Project Polo - 1min10 around Wakefield

[philthy]

Hoyhoy.

How did ya know, right on the mark, still stopping beautifully, just scary double pumping when doing those sort of times.

That now gives me a problem as to upgrading the brakes, I'm adament as to keeping the originals wheels, me like & it makes her a sleeper.
Brembo & AP Racing can't help me, if Alcons made a kit to suit I would have them tomorrow,,,,
Anyone got an answer.

Hi Eddy,

Might be a bit of a cheat, but you may be able to pick up a set of 17" Denvers from someone with a 6R GTI. Pretty sure they're 5*100.

[kaanage]

Nope - the 6R is 5/112

[vwthunder]

.
I'm looking at the set up you are talking about using the Porshe Monobloc along with the rear up grade.
Me is hoping for a good outcome.

You wont fit the brakes under the stock polo wheels, most 16's wont fit

Also you have to space the wheel out quite far, so you could only run a Max of a 205 tyre

[vwthunder]

This is a stock Polo Gti 16 inch wheel

[Catfish]

Nope - the 6R is 5/112

Not according to the entries on the 6R wheels thread - it's 5 X 100, same as 9n3.

[clubracer]

Mum has a Golf GTI mk5. I have the 9N Polo GTI. The wheels don't fit!!!

[philthy]

Mum has a Golf GTI mk5. I have the 9N Polo GTI. The wheels don't fit!!!

Golf GTI mk5 wheels are 5*112.

Polo 9N and 6R are 5*100.

[kaanage]

My bad - I was quoting from an early 6R discussion where someone said it was 5/112. Checking back, the poster corrected himself, later.

So yes, the 6R is 5/100 and wheels can be swapped between the 6R and 9N3

[Eddy]

You wont fit the brakes under the stock polo wheels, most 16's wont fit

Also you have to space the wheel out quite far, so you could only run a Max of a 205 tyre

Hoyhoy.

Thanks bud, your right, me tried today with a template even with a 15mm spacer no go.

[vwthunder]

Hoyhoy.

Thanks bud, your right, me tried today with a template even with a 15mm spacer no go.

With a 16inch polo Gti, we had to use a 15mm spacer, but it is too close to the inside of the wheel, as the pic shows

[kaanage]

Its takes quite a few laps, there is a stainless backing plate standard to do some insulating.
Do you think that a ceramic plate will do a better job, where from & wouldn't it have problems of staying together.

I just checked my tome for race car prep (Engineer To Win by Carroll Smith - over 25 years old but still HUGELY relevant) where I remembered the insulating backing plate and he suggests that bakelite is a suitable lower tech material.

p.s - If anyone likes the look of my strut braces I may well be manufacturing them after thoroughly testing them on Project Polo... AUTOsports Australia

What are they made of and how much do you expect them to cost?

[clubracer]

I'm going to make my test version from mild steel, but future ones will possibly be from chromoly. I haven't done any stress analysis as yet but once I get some final figures I'll decide on final materials. The main thing is to get them as still as possible with a reasonably low weight. I'm not too concerned about much else. Performance is number 1 priority, not shininess As far as price goes I'd like to think under $300.

[kaanage]

Performance is number 1 priority, not shininess

I'm wondering if you will get enough buckling resistance if you use 4130 chrome moly rather than mild steel since the wall thickness will be much less but then again, you could just leave it thick and make it loads stiffer. Heat treating the welds at the mounts will add a LOT to the cost, I would think.

What would REALLY be great would be the ability to remove the cross bar without removing the mounts by using 2 length adjusters at each mount - any idea what that would cost? Then you could have mild steel struct mounts and a chrome moly 4130 cross bar (4340 would be really good but I think the cost would be silly for the small weight saving)

[clubracer]

Once I weight up the cost/weight ration I'll make a final decision. I dont think people will mind if it's mild steel and only a few hundred grams heavier if the price and performance is right...

[gavs]

Chromoly tends to crack with stress over time, would it be a suitable material for a stress brace? One of the guys at work used to build karts and the chassis made from chromoly had to be thrown out after 1 season due to the metal cracking.

On the note about cooling for brakes, was having a discussion at work exactly about this today and something interesting came up in regards to a new disc material which is glass fibre suspended in an aluminim matrix which gives it strength but also helps to dissipate the heat more effectively than good ol' cast steel.... Anyone else heard of this stuff yet? Apparently DBA might have been involved...