As title please? making some enquiry's!

 

382 i think

 

you can get 382's under most 18's cant you??? I had them on me old escy!



Chris

 

362mm is the biggest that would fit mine!!!!

 

Depends on your budget - 378 x 32s is the biggest size that will fit behind 18" MOs. Depends what sort you want, but expect to pay £3-4k for the top quality water-cooled ones. Probably get the budget "red" calipers / 378mm discs / brackets for around £2k ish.

The discs have to be floating though.

 

what is floating???

 

Instead of have holes in the disc where it mounts on to the bell, it has slots, where oval shaped bobbins are inserted (with bolts running through these). The bobbins are slightly smaller than the slot in the disc, which enables the disc a certain freedom of movement (hence "floating"). This is essential with such large discs, as the expansion and contraction would cause the bolts to shear. Also the leverage effect of applying the brakes would put a high load on the bearings and cause pad "knock off" (where the pistons are forced back into the calipers under hard cornering). This freedom of movement prevents this.

 

thanks mike
interesting read

 

thanks Mike.

 

THey make a bit of noise though which you have to get used to. Mine are 355's

 

It's not how big your disks are, it's how many pots your callipers have!!! Isn't that true Mike!!!

Mine are 380 x 32 Brembo jobbies!!

Plus these water cooled callipers, are they really at there best when not being cooled by water. I mean an old school 911 engine is designed to be air cooled and runs very well with out over heating with just air cooling. A bit like air cooled brake callipers.

We all know how we'd get on if we ran a water cooled engine with no water in it, as it's not designed for that it would overheat. Surely as water cooled callipers are designed to be water cooled, when no water is used is this not going to have a detrimental effect on brakeing performance. Of course I am talking about heavy useage here, and as Mike you will never go fast enough to get yours hot, maybe this will never be a problem for you.

 

i believe big brakes ISNT the way to go
is these brake rotors (which aint light) are acting as massive flywheels

 

Actually Sean, you should speak to Steve Scott, he now has the same 8-pot Brembos that you are talking about on his WRC rally car. His comments? They're nowhere near as good as his old WRC AP 6-pots (like I have on my car ) . So it proves that quanitity is not always as good as quality .

If you read the AP blurb, it is not necessary to connect the cooling part up - this is really only usually connected when the system is used by rally drivers that are doing lots of continuous left foot braking. I have yet to experience fade, and although my car might not be powerful enough to experience this, what it lacks there it makes up for in weight (bit like yourself ) .

 

Gareth,
This is true, I REALLY noticed the gyroscopic effect the larger discs had when I first put them on, but now I don't notice this effect - but the braking I couldn't do without now - it is truelly incredible!

 

i must be honest mike, i have never faded my 330mm rotors and 4pots,

 

are we talking about mike on his brakes? or mike on his missus! ;cry:

 

Gareth,
How many track days have you done?

Dave,
.

 

one in my cosworth

 

I rest my case .

 

so what you're saying mike is the 355's are best!
sean you can measure the car up at totb!going to use charge-cooler upgrade kit that i have in the garage,pump,rad etc.....

Justin

 

Justin,
Yes, as you can get away with running 17s!

 

Justin, I intend to be pissed all the way through the TOTB weekend. So then may not be a good time to ask me to measure anything!! Plus lets not forget its a Sunday and those are quadruple time where I come from.

 

sean,
fair enough!ill be there from sat afternoon so iam going 2 be well rubber!we could always get the ribena kid to measure up,that way we wouldn't have to jack up the car!lol...that right mike!...

 

I wouldn't have said so.

Surely it's about pressure over a specific surface area?

I remember my GCSE Physics

 

sean,
fair enough!ill be there from sat afternoon so iam going 2 be well rubber!we could always get the ribena kid to measure up,that way we wouldn't have to jack up the car!lol...that right mike!...

 

I was pulling Mike's leg Rich as he always wanted 8 pots, but had to settle for 6's.

It's actually a lot to do with leading edges. The leading edge of the pad has a lot to do with the initial bite and feel when brakeing. The 8 pot Brembo's use 4 pads per calliper, hence twice the number of leading edges.

So Mike I have more pistons

and I have double the number of leading edges