315mm would be very impressive under 15's Every mm counts

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Just Drive It

Cheers Welly that would be cool as i have no idea

Leading 38.10mm and Trailing 41.3mm (1.5" & 1.625")

Ap Site says the piston area is 49.5 although i presume thatas mm squared

Just hope it goes together smoothly on the car now

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Just Drive It

Yeah just had a look on the web Phil and if calcs are right it's 97.5% of the braking power so you were nearly there with your approximation

After driving my mates Caterham at the weekend with an AP setup im looking forward to the reduced pedal travel

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Just Drive It

So it's the combined piston area for one side right? I may have that wrong That's 1.77" + 2.06" = 3.83" square

Normal is 3.93 i think

1% of 3.93 = 0.0393
3.83/0.0393 = 97.5 (1dp)

I dont really have a clue though mate so your probably right

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Just Drive It

Could be I updated the post a bit above with the measurements in inches too, they were on the AP Racing diagram but at the time i thought mm was more relevant

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Just Drive It

No problem Tom, gald to help.

Can't wait to see the pics all built up.

Am I reading the thread right, you have a less clamp force than std calipers?

But you should have gains from the bigger pad area, and disc dia? But with more control because of the calipers?

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Built on 25th November 1998... That was a Wednesday..... Thank God it wasn't a Friday!

RIP - Pete Sims

Yep, but that's not a problem, it's only a function of master cylinder area vs piston area's anyway. You can get more clamp pressure by putting a smaller master cylinder on a standard setup.

He should have more leverage from the discs, less caliper deflection which will give a less pedal travel and more consistant braking.

The larger pad area will only really act as a larger heat sink for high speed braking, to help a little with pad temperatures, and it will reduce pad wear, the actual friction isn't affected much by pad area.
They'll wear more evenly too, and get less pad knock off, which'll reduce the pedal travel some more. They'll certainly feel far better just from that.

Which means you can go down on the master cylinder size if you want more power but with the same pedal travel.

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- Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM me
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Well, we'll find out shortly by the sound of it

________________________________________

- Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM me
Email me!
Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces.

optimism

On the phone here so will update tomorrow at work but yep they are fitted (mighty close though) and so far zero squeal although i have only tootled around until i can bed them in properly Check back for an update tomorrow, they look sweet My thumb hurts now

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Just Drive It

Happy Birthday mate, have a good one

Look forward to the pics

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___=[ 306 RALLYE ]=__

Rallye Pics///R.I.P: T499 HFC///Farewell: T153 JCP <== ==> Welcome: S2000

Cheers guys, thought i would take the day off, cant stand working on my Birthday

Anyhow i have some pictures, sadly i only realised this morning that in my entusiasm to get them on and take the car for a spin i forgot to take some of them with the wheels on Anyhow i will do that tonight

Fitting was not that hard, i had some issues with a siezed nut on one of the brake lines but for some reason this decided to loosen itself over night to my surprise I made a weekend of it and did the rears too so it was sort of a complete brake overhaul

Anyhow here are some pics of the badboys all attached, i got funky with some yellow paint too









Now one caliper wasnt bleeding very quickly so i think it may have issues as it wasnt functioning that well on my test drive I believe there may be a blockage going into the caliper somewhere but i will have to wait till the weekend before i can get a look at that For now i have left the serious bedding in until i can get it fixed, once thats done i can start giving some decent feedback

On another note while doing the fitting i realised the discs could probably go to 315mm quite easily on the current bracket and if i was to offset the whole lot like in Ash's kit i reckon i could go 330mm or perhaps slightly bigger, there is buckets of room further back although as Ash suggested i believe the balljoint would be a deciding factor as to how far back any disc could go

Watch out for the pics with wheels tomorrow

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Just Drive It

where is that pop corn smiley when you need it

looking very tidy

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TEAM HIGH BOOST SUPERCHARGED RALLYE

My Rallye project thread