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Toyota brake upgrade clearance


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Anyone have to shave down the caliper fins? I have 15x7 konig rewind and the fin on those calipers are rubbing.  I have 1989 Toyota 4Runner v6 calipers nugeon 9701550A (97-01550A) and 9701550B (97-01550B)

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Good advice above.


I had to do that to fit my 14” rims and took off a full 5mm off the fins. The way I figure it is that those callipers were designed to stop a two tonne truck and my Z will never stress them enough to need the fins.



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Yes, the Rewinds don't come close to fitting over the S12 + W calipers.  They only need to be ground down at the inner corner, the rest of the fins can stay in place.  I also needed to install longer studs to get proper thread engagement on the Rewinds.  Make sure you have enough threads engaged.  

 

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Thank you that worked I took a flap disk to it and now I got rim clearance. Now my other clearance issue is the rotor to caliper. It’s equally tight on both sides should I file the caliper down slightly to get a little wiggle room. It even rubs a tiny bit on the caliper. 

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Thank you that worked I took a flap disk to it and now I got rim clearance. Now my other clearance issue is the rotor to caliper. It’s equally tight on both sides should I file the caliper down slightly to get a little wiggle room. It even rubs a tiny bit on the caliper. 
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Nice work!!

No back plate?
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On 9/7/2021 at 2:40 PM, AZDatsun said:

Thank you that worked I took a flap disk to it and now I got rim clearance. Now my other clearance issue is the rotor to caliper. It’s equally tight on both sides should I file the caliper down slightly to get a little wiggle room. It even rubs a tiny bit on the caliper. 

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Are those calipers for solid rotors, or vented rotors?
I think there are two versions, aren’t there?

It doesn’t look like you have the brake pads in there.

 

Edited by Racer X
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Yes they are stamped s12w on them 
 

I purchased the following from rock auto.  Are these the right rotors?

1989 Toyota 4Runner v6 calipers nugeon 9701550A (97-01550A) and 9701550B (97-01550B)

and 

1984 NISSAN 300ZX 3.0L V6 
DYNAMIC FRICTION 60067074(600-67074)
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Mine don't have a lot of clearance, but it's more than zero.
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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

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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

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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.

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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 by Racer X
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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 by Jeff G 78
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Wow, I take my hat off to you sir! That’s proper analysis!!

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!?

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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!? emoji848.png

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. 

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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!

Every day is a school day!
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