Club 80-90 Forums

syncropaddy wrote:

Essex Nige wrote:This is mine

...and does it over heat ..... ?

well i've only driven it on the road and no where near over heating.

Seems fair enough. If it works, it worrks. Needs a big VW badge and hubcap on the spare to set ot off
Yours is the same colour as mine, Nige

syncropaddy wrote:

HarryMann wrote:

A difference of 2mm in diameter on a standard tyre equates to 2 revs per mile. Now if the VC detects that then we wouldn't be able to go around a roundabout.

2mm on tread depth is actually 4mm on diameter

Correct but the VC still wouldnt detect that small difference.

I contacted Henning and IG16 about this and this is what they have said in reply ..

"there was a discussion on this recently on IG 16" forum. The answers were not very exact and from what I read I understand that it was a permanent max of 2% planned by VW with some "safety margin". Experiences showed, that 4% allows the VC to live for a long time as well.
Sorry, no exact figures available and the master of knowledge for these things (Harald Holecek) has died a couple of weeks ago"

So 2% on a 185/14 tyre is 13mm on diameter. That is the difference between a new tyre and a bald tyre. Do these stickers on the dash boards really mean 2% and not 2mm?

v-lux wrote:Cant find it at the moment, but i remember seeing a picture of VW warning sticker in someones van saying that rolling circumferences must not differ by more than 2mm.

Have a sticker on my windscreen says 2mm max
Have a sticker over my fuel filler says 97
Believe they are original


Mick

Hi Mick,

2mm max

Does it say tread depth or diameter or rolling circumference?
and that is an ex-Swedish utility company 16"?

Thanks

Would have thought any sticker would be more likely to quote mm tread deapth rather than anything else as thats both easy for people to measure (tyre dia isn't with great acuracy) and for tiny brains to understand (met a few engineers who can't work out a percentage!) - for the tiny brain test you really need to look at what advice was offered to US customers.

My van had odd [road] tyres and nackered CVs when I got it. used it as a good excuse to buy a nice set of BFGs - transmisson seemed to feal nicer on the new rubber and the one remaining dodgey CV didn't click as much after though it still broke soon after - don't think that really proved a lot, though maybe no noticeable coralation is another vote towards "it doesn't matter so much".

Still, I like to keep my 5 tyres rotated and even, at the corect presures, as it can cirtainly do no harm towards transmission ware, and balanced cars handle better.

Just to finish of a part of this thread from a page back, talking about bike carriers etc, this is what I have done.

I cut up a boat trailer I had lying around and made this. Cost about 100 quid in metal and ply. Used the rustoleum I had from doing the syncro.

The idea is that we can transport safely four bikes, which only uses half the trailer. This takes the strain from the already overloaded rear springs. Its a bit of fun that amuses people when they pass us on the motorway, it is weird being in the slow lane and not in 2 or 3, but I guess that is better for everyone.













Oh, the rack folds up out of the way.

Al wrote:Cant find it at the moment, but i remember seeing a picture of VW warning sticker in someones van saying that rolling circumferences must not differ by more than 2mm.

...and Glenn says tread depth is the obvious parameter for them to specify, easiest for driver to check

Well, to complete the story, (from the $119 VC thread) the original spec seems to have come from Prof. Peschke, and he mentions 3mm after some back of fag packet calcs based on a 5 rpm VC differential speed, so there was probably a safety factor applied and then a spec issued for (only) some customers (interested parties).

So if 2mm seems a bit small, then know that 3mm (1/8") is likely quite OK with a good* VC.

* Ambient front-diff running temp must be signifiantly below hump/STA temp is what's important

i have missed most of this post but my swedish doka has the before mentioned sticker on the inside of the windscreen:

i have misslaid my swedish instruktionsbok so i havent yet found the reference.
but monsterdjupsdifferens= tread depth difference and max 2mm speaks for itself.
it is a 16" which may have some bearing on it.

Makes you wonder why only some Syncros got that sticker and others didnt ..... Even looks like a locally made sticker without any VW markings.

Monster! I bet Mr Baxter hasn't got a bitmap of that sticker
The T3 outline looks quite accurate though, right down to the little step on the scuttle panel. Local supplier to VW Sweden, like you say?

silverbullet wrote:Monster! I bet Mr Baxter hasn't got a bitmap of that sticker

Technically that photograph is a bitmap of the sticker

A vector file of it would be far more useful.

Computer dorks
I still bet he hasn't got one of your lah-di-dah vector things Jake

silverbullet wrote:Computer dorks

Well you engineer lot love to turn any conversation unnecessarily technical, so I thought I'd join in

It's all in the details. We love the details! it's a right brain thing, all engineers are marginally autistic obsessive compulsives (see my driveway for more details)