Fitted bigger disc on the S

[itsnotanova]

Originally Posted by madmodz

As I wait for the spacer, I picked up some uses rotors from porsche for the rear. These are pretty big at 330mm.

Questions for you guys:
(1) does the S rear disc and caliper fit on the base with no modification?

I though I read on planet9 that you need to transfer S parking brake parts. The thread gave on further info.

I want to try and get the 911 rotors on back of the S and space out the caliper.

You need the S upright/carrier/hub to fit S rotors and calipers on the rear of a base. The 986 S calipers and rotor are the same as a 996.

[madmodz]

Originally Posted by The Radium King

uncertain. I *have* read that base front calipers will fit on the rear of an S and give you more bite (bigger pistons).

Thanks Radium, I read a thread on here about that. Lots of talk too about changing the braking bias.

Originally Posted by itsnotanova

You need the S upright/carrier/hub to fit S rotors and calipers on the rear of a base. The 986 S calipers and rotor are the same as a 996.

Thanks Woody. Do you have both rear calipers loose? I'm curious if the insides are wider due to the thicker rotor. I read your informative article about the differences.

Has anybody actually done a base to S "rear" brake conversion? I know the front conversion is very common,


I haven't started on the rear calipers yet. These 330mm real rotors look so sexy! Nothing sexier then a big brake system on a Porsche.
I'm going to need the S parts Woody mentioned for the base . I will try and get the bigger rotors on both the S and non S to see if they even fit this weekend.

Here's a good link from JFP in PA:
http://www.renntech.org/forums/topic/49299-brake-swap-from-boxster-s-to-boxster-base-model/

[itsnotanova]

I can confirm that the base front calipers will fit on the back of a 996 carrier. It should fit the rear of a 986 S too. I can't say how well it will work though. The front base caliper does have much larger Pistons than the rear S caliper.

The rear base calipers won't fit over the S rotor because of the pins that hold the pads. Maybe if you ground the pins down, the base caliper would fit over the S rotor.

[madmodz]

Originally Posted by itsnotanova

I can confirm that the base front calipers will fit on the back of a 996 carrier. It should fit the rear of a 986 S too. I can't say how well it will work though. The front base caliper does have much larger Pistons than the rear S caliper.

The rear base calipers won't fit over the S rotor because of the pins that hold the pads. Maybe if you ground the pins down, the base caliper would fit over the S rotor.

I read somewhere with the base front caliper in rear of an S model you stand the chance of locking up the rear brake first. Is this even possible? I always thought the fronts did most of the work and the brake bias is set that way. I also heard both the s and base use the same size staggered pistons.