Treating her to a little tlc......

[sjb]

Originally Posted by Neil M

Seeing as it's you, these are the ones I fitted: http://www.ebay.co.uk/itm/261212780761

Damn that's a good price, website price is £100 for the set

[sjb]

Originally Posted by spoonz

Which Boxster's are these from? Does it matter if "S" or not?

I am presuming these offer more stopping power than standard, but less than AP's

Are there any complication with fitting, or straight on?

The generally agreed conversion is to use porsche boxster fronts part number 996.351.425/426 and boxster rears 996.352.421/422. Pistons for the front are 40mm & 36mm, rears 30mm & 28mm. If you are a bit handy in the garage it's a very easy job to get a set off ebay and refurb them yourself or porschecalipers.co.uk sell them ready refurb. Yes some may mock that it's a bit Heath Robinson but done right they will look and work like a ready bought kit but save you £££££££££££££££££££££'s I paid £320 for my front set and £180 for the rears which is the usual cost. They will indeed give a substantial increase in stopping compared to standard, I doubt at this level there's much difference to compare between them and the AP's even if the AP's are 6 pots unless someone has tried both. Pad choice could make or break either caliper. As for brembo, if they use them on Ferrari, Lambo's and Porsche then they are good enough for me.
Here's an excellent link that details all you need to know, scroll down to 'additional information' and open that up

http://www.ca-automotive.co.uk/singl...pZD0zMTA1.html

[73CSL]

what discs are you using with these ? ( EDIT: just read that link .. using stock csl discs & machining 5 mm off calliper ?? )

Do you know what the front to rear brake balance is like using callipers from a mid engined car on a front engine one ?

[sjb]

Originally Posted by 73CSL

what discs are you using with these ? ( EDIT: just read that link .. using stock csl discs & machining 5 mm off calliper ?? )

Do you know what the front to rear brake balance is like using callipers from a mid engined car on a front engine one ?

Correct re. the discs and machining.

Regarding the balance / available torque I looked into it and there appears to be no more than 10% difference in aftermarket/OE calipers and their piston sizes, there's an industry standard maybe. I read somewhere that using this set up does alter the balance by 2% but can't even remember if that was to the front or back I was so little concerned with that figure. The fact that for example you can buy 4 or 6 piston AP kits for the front of an m3 and either leave it at that or fit 4 pots to the rear with either 4 or 6 pots to the front shows that IN THEORY manufacturers aren't too concerned that you can mix up the brake balance to the extent that your car becomes dangerous. I fitted a full brembo setup to my '63 VW bus and at first I was locking up the front with gentle braking. I changed the front conti sport contact2's for yokohamas and it can now outbrake even modern hot hatch's!!

My thinking is there are too many variables regarding BBK's and brake balance that include pad choice, tyre choice, tread depth even pressures. My set up comes from a similar weight car with similar tyres sizes and apparently a near 50/50 weight distribution too.

This is a common DIY kit and until I hear someone has had an incident with the rear overtaking the front under braking round a bend I'll stick with it.

The Yanks had a good chin wag about this very issue and after reading it I stopped worrying

http://www.m3post.com/forums/showthread.php?t=699892

mattcslnut has this set up and I think has even been on the track with it, he may pop along and chime in ;-)

[sjb]

p0lar is the guy who sold me the rear caliper brackets and also started this thread,

http://www.m3forum.net/m3forum/showthread.php?t=412927

He knows his stuff and recommends these particular calipers for a balanced upgrade

[mattCSLnut]

Originally Posted by sjb

mattcslnut has this set up and I think has even been on the track with it, he may pop along and chime in ;-)

CHIME !
Indeed I do... I've had this set up now for well over 2 years and 15 000 miles 50:50 Road:Track use... in excess of 100 laps @ the Ring and 10 + UK Track Days. Infact it was the UK Track Days that highlighted the weakness of the OEM CSL brake set up even though I was already running HOT pads, SS braided lines & ATE Racing Blue fluid with the OEM set up on my Cecil. It was the UK TDs alone that made me go for the Pork. DIY BREMBO BBK.
The biggest problem I found with the OEM HOT set up was lack of feel & the On/Off on track nature of the brakes, very imprecise with very little modulation or trail braking possible.
What the DIY Pork BREMBO set up offered me was not only a bigger pad, but also brake feel / finesse ... not to mention weight saving around each wheel
As for back to back comparison with APs ... without a shadow of a doubt the APs are the Daddy of BBK world having experienced them on a CSL first hand however I'd say that a well set up Pork BREMBO BBK on the CSL is about 80-90% of the APs performance for less than half of the initial £££ outlay with much lower consumable costs OEM CSL front discs are about £150 each & a full set of semi decent pads is about £160 all round Ideal for Captain "Tight Wads" like me

[73CSL]

Originally Posted by mattCSLnut

THANX mate... I've had him saved in my eBay "Favourite Sellers" folder for a while now
BTW I'm not a big fan of these brackets he sells which require machining 5 mm off the BREMBO callipers

what brackets did you use for your conversion ?

This looks an interesting set up I'm going to make a note of for the future Its only the issue it migh invalidate my warrenty that I've not done a BBK conversion yet

[mattCSLnut]

Originally Posted by 73CSL

what brackets did you use for your conversion ?

This looks an interesting set up I'm going to make a note of for the future Its only the issue it migh invalidate my warrenty that I've not done a BBK conversion yet

One off custom "MOVIT" inspired brackets which do NOT require any BREMBO butchery
I've not had any Warranty issues with mine Over 60K miles and brakes are not covered by Warranty anyway.

[sjb]

Porschecalipers.co.uk and CA Automotive both do front and rear mounting brackets but I think there is some machining required to all to get them to fit... it can't be difficult to manufacture some that are 100% bolt on as Matt has shown
To be honest it doesn't bother me though, I love a bit of tinkering in the man cave sorting issues like that out

[jay2020]

I have just spent the morning fitting my porsche brembo kit.
Even though I said id keep her standard!

I purchased boxster s calipers from a 2003 car for £500

I also purchased 12mm spacers for the rear 15mm for the front.
Brackets were the issue, I purchased front brackets from creation motorsport, DONT DO IT!!!!! I spent more time machining them and filing them then trying to find 6mm spacers than I did on the job.

They are easily the worst piece of engineering ive ever seen.

I then decided to do the rears at the same time so purchased rear brackets from porschecalipers, they were excellent.

I also used HEL hoses and ATE blue fluid.

the brakes are a world apart from the oem crap :