Toyota brake upgrade clearance

[Jeff G 78]

Yep, those are the right parts.  

[AZDatsun]

Probably just rebuilt the calipers too many times. I shaved them down and now there is no rubbing 

[AK260]

Mine don't have a lot of clearance, but it's more than zero.

Interesting to see you have a spacer in there - what car do you have?

On my ‘77 UK 260z which I think equates to a 280z set up in this regard, I use the vented Peugeot 505 discs which fit perfectly without a spacer but do need to have the centre hole machined out a little to fit the hub centre. One way or another there is faffing about involved :p

EBC part number D117

https://www.ebay.co.uk/itm/EBC-Replacement-Front-Vented-Brake-Discs-for-Peugeot-505-2-2-Turbo-79-92-/122933285926

[Jeff G 78]

15 minutes ago, AK260 said:

Interesting to see you have a spacer in there - what car do you have?

On my ‘77 UK 260z which I think equates to a 280z set up in this regard, I use the vented Peugeot 505 discs which fit perfectly without a spacer but do need to have the centre hole machined out a little to fit the hub centre. One way or another there is faffing about involved 😛

EBC part number D117

https://www.ebay.co.uk/itm/EBC-Replacement-Front-Vented-Brake-Discs-for-Peugeot-505-2-2-Turbo-79-92-/122933285926

The spacer is required when the 1984 Z31 rotor is used with the Toyota V6 4x4 caliper.  There are two spacers - one the is thicker for the 240Z hub and one that is thinner for the 260/280 hubs.  The hubs are scalloped on the 240 and round on the 260/280.  The Techno Toy Tuning spacers like mine have a pilot for the rotor to keep them centered.  Many of the cheaper spacers do not.  Here in the US, getting Peugeot parts isn't an option.

[Racer X]

For what it is worth, when I put this setup on my racecar, no one produced a “kit” and spacers weren’t commercially available. I took measurements, made a drawing, and then had them made at a local machine shop.

Edited September 15, 2021 by Racer X

[Racer X]

36 minutes ago, Jeff G 78 said:

  Here in the US, getting Peugeot parts isn't an option.

Rock Auto 

https://www.rockauto.com/en/catalog/peugeot,1981,505,2.3l+l4+diesel,1227350,brake+&+wheel+hub,rotor,1896

 

[Jeff G 78]

1 hour ago, AK260 said:

Interesting to see you have a spacer in there - what car do you have?

On my ‘77 UK 260z which I think equates to a 280z set up in this regard, I use the vented Peugeot 505 discs which fit perfectly without a spacer but do need to have the centre hole machined out a little to fit the hub centre. One way or another there is faffing about involved 😛

EBC part number D117

https://www.ebay.co.uk/itm/EBC-Replacement-Front-Vented-Brake-Discs-for-Peugeot-505-2-2-Turbo-79-92-/122933285926

 

I did a quick spec comparison between the 505 rotors and the Z31 rotors.  The OD is pretty close, while the Z31 rotor is thicker by 0.078" (2mm), the center bore of the 505 rotor is smaller by 0.193" (4.9mm) and the overall thickness of the 505 rotor when laid flat is 1.63" (41.04mm) which is greater by 0.23" (5.84mm) than the Z31 at 1.4" (35.56mm).  The bolt circle is also wrong, but it appears the ones you pictured have two sets of holes, so maybe they fit?  I don't have my  sheet handy where I measured the spacer thickness, but I recall it being somewhere around .355" (9.0mm).  

I'm sure you are right, but based on the specs I found, I'm not sure how the 505 rotor would work as the overall thickness is somewhere around 3.5mm off compared to the Z31 rotor and spacer combo.  Maybe the US spec 505 is different than the UK spec 505???

Edited September 14, 2021 by Jeff G 78
Added info

[AK260]

Wow, I take my hat off to you sir! That’s proper analysis!! [emoji106]

I really don’t know the full details as I simply bought them from a (now retired) UK club trader as a kit, complete with the S12W callipers and pads. This side of the pond, it’s a time honoured package with, as you say, just the machining of the centre hole required for 77-78 models. But I believe the hub config is different on the earlier models and needed some spacer arrangement.

Having said all that, thank you for the detailed comparison!! It will be useful to others in the future potentially weighing up the two options.

I will have to take pictures next time I have the wheels off.

As a matter of interest, what year / model is your car? I am assuming 78 given your call sign! If 78 then I wonder if the hubs on a late 280 are different to a late 260!? [emoji848]

[Jeff G 78]

25 minutes ago, AK260 said:

As a matter of interest, what year / model is your car? I am assuming 78 given your call sign! If 78 then I wonder if the hubs on a late 280 are different to a late 260!?

I have a 78 280 and a late 74 260. I have the swap on the 260 which is a race car. Look at the hub in my pic. The face is round which is different than the 240 and early 260 which have scallops between the wheel studs. The early hubs are thinner which means the brake rotor hats taller. The 240Z spacers are around 0.625" thick. 

[AK260]

I have a 78 280 and a late 74 260. I have the swap on the 260 which is a race car. Look at the hub in my pic. The face is round which is different than the 240 and early 260 which have scallops between the wheel studs. The early hubs are thinner which means the brake rotor hats taller. The 240Z spacers are around 0.625" thick. 

Thanks for that explanation Jeff! [emoji106]

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