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Porsche Gt3 Calipers

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HIZOKU Proficient

HIZOKU

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Alright i have searched but im a bit confused about how the Porsche GT3 calipers are backwards as such? can anyone clear this up and what is needed to make this work?

i'm looking for a brake upgrade for my car JZX81 normal upgrade is going to r33 gtst calipers and disc to suit, i have done this so it is time for the next step up.

choices are just upgrade to R33 GTR calipers and 330mm rotors but i thought i would rather spend the extra and get something a bit bigger do it once and do it right the 1st time so looking at the 350mm mark with big 4 pot or 6 pot calipers

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Duncan Grand Master

Duncan

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I have the porsche calipers on mine, but the pistons are equal sized (ie no leading and trailing). In my case I unscrewed and swapped the bleeder nipples with the bridge so that it was right way up. All good including plenty of race use.

I have also seen people with porsche calipers with unequal sized pistons. That is a bit dodgy because the small piston comes first not the large one, nothing you can do about it. I would steer clear of that setup

HIZOKU Proficient

HIZOKU

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Ok that is what i wanted to know

Do you have a part number at all or what model GT3 they came off for the equal sized pistons?

and since i have to make a bracket is it possible to swap like LH to RH and RH to LH to put the pistons the right way or something?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Just call up Porsche Melb, you can buy the monoblock over the counter for like $700ea or something.

Issue is getting pads and the rotor to suit, you'll be paying out your arse.

Have a look and see if there is a KSport or D2 kit in the size you are after. It'll be a darn sight cheaper and easier in that form.

HIZOKU Proficient

HIZOKU

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Posted (edited)

Just call up Porsche Melb, you can buy the monoblock over the counter for like $700ea or something.

Issue is getting pads and the rotor to suit, you'll be paying out your arse.

Have a look and see if there is a KSport or D2 kit in the size you are after. It'll be a darn sight cheaper and easier in that form.

Sorry to sound mean but where does it say where do i buy these from?

i can use rotors from a ford BA there 350mm i was even of thinking of using there callipers but the reason i asked about the GT3 was i know of a set (front and rear )for sale for 1200 and was reading up on here on how they are backwards and wanted to know how they are backwards

BRR-GT3-Stop-frt-caliper-only-sm.jpg

Like looking at this pick Big one 1st small ones 2nd flip it right way around is that not the correct way?

Edited by HIZOKU
Duncan Grand Master

Duncan

Posted
Posted

hang on....that pic you posted has different sized pistons. If you run it upside down you will have *more* tapered pad wear because the large piston is at the wrong end.

my caliper has evenly sized pistons so it is fine to run upsidedown

Roy Grand Master

Roy

Posted
Posted

Dunc...forget which way the bleed nipples point. Grab the caliper, orientate the caliper to the side of the car that means when you bolt it to the car the small piston points up and large piston closest to the ground and go from there. If orientating the caliper this way means your bleed nipples are facing down (as will be the case if you use Porsche calipers, Totoyota Supra, RX7 calipers etc etc) then swap over the bleed nipples/interest. If you use calipers off an EVO etc then the pistons will be orientated correctly

If the pistons of your Porsche calipers were equal, then can i ask the reason why you had to swap over the bleed nipples. Are the calipers not symmetrical? Or do they offset the equal sized pistons to one side of the pad???? Seems strange

PS, I would buy those calipers for $1200 for front and rear if you dont want them :) (Provided they are the pics posted, as they are not GT3 calipers!!!! :) )

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