mcossie

hello mate

I have a choice to fit on my escos 330x28 or 355x32 AP discs with porsche 996 big calipers.... I have rondell's 18"

What do you think about this disc's size ???

regards.........

foreigneRS

don't go bigger than you need to. you will increase unsprung weight and gyroscopic affect that has a negative effect on handling.

in my opinion, 330 is easily enough for a stg 1

Mike Rainbird

iTrader: (3)

What he said. Biggest is not always best .

JHS

iTrader: (1)

You havent got the weight difference between 330 and 355 discs by any chance?

Mike Rainbird

iTrader: (3)

Go on AP's website, www.apracing.com , they list all the weights .

JHS

iTrader: (1)

Thank you

mcossie

for the weight, it's 5.2 kg and 6.7 kg without bells....

Mike Rainbird

iTrader: (3)

It might not sound like a lot, but as it's increased weight will give a greater gyroscopic effect due to it's inertia - think flywheels (which will resist any change in the direction of its rotating axis), it has a noticable effect on steering feel and turn-in ability (I noticed this immediately going from 330mm to 378mm discs, but have got used to it now), also with it being unsprung weight*, it is the worse place to put it.

* http://en.wikipedia.org/wiki/Unsprung_weight

mcossie

also, what many fit 378 in place of 330 ???

it's just (for the look) ???

Mike Rainbird

iTrader: (3)

In my case, it was to stop 480bhp on numerous TRACK days. If I only used the car on the road, I would have kept it at 330.

mcossie

I understand... I use the car only on the road...

So I think, I fit 330 mm

Thanks for all for your post...

foreigneRS