poppyman Posted January 15, 2021 Report Share Posted January 15, 2021 Sounds like money well spent Tony. Link to comment Share on other sites More sharing options...
Nigel Clark Posted January 15, 2021 Report Share Posted January 15, 2021 That's good news! Glad to hear your GT6 is now in great health. Could the steering shimmy at speed be a wheel balance issue? Nigel Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 16, 2021 Author Report Share Posted January 16, 2021 2 hours ago, Nigel Clark said: Could the steering shimmy at speed be a wheel balance issue? That was my first thought but the tyres are new and were balanced by an experienced technician. Link to comment Share on other sites More sharing options...
Clive Posted January 16, 2021 Report Share Posted January 16, 2021 4 hours ago, avivalasvegas said: That was my first thought but the tyres are new and were balanced by an experienced technician. They aren't wire wheels are they? But the speed wobble is most likely something out of balance. Or possibly bent wheel, though that is usually more obvious at slow speeds too. Wheel alignment is a possibility too. As are wheel bearings. Probably worth returning to your tyre place and get them to re-check the balance. (ideally they should spin and check balance once they put the last weight on, and see everything reads zero. But they never do.....) Link to comment Share on other sites More sharing options...
dougbgt6 Posted January 16, 2021 Report Share Posted January 16, 2021 And my Mintex don’t squeak! Not at all, ever, at any speed. Has he left the anti squeak shims out? Doug Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 16, 2021 Author Report Share Posted January 16, 2021 5 hours ago, clive said: Probably worth returning to your tyre place and get them to re-check the balance. (ideally they should spin and check balance once they put the last weight on, and see everything reads zero. But they never do.....) Dunlop 13X 5.5. No bends and the bearings are good. My tyre guy is also very good, so yes they checked to make sure it was zero’d. Car has not been tracked, though I’ve never heard of that causing wheel shudder before. Will get it checked. I have the grab below as the correct setting. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 16, 2021 Report Share Posted January 16, 2021 all you need is this and a tape measure double check your spc as many are only given as static laden ie 150lbs on each seat some GT6 specs are given as unladen , cant lookit up right now or buy a £49 Trackrite from Amazon worth every penny https://www.amazon.co.uk/Gunson-G4008-Trakrite-Wheel-Alignment/dp/B0012M9KEC/ref=sr_1_1?dchild=1&keywords=trackrite&qid=1610794986&sr=8-1 just load the car with rent a crowd and set to 0 side slip takes 5 minutes Pete Link to comment Share on other sites More sharing options...
poppyman Posted January 16, 2021 Report Share Posted January 16, 2021 Plus one for the Trackrite, great bit of kit. Tony. Link to comment Share on other sites More sharing options...
Clive Posted January 16, 2021 Report Share Posted January 16, 2021 7 hours ago, avivalasvegas said: Dunlop 13X 5.5. No bends and the bearings are good. My tyre guy is also very good, so yes they checked to make sure it was zero’d. Car has not been tracked, though I’ve never heard of that causing wheel shudder before. Will get it checked. I have the grab below as the correct setting. I would use those figures EXCEPT camber. I would go for 1degree negative. (I run 1 1/2 degrees negative) You may need some spare shims to get it sorted. Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 16, 2021 Author Report Share Posted January 16, 2021 Thanks Clive. We'll definitely adjust accordingly but I was hoping someone had a factory unladen recommendation lying round. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 16, 2021 Report Share Posted January 16, 2021 the unladen book is out in the cold but get a trackrite and set to 0 its toe in /out side slip that rips of rubber set to zero gives best optimum setting preferably done with driver and passenger onboard the static laden is to achieve the avereage ride height/float of undulating ride will dig the manual out in the morning 1 Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 17, 2021 Report Share Posted January 17, 2021 laden and unladed geometry specifications Epson scan is a nightmare sorry this is the best i can be bothered with after 6 attempts Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 17, 2021 Report Share Posted January 17, 2021 Link to comment Share on other sites More sharing options...
Chris A Posted January 17, 2021 Report Share Posted January 17, 2021 Good afternoon Mr Lewis & Mr Lindsay, I don't want to hijack the thread but just a slight detour, pretty please. Do you have the same laden & unladen figures for a Herald 13/60 by any chance? The wear on all 4 wheels of my 13/60 looks slightly to be more pronounced on the outsides. For the rears would this mean more or less shims? I hope less as otherwise I would need to order some from outside the EU, i.e. Britain. Thanks ever so much, bow, scrape, tug of forelock (well I would if I had any to tuck). 1 Link to comment Share on other sites More sharing options...
avivalasvegas Posted January 17, 2021 Author Report Share Posted January 17, 2021 Many thanks Collin and Pete - will circle back once tracked. Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 17, 2021 Report Share Posted January 17, 2021 2 hours ago, Chris A said: Good afternoon Mr Lewis & Mr Lindsay, I don't want to hijack the thread but just a slight detour, pretty please. Thanks ever so much, bow, scrape, tug of forelock (well I would if I had any to tuck). Happy to oblige, thanks for the humble servility, but a simple: "any chance of the same for Herald?" works here. They don't allow me to put on airs. But it's nice to see a well-bred young man with manners who has obviously been brought up proper. These are from the Service Training Manual, which doesn't make any mention of loading the car with weight beforehand. Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 17, 2021 Report Share Posted January 17, 2021 2 hours ago, Chris A said: more pronounced on the outsides camber and castor does not rip off tread like toe in can there are no unladen figures in the wsm for heralds etc you could apply variance in the 2lts as suspensions are pretty much the same for suspension travel errors the advantage of a side slip gauge is it tells you exactly what is going on between tyre and tarmac not going to get my trig book out but you work out how much side slip is in a mile at 3mm toe at the tyre perifery its horrifying thats where the rubber goes 3mm at the rim is aprox 1 deg at the tyre 0.5 deg note good old triumph do not specify at what radius you measure the toe another vote for a slip gauge ...it dosnt matter best £49 to have in the garage Link to comment Share on other sites More sharing options...
Chris A Posted January 17, 2021 Report Share Posted January 17, 2021 Thanks Colin, especially for the young man bit, any chance of a clarification as to wear on the outer edge needing more or less shims,please? Link to comment Share on other sites More sharing options...
poppyman Posted January 17, 2021 Report Share Posted January 17, 2021 4 minutes ago, Chris A said: Thanks Colin, especially for the young man bit, His eyesight is not as it was Chris Tony. Link to comment Share on other sites More sharing options...
Chris A Posted January 17, 2021 Report Share Posted January 17, 2021 Thanks to you as well Pete. I'll have to scratch my head over this tomorrow. Monday is the day of the week my brain is least worst! Link to comment Share on other sites More sharing options...
Chris A Posted January 17, 2021 Report Share Posted January 17, 2021 2 minutes ago, poppyman said: His eyesight is not as it was Chris Tony. In that case don't let him go to Barnard Castle ( was that the place?) 1 Link to comment Share on other sites More sharing options...
Clive Posted January 17, 2021 Report Share Posted January 17, 2021 14 minutes ago, Chris A said: Thanks Colin, especially for the young man bit, any chance of a clarification as to wear on the outer edge needing more or less shims,please? On the rear, you want to add shims to get the wheels parallel. Assuming it really is suffering toe-in. The old "2 planks and a tape measure" works very well.... but the gunsons gauge indeed seems to work. Link to comment Share on other sites More sharing options...
Chris A Posted January 17, 2021 Report Share Posted January 17, 2021 Thanks for the extra detail Clive. I looked at the wear again today and it didn't seem as bad as I thought. Maybe I'm being paranoid, at least l know l might have to buy in some shims. I'm not planning to have it checked until spring but at least l have the figures to pass on to the mechanic. Thanks all. I'll let you get back to the original subject 👏 Link to comment Share on other sites More sharing options...
Pete Lewis Posted January 18, 2021 Report Share Posted January 18, 2021 we need to get tyre wear into perspective edge wear due to camber will take 20,000 miles to show up incorrect toe will rip rubber off in a 1000 and down to bald edges a good while later it is most unlikely with the mileages most classics cover that camber will have any effect on tread wear in rough terms 1deg toe drags the tyre sideways 92 ft THATS WHERE THE RUBBER GOES in most cases of edge wear for normal driving on tarmac never due to camber certainly not castor under inflation will wear tread edges same as over inflation wears the centre Pete Link to comment Share on other sites More sharing options...
Colin Lindsay Posted January 18, 2021 Report Share Posted January 18, 2021 14 hours ago, poppyman said: His eyesight is not as it was Chris Tony. Nor is my memory, Dave. 1 Link to comment Share on other sites More sharing options...
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