air.mech23

Yet another brake thread form me!!

As above, will AP 6pots fit under my 18" OZ superleggeras?

Somebody must know.

scooby-k

they fit with my oz P1 wheels so you should be okay. I have the 355mm disks as well.
ken

air.mech23

But are they the same wheel??

Godspeed Brakes

iTrader: (259)

The kit we supply with the AP 6 pots will fit under your wheels , the bells we make have the most offset you can get before hitting the track rod end , so this gives maximum clearance for wheel to calipers
I can supply you a 355mm kit with AP 6 pots and Ferodo DS2500 pads for £1250

Cheers Ian

ilogikal1

Now this one I know

The AP calipers will definitely fit, my neighbour has them on his scoob and tried them over my AP's

air.mech23

Thanks Ian. I really think im destined to get APs. I think the universe is telling me something....

What do i get for my money exactly?

Chelspeed

There are three diameters of AP discs used with AP 6 pot calipers, 330mm, 355mm and 363mm I think. There are at least three AP 6 pot calipers used on scoobs, CP5570, CP7040 and CP5555. Asking if a set of wheels will fit over AP 6 pots is an unanswerable question, you need to know which kit it is to answer.

There are thre standard kits, CP5570 caliper with 330mm disc, CP7040 caliper with 355mm disc and CP7040 with 363mm disc, these are the kits intended for use with 17", 18" and 19" wheels respectively. So I suspect your question should be will your wheels fit under the CP7040 and 355mm disc kit.

But you can do almost anything if you try, I've got CP5555 calipers and 363mm discs under 18" PFF7s without clearance problems (just) and with no spacers.

air.mech23

Well not being an expert, i didnt know that. Hence the question!! Thanks for that though.

BIG FUD

iTrader: (84)

AP 6 pots under 18 super leggers fit fine standard sti suspension fitted

Chelspeed

Well thanks for that useful answer Mark.

So the AP 6 pot kit fits. Which AP 6 pot kit is that? The 330mm disc and CP5570 caliper kit? The 363mm disc and CP7040 caliper kit? The R1 yamaha 6 pot kit? Some other random 6 pot AP kit?

Did you read my reply before you posted your very informative reply? Don't know why I bother trying to help if no one takes the blindest bit of notice. T***.

Godspeed Brakes

iTrader: (259)

How to win friends and influence people !

I guess with replies like that , I dont think they will miss your ' help '....

Aztec Performance Ltd

iTrader: (234)

Chelspeeds' first post is spot on and I undertand his frustrations having written such a detailed post to answer the question.

When selecting a brake kit its worth noting that one set of 'AP 6 Pots' can be a quite different in quality to another. Speak to the guys at AP, they are very helpful and will tell you the differences in the calipers etc.

I avoided getting the cheapest AP 6 Pots personally (CP7040

Godspeed Brakes

iTrader: (259)

I would hardly call it ' such a detailed written post ' , 10 lines or so isn't an essay , and no real reason to call the guy a **** ! very OTT responce in my opinion .

Regarding the calipers , personally I think the 7040 calipers are the best ones to use , they have exactly the same size pistons as the 5570 and 5555's , so the performance is the same , the 7040 calipers have much better seals in them , as the pistons come out they are fully covered , unlike the other 2 where the dust seal is in the bore , they offer no piston protection , the 7040 seal will stop the pistons getting chipped , Bob , remember the calipers I reconditioned for you , and the calipers you had after that , I saw the pictures you put up of the pistons , all pitted . The seal on the 7040 calipers will stop that happening.
Also the pads , the ferodo DS2500's are about £95 for the 7040 calipers , and about £180 for the other 2 types , so the running costs are much cheaper.

air.mech23

Thanks for the info Ian, its been most helpful

Aztec Performance Ltd

iTrader: (234)

So because the pistons are the same size it makes the performance the same?

Next thing you know, you'll be saying that the more pistons the better regardless of all the other aspects of caliper design.

What is the RRP on CP7040, CP5570 calipers btw and also 4 pot CP5200?

frayz

iTrader: (7)

The 7040 caliper is less rigid than the 5555, by its very design it has no bridge.

The 7040 is a better road caliper due to its seals but surely if performance was the same then AP wouldnt of bothered making both calipers?

Im not slating the 7040 whatsoever... i own a set and theyre awesome. But not all calipers are equal.

Godspeed Brakes

iTrader: (259)

Bob
Of course the calipers will give the same performance if they have the same amount and same diameter pistons , you will be getting exactly the same pressure onto the pads.

I also dont think that more pistons is better , it will get to a stage that to keep the pedal good , you need to make the pistons smaller , the smaller the pistons , means that the pressure applied to the pads will just be a thin line up the middle , I would rather use a 6 pot caliper with wider pistons so the forces are spread over more of the pad, than an 8 or 12 pot caliper that has a very small piston applying pressure to a small area on the pad.

Most people think that the more pistons the better , I guess its good marketing by the people selling them

Godspeed Brakes

iTrader: (259)

The 7040 calipers are thicker and the 5555 caliper has bridge bolts , its swings and roundabouts really , I cannot tell the difference wether a car has either caliper fitted just by driving it , I dont believe anyone else would , if anyone thinks that the caliper that thick would bend before your bulkhead or brake pedal / pedal box would needs to have a re-think , go and have a look at your bulk head while someone presses hard on the brake , now that is flex

I dont think AP will drop the 5555 calipers , much more profit in selling them , mind you a dicky bird told me that the calipers are being made in India now , if thats true then profits will be comfortable.

MarJay

Not sure that is true. On Motorcycles, you can get billet one piece calipers, or ones made in two halves. The split ones flex a little at the joint giving you less pressure.

No idea whether cars use split ones or not though...

Godspeed Brakes

iTrader: (259)

Thats a poorly designed caliper then to flex that bad , but the 2 AP calipers mentioned above are both bolted together.

dunx

iTrader: (3)

Why don't the manufacturers of 12-pot calipers arrange them in two rows of three on each side ?

Or am I the only one thinking out here ?

LOL

DunxC

Godspeed Brakes

iTrader: (259)

Proper racing type calipers have 8 pot calipers with 4 pads per caliper , 2 pistons per pad , you dont have to reduce the size of the pistons to fight pad taper then as they wear , you dont get the pads wearing in a wedge shape , and as racing cars / rally cars also run bias pedal boxes so you can tweek the master cylinder sizes to suit the application , run too many pistons in a road car and you would lose the pedal , it would be on the floor as it couldn't flow enough brake fluid to move them all