S12W and Wheel Spacer?

[texasz]

I just thought about something, everyone seems to agree that the S12W Toyota 4 piston calipers with vented discs will not fit behind a 14" wheel and that you must go to at least a 15" wheel.

Well what about putting a wheel spacer on? This would push the wheel out some. Would this allow for the S12W behind a 14" wheel?

How sturdy/stable are the wheel spacers? I will be autoxing my car so I will be hitting lots of turns very hard and would not want any problems.

[kmack]

As long as the spacers do not change the overall center line of the wheel with respect to the orignal car's stock wheel center line, then you will be fine running a wheel spacer. If the spacer pushes the wheel centerline out past the stock center line mark, then you start putting undue stress on the wheel bearings. The amount of stress is dependent on how far outwards the wheel's center line ends up.

[texasz]

So then if I'm understanding this right using the 'stock' slot mags that came on the car and a 1" wheel spacer would give you the room to install the S12W breaks and vented discs. HOWEVER, this would be a bad idea as this would push the wheel out past the stock centerline thus causing other problems.

*shrug* It was just a thought. Oh well, no big deal. I will just get the S12-8 and use my stock discs.

[zed240au]

i drove my car when i first put it back together with 14" 260z mags and was running std discs with toyota 4 spot calipers no problem wasnt till i changed to ventilated and later toyota calipers that i needed 15" rims thats a tight fit though much better than the jag 4 spot calipers i tried know of someone who fitted them but i couldnt work it out the jag calipers are huge

But the later toyota calipers on ventilated discs work a treat

Mick

[g260]

I have S12W with ventilated rotors and I am running 14 x 7" rims with no clearance problems and no spacers. The offset on the rims is 3mm positive. When I used the std alloy 260 rims I had to run a 5mm spacer to clear the caliper.

g260

[Gav240z]

I have a question i have been scouring the threads for. I'm about to get a set of Toyota S12W 4 Pot Calipers. I do not have vented rotors or discs, I do have 15" rims, my main query is getting the 4 pots to work with the standard disc anyone see any problems? I have been told it should work fine. I will probably still buy them anyway as I've driven a car with them fitted and liked the improvement.

PS: on the cosmetic side I want to paint them red :cheeky: any tips on the paint to use I was thinking engine enamel?

[Bambikiller240]

I thought S12W calipers were the ones for vented rotors and S12's were for the non-vented rotors.

I think engine enamel is what you need, unless you have them powdercoated.

[Gav240z]

I have been told by the seller who owns a Z wrecker here that they should bolt right on.

He has the same 15" wheels as I the Superlites and he assures me they will work.

I will double check when i get there anyway..

Gav,

[zr240]

Gav im not sure how much they are from were your getting them from but the toyota wrecker in Morrabbin on chesterville rd had them for pretty cheap I cannot remember but I think 120 each?

Ash

[Gav240z]

Zworx $99 each Waz is looking after me I think.

[Bambikiller240]

Wheels can be Ok, but without vented rotors, you MAY have a problem using S12W calipers is what I was trying to say.

[zed240au]

i have bought some of the vented calipers from a 4wd toyota wrecker in south australia $150 pair in really good nick freight was $30 to tas

I had my solid calipers painted in two pack paint to match my simmons wheels worked fine

Mick

[Gav240z]

I bought a set they look like there good the seals are in good condition etc...

But they are pretty heavy i wouldn't say too much more than original I'll compare better when i can get both in each hand.

I also got information on the Peugeot Discs I can run with them and apparently there pretty cheap so look forward to improved braking results.

They are the S12W aswell so I will post here when i get them working with the standard discs(rotors).

:classic:

[frank13]

The ealier S12 calipers are for the stock Z rotors, the S12w are a bit larger/wider to accomadate the thicker Z31 Vented rotors. With the Z31 upgrade you will not be able to use 14" rims. Depnding on the 14" rims you have you might be able to use after marcket 114's are a later style ZX 14" rim. Being that the later style ZX rims had I believe two different positve offsets, as the 240Z had zero offset. A 1" inch spacer seems like a lot to try to fit 14 over the S12, 3/8" 1/4" a little file here and ther might do the trick to keep 14's. :devious:

[Gav240z]

I've got 15" wheels so it won't be a problem....

Gav

[zr240]

Gav I was in the shed last night and I noticed I have a set of earlt gtr rotors that you could borrow to see if they line up corrctly with the toyota calipers it you like. they are vented and fit straight onto the z hub.

Ash

[Gav240z]

I was gonna try them on the solid discs but I wouldn't mind giving them a shot see if they fit at some stage and when i get the cash together even buy them.

Will talk to you soon about it.

[mperdue]

Just to clarify, the calipers used with stock rotors are marked "S12-8", not simply "S12". The others are "S12W".

Michael

[240ZMan]

I'm a little confused here. I have a '73 240 and I'm going to keep my stock solid discs. I've read 2 opinions about the S12W calipers. One seems to say that they are fine to use with the stock discs and 14" wheels. The other is that they are for the vented discs from an S31.

Since I might like to upgrade my discs to vented at some later time, can I go with the S12W calipers and use them now with my existing discs and 14" rims, and later upgrade to vented discs and 15" rims?

[240ZMan]

http://www.classiczcars.com/forums/showthread.php?s=&threadid=13509

I just read this post which sort of anwers my question. Still, if anyone knows for sure that the S12W WOULD work with the stock discs I'd be very interested to hear about your experience.

[Bambikiller240]

Originally posted by 240ZMan

.............Since I might like to upgrade my discs to vented at some later time, can I go with the S12W calipers and use them now with my existing discs and 14" rims, and later upgrade to vented discs and 15" rims?

I have not done this Mod, but my understanding is that you must use the S12W calioers with the (thicker) vented rotors. Otherwise the pistons would protrude out of the caliper in a dangerous condition.

Can anyone verify this? Will? Keiith? Panchovisa? Greyghost? mperdue? Anyone else?

[2ManyZs]

You can't use the S12W's with the stock rotor. The pistons would probably come right out of the bores.

Use the S12-8's with the stock rotors.

S12W's with the vented rotors.

The vented rotors can't be used with the 14 inch wheels because the vented rotors are larger in diameter than the stock solid rotors.

[hls30.com]

What 2ManyZs said! I am going to turn down my vented rotors so that I can keep my 14" slot-mags.

I am still getting ready for the brake conversion using the S12W rotors with the 300ZX disks, and the 280Z Turbo front disk/caliper conversion.

When I jump into it, I will shoot video, and post it, as well as all of the particulars I can find. The only parts I have not accumulated yet are the ss hoses. I know that thread is around here somewhere!

Will