DIY adjustable camber ball joints mod

[Martin]

Sounds good - keep plugging away at it

Is this Polo still used for daily driving or is it a dedicated fun car?

[sambb]

Commuter and once a month at the hillclimbs.

[Notso Swift]

Wow a pretty active thread today!
I think you and MArtin are both on the right track 100%
5.5 degrees of castor is great, power steering for the win! I am on 7deg for the Telstar, but with my old Suzuki Swift I could only run about 5 because it was just too heavy (combined with a locked diff) Even though it is at high speed and probably less lock. The golf has been set at 5 but I haven't tested it to find out how it will go

I do run A050's and they don't need as much Camber to work as my old A048r's. Martins Toyo's are a direct competitor for the A048, probably better as they don't drop off the same way (but I have only driven on them one at a Winton 300)
If you ever get the chance to cut the A050 in half and compare you will see it is a very different arrangement in the belts, it is constructed closer to a trended slick. The A050 was designed for the JDM Time attack scene (which is a pretty big deal) and Australia is the only other county to get the tyre. The belts from the side wall do not join the ones on the tread face, the movement between the two is what creates the heat and grip vs sliding with a stiffer carcass. It is also why you can start at such low pressures in an A050

[Martin]

That's very interesting (the A050) - thanking you

[sambb]

Last time out at the hillclimbs guys in crx's and civics were running them at 25-26psi. That surprised me but I followed suit after sliding a round a bit on my first run and it worked. But yeah 25psi sounded low to me but they didn't look low - guess that'd be the sidewall strength.

[Martin]

We start the Toyo down around 24~25 psi cold
When hot they come up to 30~31 psi

The Hankook RS3 we started them at 34psi cold

Every tyre is different

You will find a tyre pyro to be a good investment

You could use nitrogen to avoid the cold/hot pressure difference
But it costs money and can be tricky because you want to start high and work your way down
(if you have to add air at the event you've wasted your time/money on the nitrogen)

[Notso Swift]

Last time out at the hillclimbs guys in crx's and civics were running them at 25-26psi. That surprised me but I followed suit after sliding a round a bit on my first run and it worked. But yeah 25psi sounded low to me but they didn't look low - guess that'd be the sidewall strength.

Front, I start at 22 for 30 hot, but mmore weight on the front, longer event on the other side of the equation lower profile
Rear, I have tried everything from 16 (!) to 28. Now on 22, not enough heat when started high but when you are too low the pressure only gets to 24 anyway (and you thing you might roll a tyre when it is that low - although you never do on the back), so 22 doesn't heat up all the way and only gets to 28 or so, but seems reasonable
I can tell you that the first time I got them I started at the smae place I use to start the A048, (can't remember but I think that was 25 or 26 cold) they got up to 34 and there were not gripping anything like they did with 30 hot

When the golf gets running I will be on 15's and there are lots of choices so I will probably try a stager front to back

[sambb]

by stagger do you mean running wider tyres on the front versus the back? I would have already done that by now but I'm pretty sure my ESP will chuck a wobbly. If I'm to keep the same rolling diameters as 205/50/15 fronts my rears would have to be 185/55 which would be getting too narrow I think and I don't think I could fit that on a 6.5 in rim. But yes I'd love to try it on a tight twisty track.

[Martin]

my rears would have to be 185/55 which would be getting too narrow I think and I don't think I could fit that on a 6.5 in rim. But yes I'd love to try it on a tight twisty track.

I'm running 195 on a 6.5" rim - pretty sure 185 will be ok

Otherwise run the rear with a smaller track
The rear will be a bit more lively the
Not big over steer, just more inclined to rotate

[Martin]

Commuter and once a month at the hillclimbs.

You won't want any more than -1.5 deg for daily usage