Caliper upgrade

JohnS · Post by **JohnS** » Thu Jan 01, 2009 11:20 am

Hi ,
I'm thinking about getting my front 'S' calipers serviced but before I do that is it worth upgrading them to 3.2 calipers?
What are the issues - are they a straight swap over? ( I also need to source some but I guess that they should be readily available?)
Many thanks again
JohnS '73 911

pete917 · Post by **pete917** » Thu Jan 01, 2009 3:17 pm

im not sure if they are a straight swap but I think it would be a good upgrade. They are relatively cheap - c £300. Will you go servo assisted too?

Alan @ CanfordClassics · Thu Jan 01, 2009 3:29 pm

Hi John,

They are a direct swap, and you will also need the 3.2 discs, (they are wider). I have them on my 1971 car which has a few more horses than standard and they are fine. But depending on the car I personally prefer the correct S caliper.

Alan

pete917 · Post by **pete917** » Tue Jan 06, 2009 8:41 am

they look nice Alan - what is the finish?

Alan @ CanfordClassics · Tue Jan 06, 2009 7:07 pm

Hi Pete,

Those are anodised as per the original S calipers. The gold one was just me testing different colours to get a match for the later style S calipers (which are only different in several minor ways).

HTH

Alan

ian cox · Post by **ian cox** » Wed Jan 07, 2009 9:04 am

Hi John S,
I have a set of 3.2 calipers and front discs that are only 5 months old. I changed the brakes on my 3.2 track car to 930 turbo ones all round so all 4 calipers and discs are surplus to requirements.
If you are interested in the fornts please pm me.

Vic Cohen · Post by **Vic Cohen** » Wed Jan 07, 2009 11:51 am

My compromise .....stick the S calipers etc in the loft and buy the 3.2 , with decent fluid and standard pads u ll never look back,chalk and cheese for performance ..........i do take Alans point and i guess it depends what u mainly want the car to be used for , mine is mainly road work with very rare track days ......either way foy two penneth its a no brainer ....theyre not quite upt 380 mm front discs on my other Porsche !

hot66 · Post by **hot66** » Wed Jan 07, 2009 12:08 pm

Vic Cohen wrote:My compromise .....stick the S calipers etc in the loft and buy the 3.2 , with decent fluid and standard pads u ll never look back,chalk and cheese for performance ..........i do take Alans point and i guess it depends what u mainly want the car to be used for , mine is mainly road work with very rare track days ......either way foy two penneth its a no brainer ....theyre not quite upt 380 mm front discs on my other Porsche !

Do you have the 3.2's on your S then Vic?

On the few times I take my car on the track, my original S brakes are the weak point. The S calipers do flex quite a bit too.

I'm putting new pads & discs on my car to see if that improves things, but a 3.2 conversion is a possibility in the future

Vic Cohen · Post by **Vic Cohen** » Wed Jan 07, 2009 12:27 pm

Yes i do , happened almost by default at refurb time a few years back backs were seized and everything looked rotten ,when i heard the price felt wud be silly to spend what i had and run out of brakes 1 day ...........i had driven before and reiterate fronts were working fine ...........i do believe its a big step forward, based on age of orinals alloy, as much as anything else................i am not as technical as u so Jaz did the lot ...........................i ll say it again ,good move !

On the national circuit when we had the PCGB 'old cars ' day never hint of fade and really got stuck in ..................i do believe the fluid helps , though most of the time is overkill

left4dead · Post by **left4dead** » Wed Jan 07, 2009 12:41 pm

Mine was converted to 3.2 brake spec. during the last resto and I have to say the brakes are one of the best points of the car (road & track)

Ferry Man · Post by **Ferry Man** » Wed Jan 07, 2009 1:00 pm

left4dead wrote:Mine was converted to 3.2 brake spec. during the last resto and I have to say the brakes are one of the best points of the car (road & track)

Mine was restored to standard brake spec. during the last resto and I have to say the brakes are one of the worst points of the car (road & track).

Vic Cohen · Post by **Vic Cohen** » Wed Jan 07, 2009 1:05 pm

But thats cos its green ...................................

Mick Cliff · Post by **Mick Cliff** » Wed Jan 07, 2009 2:36 pm

hot66 wrote:...my original S brakes are the weak point. The S calipers do flex quite a bit too.

I'm putting new pads & discs on my car to see if that improves things, but a 3.2 conversion is a possibility in the future

My car has 'S' calipers and they are good but not inspirational.
So I decided to go Boxster 4 pots.
Still waiting for a few parts from the US and then I'll get stuck into the conversion...

You'll be able to try mine when it's completed.

gridgway · Post by **gridgway** » Sat Jan 10, 2009 11:41 pm

On the subject of the Boxster brakes, do you stay with the 911 master cylinder or change it?

Graham

Mick Cliff · Post by **Mick Cliff** » Sun Jan 11, 2009 4:49 am

gridgway wrote:On the subject of the Boxster brakes, do you stay with the 911 master cylinder or change it?

Graham

Stay with the original, assuming it's serviceable.