The vented/non vented calipers are different. Saying that a pair of secondhand calipers are cheap. http://www.ebay.co.uk/itm/SIERRA-FRO...item257021b45d


I still think its better to go bigger.

Bob

good set of pads will do you to be honest if your tracking it a lot go for mintex 1155's if its road with the odd track day then 1144's are a nice compramise but you may possibly cook them. at the end of the day the discs can be glowing as long as the pads can take the heat!

I was using ebc green stuff pads, and I only so track days. I'll happily fit better pads too!

Maybe upgrade to 278mm vented discs and Mondeo MKI/II V6 calipers ? :)
Bigger diameter = better heat distribution/resistance.

Price of calipers is same as Sierra's: ebay link

green stuff are not up to track days tbh. if you want to stay with them then go for yellow stuff or the mintex 1155's i had sierra 240vented discs and calipers on mine with 1144's and they never overheated on track days.

i now have willwood's and yellow stuff. i would say the yellows dont have the initial bite like the 1144's did but they work very well once they start to warm up after a couple of laps and i have not got them to fade yet. my old sierra brakes worked very well i only upgraded to willwoods for the weight saving.

That sound like fun, what mods are required to fit to sierra uprights?

You just need 11mm spacers - between caliper and upright (single plates or "bushes" for each bolt), longer bolts (10,9 grade), and sometimes driling hole in upright to 12mm diameter (depends on calipers - Scorpio/Granada Cosworth or Mondeo mkI/mkII V6).





Still need de-rusting and painting... but looks like this ;)

Bolts are M12x40.
I have to drill uprights...

Nice one, I can get spacers made up no probs. Sounds like a fairly easy conversion.

iirc laws of psyics say that the only way for brakes to work is to convert to a diffrent form of energy (heat) so no matter what pad or disc you use heat has to go somewhere.
a grippy pad makes more heat quicker, sintering (adding metal to friction matrial) will pass some of the heat to your caliper etc. making your brake fluid hotter so helps for a short time then cooks the fluid and seals. the best way is to increase the outside area of your disc and help airflow (venting best option)

you can't fight the laws of psyics so just get bigger vented discs :cool:

dont forget the threadlock :)