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Help! What brake options are available for S30 Z cars?


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#21 auxilary

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Posted 13 October 2005 - 06:49 PM

no clue. I'm very certain it's not mentioned anywhere in this thread, especially not in the link pointing to modern motorsports. Sorry dude, you're out of luck
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#22 JMortensen

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Posted 13 October 2005 - 06:54 PM

It's definitely not in the FAQ either, so whatever you do don't look there...

Jon Mortensen, owner/operator www.petdoorstore.com


#23 J__

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Posted 13 October 2005 - 10:35 PM

nm. i couldnt find it as a seperate sale on ross's site. auxilary u wrote 86-89 4x4 or 4runner caliper are required. but jmortensen in ur FAQ it says 89-95 4wd pickup or 89-91 4 Runner .... r they the same as long as they have the S12/S12w stamped on the side regardless of the year?
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#24 rudypoochris

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Posted 13 October 2005 - 10:37 PM

Use the ones on ross's site, I use those and they work for sure. Also i don't get why you would want just the spacers, unless you got ss lines, pads, and rotors. But ask him for just the spacers, Im sure he would be more then happy to sellt o you

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#25 zcarnut

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Posted 14 October 2005 - 05:47 AM

With regards to the rear disk conversions: What will be the status of the parking brakes with the different swaps?


I use the '82-'83 200SX rear caliper on my conversions. It bolts up to the Maxima bracket. The stock S30 ebrake cable connects to it and it comes out at a much better angle. Pad area is same as the '82-'83 280ZX calipers.

Posted Image
Steve Golik
Huntsville AL
1970 240Z 1974 260Z 1979 810 2008 G37S
"35 years of Z car ownership"

#26 auxilary

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Posted 14 October 2005 - 07:43 AM

nm. i couldnt find it as a seperate sale on ross's site. auxilary u wrote 86-89 4x4 or 4runner caliper are required. but jmortensen in ur FAQ it says 89-95 4wd pickup or 89-91 4 Runner .... r they the same as long as they have the S12/S12w stamped on the side regardless of the year?

I was checking parts on partsamerica.com, and for 89 4runner is an s12w. for the 92 4runner it shows s13wb:

Posted Image

this is the caliper shown for the 89 4runner v6:

Posted Image

you can see the backwards stamped s12 on it (they mirrored the images, I guess).

jmortensen is correct, up until 91 4runner, the brakes were s12 series. in 92 they switched over to the s13wb. The 94 toyota pickup shows teh same s12 calipers
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#27 Dat260

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Posted 14 October 2005 - 09:05 AM

Here is another one buy Sean73

http://forums.hybrid...ght=rear brakes

(Moderator; can you please transfer this link here, as a complete thread with pics instead of a link.)

#28 J__

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Posted 14 October 2005 - 01:27 PM

I use the '82-'83 200SX rear caliper on my conversions. It bolts up to the Maxima bracket. The stock S30 ebrake cable connects to it and it comes out at a much better angle. Pad area is same as the '82-'83 280ZX calipers.


did u use82-83 200sx calipers over the 280zx rotors?
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#29 Modern Motorsports Ltd

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Posted 14 October 2005 - 01:35 PM

did u use82-83 200sx calipers over the 280zx rotors?


Great effort Auxiliary! Kudo's to you for the work you did.

This started as a great thread, some of the ensuing short versed quick back/forth discussion has created some confusion perhaps. I believe Steve was referring to the 200SX calipers having improved ebrake angle vs. the 280ZX rear calipers. He was not IMO referring to our 240SX rear setup which has fine ebrake geometry as pictured here, no sharp ebrake angles whatsoever.

Posted Image
Posted Image


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#30 J__

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Posted 14 October 2005 - 01:38 PM

I was checking parts on partsamerica.com, and for 89 4runner is an s12w. for the 92 4runner it shows s13wb:



this is the caliper shown for the 89 4runner v6:



you can see the backwards stamped s12 on it (they mirrored the images, I guess).

jmortensen is correct, up until 91 4runner, the brakes were s12 series. in 92 they switched over to the s13wb. The 94 toyota pickup shows teh same s12 calipers


so either one works? is there an advantage/disadvantage to either?
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#31 zcarnut

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Posted 14 October 2005 - 02:27 PM

did u use82-83 200sx calipers over the 280zx rotors?


You can use either the 1982-83 280ZX rear rotor or the larger diameter 1984 300ZX rear rotor. However, to use 300ZX rear rotor you have to also use the caliper support part of the 1984-86 300ZX rear caliper with the ‘82-‘83 280ZX caliper and even then the diameter of the 300ZX rotor must be decreased slightly from 290mm to 284mm. This is still larger them the 1982-83 280ZX rear rotor.

The 300ZX caliper support piece is necesary because it positions the caliper further away from the hub centerline due to the larger diameter of the 300ZX rotor:

Posted Image

The larger diameter of the 300ZX rotor increases brake torque and the using 300ZX caliper support piece increases the distance between the caliper and the axle. This is important if you are considering the CV axle swap.
Steve Golik
Huntsville AL
1970 240Z 1974 260Z 1979 810 2008 G37S
"35 years of Z car ownership"

#32 auxilary

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Posted 14 October 2005 - 03:07 PM

so either one works? is there an advantage/disadvantage to either?

newer models may be a bit lighter. I do not have proof to back this up, but perhaps someone else does?
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#33 Synlubes

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Posted 14 October 2005 - 04:16 PM

Does anyone know the diameter of the front 5 lug 300zx (z31) front rotors?

#34 Dat260

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Posted 14 October 2005 - 06:11 PM

300zx (z31) front rotors?


10.9"

#35 zcarnut

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Posted 15 October 2005 - 05:38 AM

so either one works? is there an advantage/disadvantage to either?


newer models may be a bit lighter. I do not have proof to back this up, but perhaps someone else does?


The S13W caliper is designed for a thicker rotor (25mm) than the S12W (which uses a 22mm thick rotor). As a result, the S13W is wider and heavier than the S12W. The piston area is the same between the two, but the S13W has about 10% more brake pad area.

The S12W caliper works with the 1984-88 Z31 rotor and second generation Maxima (1985-89) rotor. Finding a four lug OEM rotor to use with the S13W caliper has been a challenge. I have used the Saab 9000 rotor but it has to be machined to fit the hub and it also has turned on a lathe to reduce its outside diameter so it will fit under the S13W caliper.
Steve Golik
Huntsville AL
1970 240Z 1974 260Z 1979 810 2008 G37S
"35 years of Z car ownership"

#36 zcarnut

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Posted 15 October 2005 - 05:48 AM

Quote:
Originally Posted by Synlubes
“Does anyone know the diameter of the front 5 lug 300zx (z31) front rotors? “

10.9"


The spec is 274mm which is actually 10.8 inches. Sorry to be so picky but that's what engineers do :)
Steve Golik
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1970 240Z 1974 260Z 1979 810 2008 G37S
"35 years of Z car ownership"

#37 J__

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Posted 15 October 2005 - 10:41 AM

thnx for the info
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#38 24 oz

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Posted 15 October 2005 - 12:20 PM

I have 15 inch rims on my car and theres barely any room between my stock brake calipers and the rim. I want to do the swap with the stock rotors, will they fit or will it hit the rim? And the calipers are s12w from an 86-89 toyota 4x4 correct? Thanks, I really dont wanna mess up.

#39 JMortensen

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Posted 15 October 2005 - 12:42 PM

The stock rotor swap uses 79-85 Toyota 4x4 calipers. It fits under 14" 6 spoke ZX wheels, so it should fit your 15's no problem.

Jon Mortensen, owner/operator www.petdoorstore.com


#40 24 oz

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Posted 15 October 2005 - 03:23 PM

Thanks man I appreciate it




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