2 piston front calipers on 77 280z

[MH77280Z]

Hi Guys, were these standard on 280z? any thoughts about the 2 piston calipers.

I have replacement calipers in the front from Oriellys but my originals which I plan to rebuild are 2 piston per caliper etc.

[SteveJ]

Stock is a single piston design. You can see that caliper in the FSM or parts manual.

It sounds like your car may have had the Toyota calipers installed. http://www.zhome.com/ZCMnL/tech/Calipers/toyotaCalipers.html

I'm not sure why they are called 4 piston in the Zhome article.

[MH77280Z]

22 minutes ago, SteveJ said:

Stock is a single piston design. You can see that caliper in the FSM or parts manual.

It sounds like your car may have had the Toyota calipers installed. http://www.zhome.com/ZCMnL/tech/Calipers/toyotaCalipers.html

I'm not sure why they are called 4 piston in the Zhome article.

Just looked at mine and each caliper has 4 pistons. Thats why probably. Let me try to find any part number on them and will post.

[jfa.series1]

25 minutes ago, SteveJ said:

Stock is a single piston design. You can see that caliper in the FSM or parts manual.

It sounds like your car may have had the Toyota calipers installed. http://www.zhome.com/ZCMnL/tech/Calipers/toyotaCalipers.html

I'm not sure why they are called 4 piston in the Zhome article.

Pretty sure this would be termed as a two-piston design, common to S30's. A single piston is common to most recent cars with a floating caliper design.

[Yarb]

Pics? Definitely not factory but could probably help with what you have on the car now. Two sets of Toyota truck calipers will bolt directly on.

[MH77280Z]

Here they are…sorry for the delay.

[SteveJ]

Definitely 'yota calipers. https://www.rockauto.com/en/moreinfo.php?pk=9744180&cc=1272260&pt=1704&jsn=1203

[Zed Head]

On 11/1/2022 at 12:00 PM, MH77280Z said:

 originals which I plan to rebuild 

 

25 minutes ago, MH77280Z said:

 

 

Good luck with that.  Might want to see the cylinders, if you can get them apart, before you buy the rebuild parts.  Pretty crusty.

[MH77280Z]

12 minutes ago, SteveJ said:

Definitely 'yota calipers. https://www.rockauto.com/en/moreinfo.php?pk=9744180&cc=1272260&pt=1704&jsn=1203

So basically dont bother rebuilding, which would need blasting, parts and labor when these are not original and $50 a piece on Rockauto. I thought I had found unicorns

[EuroDat]

1 hour ago, MH77280Z said:

So basically dont bother rebuilding, which would need blasting, parts and labor when these are not original and $50 a piece on Rockauto. I thought I had found unicorns

No. The link Steve posted is for the S12W calipers with the 4x 43mm bores and vented rotors. Your calipers in your post #6 are the S12-8 calipers with 43/34mm bores for the non-vented solid rotor.

The S12-8 calipers are getting hard to find.

S12-8 - 1984-85 Toyota 4 Runner and 1979-84 Toyota pickup

S12W - 1985-95 Toyota 4 Runner

Edited December 14, 2022 by EuroDat
Typo

[Zed Head]

Think about converting back to stock.  I don't know if the conversions involve permanent changes.  I thought that they were just bolt-on pieces.

[MH77280Z]

I am currently running after market calipers from Oriellys. They are 2 piston and stock bolt pattern. planning to continue using those. Will get these rebuild in that case. I think rebuild i am quoted $50 a piece which includes blasting, painting, new kit and assembly.

Edited December 14, 2022 by MH77280Z