What year u thinkin?
sms777:
Hi Jethro,
What model C10 are you thinking about?
The reason I am asking because if it's before '72 it makes it a very simple process to register since only a couple of ADR's applicable. It will still cost roughly 2k for initial rego thanks to stamp duty and number plate issue. Also your green slip is higher because first time rego.
Cheers, Chris.
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