944hybrids Forum
Wed Jul 22, 2009 11:30 am by gt1scca
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RX7 Caliper Swap
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RX7 Caliper Swap
I will be working on the rear Big Brake upgrade to compliment the Lexus Front swap soon. I'm diggin these calipers, just like the Lexus Ls430 calp, these are substantial and lightweight all alloy .....and 160 bucks for the pair loaded with pads...
Stay tuned


xschop- Posts: 400
Guru Status: 11
Join date: 2009-06-09
Location: OKC
Re: RX7 Caliper Swap
Sweet, i back you up in this!

modenas- Posts: 46
Guru Status: 0
Join date: 2009-06-09
Location: lubbock tx
Re: RX7 Caliper Swap
Looks good!
Just out of curiosity, why are we not just bolting front 951 calipers on the rear?
Just out of curiosity, why are we not just bolting front 951 calipers on the rear?

Porch- Posts: 67
Guru Status: 2
Join date: 2009-09-03
Re: RX7 Caliper Swap
PORCH said...........Looks good!
Just out of curiosity, why are we not just bolting front 951 calipers on the rear?
Chop's reasoning........160 bucks for the pair loaded with pads...NIB and included shipping!
Just out of curiosity, why are we not just bolting front 951 calipers on the rear?
Chop's reasoning........160 bucks for the pair loaded with pads...NIB and included shipping!
Last edited by xschop on Wed Nov 04, 2009 10:52 am; edited 2 times in total
xschop- Posts: 400
Guru Status: 11
Join date: 2009-06-09
Location: OKC
Re: RX7 Caliper Swap
Ohh, i see! Are the front 951 calipers that expensive?
Anyways, i guess it makes more sense if you don't already have a set of 951 calipers
Anyways, i guess it makes more sense if you don't already have a set of 951 calipers

Porch- Posts: 67
Guru Status: 2
Join date: 2009-09-03
Re: RX7 Caliper Swap
Rebuilt 951 calps and new pads are up there....$$$
My trusty swap manual is at home. What are the 951 front piston sizes again?
Also, anyone know the 951 pad dims?
On top of that another 7-8mm can be trimmed off the face of the RX7 calps if needed for more rim clearance, but looking at the 951 front calp pics, those calps accept a wider rotor and look like there is less rim clearance on those even in that dimension.
My trusty swap manual is at home. What are the 951 front piston sizes again?
Also, anyone know the 951 pad dims?
On top of that another 7-8mm can be trimmed off the face of the RX7 calps if needed for more rim clearance, but looking at the 951 front calp pics, those calps accept a wider rotor and look like there is less rim clearance on those even in that dimension.
xschop- Posts: 400
Guru Status: 11
Join date: 2009-06-09
Location: OKC
That Damn 86T again.....LOL
I found the info I needed on piston sizes, I just am curious what the brake pad size comparison is between rear Brembo Turbo calipers and these RX7 calipers....
Porsche Piston Sizes for Early Brembo Calipers......
928 86- VIN#F 92GS8 61000 - model year 87: Front Caliper 42mm and 36mm
Rear Caliper 30mm and 28mm
88 Front Caliper 44mm and 36mm
Rear Caliper 30mm and 28mm
930 and Carrera Turbo look: Front calipers: all 38mm pistons
Rear Calipers: all 30mm pistons
944 Turbo:
Front Calipers:
'86 Turbo 38mm and 36mm
'87-88 Turbo 40mm and 36mm
'88 Turbo S 44mm and 36mm
'89 944 S2 up to VIN # >> 94KN4 51880 40mm and 36mm
Rear Calipers:
'86-88 Turbo and Turbo S 30mm and 28mm
'89 S2 up to VIN #>>94KN4 51880 30mm and 28mm
EDIT: I just checked and the RX7 calps are tapped M10 x 1.0 for the stock 944 brake lines even
Porsche Piston Sizes for Early Brembo Calipers......
928 86- VIN#F 92GS8 61000 - model year 87: Front Caliper 42mm and 36mm
Rear Caliper 30mm and 28mm
88 Front Caliper 44mm and 36mm
Rear Caliper 30mm and 28mm
930 and Carrera Turbo look: Front calipers: all 38mm pistons
Rear Calipers: all 30mm pistons
944 Turbo:
Front Calipers:
'86 Turbo 38mm and 36mm
'87-88 Turbo 40mm and 36mm
'88 Turbo S 44mm and 36mm
'89 944 S2 up to VIN # >> 94KN4 51880 40mm and 36mm
Rear Calipers:
'86-88 Turbo and Turbo S 30mm and 28mm
'89 S2 up to VIN #>>94KN4 51880 30mm and 28mm
EDIT: I just checked and the RX7 calps are tapped M10 x 1.0 for the stock 944 brake lines even
xschop- Posts: 400
Guru Status: 11
Join date: 2009-06-09
Location: OKC
Re: RX7 Caliper Swap
xschop wrote:I found the info I needed on piston sizes, I just am curious what the brake pad size comparison is between rear Brembo Turbo calipers and these RX7 calipers....
Porsche Piston Sizes for Early Brembo Calipers......
928 86- VIN#F 92GS8 61000 - model year 87: Front Caliper 42mm and 36mm
Rear Caliper 30mm and 28mm
88 Front Caliper 44mm and 36mm
Rear Caliper 30mm and 28mm
930 and Carrera Turbo look: Front calipers: all 38mm pistons
Rear Calipers: all 30mm pistons
944 Turbo:
Front Calipers:
'86 Turbo 38mm and 36mm
'87-88 Turbo 40mm and 36mm
'88 Turbo S 44mm and 36mm
'89 944 S2 up to VIN # >> 94KN4 51880 40mm and 36mm
Rear Calipers:
'86-88 Turbo and Turbo S 30mm and 28mm
'89 S2 up to VIN #>>94KN4 51880 30mm and 28mm
EDIT: I just checked and the RX7 calps are tapped M10 x 1.0 for the stock 944 brake lines even
So what all do we need?
Dawgz83948- Posts: 95
Guru Status: 2
Join date: 2009-06-09
Location: Ceres, Ca.
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