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RAWS
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Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Thu, 11 August 2005 13:04 Go to next message
Hi all.

I really want to fit jza80 324mm rotors and brackets to my jza70. I know a lot of people are using jza80 rotors and Z32 calipers as it is more cost effective but I really have my heart set on the entire mk4 front brake setup.

I plan on doing a bit of track work and when I fit my HKS t3g's I'll have over 300KW@wlz and would like to be able to stop the thing....

Does anybody know of brackets or a kit to fit these brakes? I know the rotors require a collar and a hub ring to fit and i assume the calipers would need adaptor brackets. If there isnt a kit around (which wouldnt surprise me) is anyone willing to make such a kit for me? You will be paid of course. Or know of anyone capable of making such a kit?

Thanks
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 00:55 Go to previous messageGo to next message
If you can get me all the gear in Perth, I'll design them and get them made for you (and consequently anyone else after who wants them)
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MR 1JZ
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 05:09 Go to previous messageGo to next message
These are the holy grail of toyota brakes and I am dead set on getting a set for the soarer, so if youre gonna design and make an adaption kit cruz then id be happy to purchase one from you Smile
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 05:17 Go to previous messageGo to next message
Like I said above.

Get me all the gear I need to do it, and thou shall be done.

Obviously all gear will be returned.

Looking at this pic, all I'll need is the stuff at the bottom of the pic, plus a caliper (same side as hub) and a rotor (unmachined) and a new set of pads.

[Updated on: Fri, 12 August 2005 05:18]

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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 07:51 Go to previous messageGo to next message
Sounds good CrUZsida. So you want everything from bearing cap to axle hub? I assume you dont need the lower suspension arm or ball joint. That correct?

It just so happens I have a jza70 frontcut as I am (well my cousin is, who is a mechanic) currently stuffing the 1jz into my MA70. I'll ask him to remove all the parts you'll need.

Give me a week or three and ill buy a set of new rotors, pads and the calipers and send the whole lot over to you. Anybody know of a place to get a resonably priced set of jza80 calipers?? I'm in Adelaide but I dont mind buying from interstate.

Thanks
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 07:56 Go to previous messageGo to next message
I'm trying to get the A70 axle gear in Perth at the moment.
That should save you a fair bit in postage.

I'll hopefully know by the end of the weekend whether I can get them or not.

Then when you get the rotors/calipers/pads shoot me a PM.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 09:04 Go to previous messageGo to next message
I imagine that this conversion would be fairly similar to do like my ST205 caliper conversion.
The ST205 calipers are the same as the Supra ones except the casting for the inner part is different to suit the different mounting position (I know they're the same because I'm running JZA80 pads Wink )

In this case you might be lucky enough that you don't need adaptor brackets.

If you can find JZA80 front suspension, measure the following (easiest with the disc & caliper removed) & compare with your current setup:
1. distance between the 2 mounting bolts
2. distance from each of the mounting bolts to the centre of the wheel (or where it would be if still mounted)
3. (this one's a bit tricky to explain) the distance from the centre of the mounting tabs on the steering knuckle outwards to the centre of the brake rotor.

The last one is needed to know whether the caliper will line up with the disc.
ie one the ST205, the caliper is mounted to the back of the mounting tabs, whereas the original was mounted to the front.
On the Subaru I've upgradign to 4 spots, both types of caliper sit on the outside.

If all the measurements add up, then you may be lucky enough to only have to do the machining I had to do with no adaptor brackets (very engineer friendly)

Good luck with it! Cool
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 10:39 Go to previous messageGo to next message
ok CRUZ let me know how you go getting the hub assembly in Perth and ill let you know when I have the other gear.

Wagonist, ill ask my cousin if he has a set of vernier calipers to take these measurements and ill have a hunt around for some jza80 suspension.

Thanks
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DeViL rOlLa
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 12 August 2005 11:11 Go to previous messageGo to next message
i am so down for a set of these.
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Mon, 15 August 2005 08:04 Go to previous messageGo to next message
Ok, I've managed to get a stock brake setup in Perth.

I can get my hands on both a JZA70, and a GZ20 setup, so I can test both setups (make sure its all identical, which I am led to believe) (mounting points I mean)

So RAWS when you get the rotors/calipers/pads, shoot me a PM
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MR 1JZ
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Mon, 15 August 2005 08:15 Go to previous messageGo to next message
cruz they are identical in setup as the JZA70 brakes bolt on driectly to a GZ20 setup

danish did this brake conversion Smile
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Allan
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Mon, 15 August 2005 09:29 Go to previous messageGo to next message
better off useing the 350z road and track rotor as it fits over the A70 series hub without hub mods
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MR 1JZ
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Mon, 15 August 2005 14:11 Go to previous messageGo to next message
will the 4 spot calipers be usable with those rotors?
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Allan
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 16 August 2005 10:26 Go to previous messageGo to next message
MR 1JZ wrote on Tue, 16 August 2005 00:11

will the 4 spot calipers be usable with those rotors?


gimme the rotors and calipers and ill tell you!
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 16 August 2005 11:57 Go to previous messageGo to next message

ok cruz, hopefully about 2.5 weeks and ill have em. ill let u know when im ready to send a box ur way.


allan:im not gonna buy the rotors from the 350 only to find they dont work with the calipers when i know the jza80 rotors work with the calipers and fit with a simple spacer and ring (as long as cruz is happy to have the spacer and ring made as well as the brackets....) If someone else wants to try this out tho im more than happy to take advantage if it works... Smile
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kemicalx
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 16 August 2005 12:27 Go to previous messageGo to next message
if these are being made to fit a gz20 i'm presuming they'll bolt up to an mz20/21 yer? if so, what would the likely cost be for everything, calipers, brackets, disks, lines, etc

If they'll fit an mz21 I'm definatly interested.
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Allan
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 16 August 2005 12:58 Go to previous messageGo to next message
RAWS wrote on Tue, 16 August 2005 21:57


ok cruz, hopefully about 2.5 weeks and ill have em. ill let u know when im ready to send a box ur way.


allan:im not gonna buy the rotors from the 350 only to find they dont work with the calipers when i know the jza80 rotors work with the calipers and fit with a simple spacer and ring (as long as cruz is happy to have the spacer and ring made as well as the brackets....) If someone else wants to try this out tho im more than happy to take advantage if it works... Smile


well i look forward to seeing jza80 rotors slide over the a70 hubs without modifying them!
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 16 August 2005 13:54 Go to previous messageGo to next message
Allan wrote on Tue, 16 August 2005 20:58

RAWS wrote on Tue, 16 August 2005 21:57


ok cruz, hopefully about 2.5 weeks and ill have em. ill let u know when im ready to send a box ur way.


allan:im not gonna buy the rotors from the 350 only to find they dont work with the calipers when i know the jza80 rotors work with the calipers and fit with a simple spacer and ring (as long as cruz is happy to have the spacer and ring made as well as the brackets....) If someone else wants to try this out tho im more than happy to take advantage if it works... Smile


well i look forward to seeing jza80 rotors slide over the a70 hubs without modifying them!

Thats a decision for Mr RAWS to make.
I can get the hubs modded, or I can make the calipers fit other discs.
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Allan
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Wed, 17 August 2005 09:03 Go to previous messageGo to next message
[quote title=CrUZsida wrote on Tue, 16 August 2005 23:54Thats a decision for Mr RAWS to make.
I can get the hubs modded, or I can make the calipers fit other discs.[/quote]

if you have ABS you cant modify the hubs without losing the front wheel speed sensors.

the 350z road and track rotors are a bit thicker then the JZA80 ones, Maybe the jza80 calipers can be split and a spacer place installed
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BlackSupra
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Wed, 17 August 2005 09:05 Go to previous messageGo to next message
Pretty sure George, 'Snail' on these forums is the man to speak to.
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Wed, 17 August 2005 09:10 Go to previous messageGo to next message
Allan wrote on Wed, 17 August 2005 17:03

the 350z road and track rotors are a bit thicker then the JZA80 ones, Maybe the jza80 calipers can be split and a spacer place installed

They are the same width. 30mm

Alternatively R33 GTR discs can be used.
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Thu, 18 August 2005 08:06 Go to previous messageGo to next message
allan: buy issue No. 89 of zoom and they have the two simple items needed to fit jza80 rotors to a70 hubs. A spacer to correct the offset (which slips onto the hub over the wheel studs- obviously it has holes to allow the wheels studs to pass through...) and a hub ring which slides onto the lip of the hub as the jza80 rotors hole is slighly larger than the a70 hub collar.
I dont have ABS as it's an 89 MA70 converted to a JZA70.

Now, having said this. Cruz if you feel 350Z rotors will be a bolt on fit as allan says (allan im not disputing that they do fit but at the end of the day cruz has to make this stuff so ill leave the decision with him) and think they will work as easily as the jza80 rotors with the jza80 calipers I will buy them instead. If you are unsure I will just get the jza80 rotors as at least it has been done before and they are guarenteed to work.

I have rung quite a few importers and so far haven't found one set of jza80 4-spot calipers. Mad One guy said he's trying to get some but two other people are already waiting for some and he'd have to supply them first. He also said he charges $1200 for a pair of these calipers.

Does anybody know where I can buy a pair of these calipers??

kemicalx:as you can probably see with calipers around $1000 plus good rotors, pads, braided lines and cruz's custom brackets this isn't going to be an inexpensive brake upgrade. If you want a cheaper upgrade look at Z32 calipers on jza80 or perhaps as allan said 350Z rotors. Grab issue No. 89 of zoom where they have a complete guide to this conversion with pictures and places to buy the gear. They will be a significant brake upgrade on what you have. The reason I want the jza80 calipers is for circuit racing against the adelaide porsche club in a car with 300KW at wheels. I dont know what your budget is and I dont know what you want to do with your car but if jza80 calipers is the way you want to go, brace yourself for the cost... Shocked
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Thu, 18 August 2005 08:58 Go to previous messageGo to next message
RAWS
Have a look here at what the Japanese have been doing for 4 pot/big brake A70/Z20 conversions for years.
http://night-pager.com/toyota_sports/jza70/jza70.h tm
Most common is the Nissan 4 pot, followed by the Celsior 4 pot and lastly the JZA80 4 pot.
Of course popularity also coincides with the descending cost of each conversion.
Expect to pay ~$200 for the Nissan 4 pot, ~$500 for Celsior 4 pot and about ~1000 for the JZA80 4 pot pair of calipers.
I've got the Nissan 4 pot/JZA80 rotor setup on my JZA70 Soapra and the full JZA80 4 pot/rotor setup on my JZZ30 Soarer.
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kemicalx
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 00:32 Go to previous messageGo to next message
with jza80 4-pots alone costing $1000+ yer this mod will be out of my range Razz though i'll be keeping an eye on the thread as if other cheaper calipers can be adapted instead I might still be up for it, though it doesn't really matter at the moment anyway as i don't have the car they'd be going in, i've just been collecting mods for when it's done having it's r154 installed Very Happy
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 00:41 Go to previous messageGo to next message
I've got a pair of Z32 calipers lying around, so I'll make up some brakets for those who'd rather them.
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kemicalx
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 00:55 Go to previous messageGo to next message
yep first dibs Very Happy

What else will I need for the conversion?
And do you know how much compliancing would be?
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 01:02 Go to previous messageGo to next message
Compliancing is up to your engineer, that will vary engineer to engineer, let alone state to state.

As for the cost, I'd assume much less than $100 for the brackets, but it depends on what they end up looking like.
$200-$250 for calipers.
$50 for a rebuild kit if you chose to.
Up to $200 for pads ($200 for EBC Greenstuff, much less for others)
$100-$250 a disc, depending on if you go RDA or DBA, and whether you want 280mm, 296mm, 310mm or 324mm.

And some extra cost if the JZA80 discs require the hub to be machined like Allan says.
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kemicalx
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 01:27 Go to previous messageGo to next message
Sounds good to me Very Happy

what size disk would you reccomend? i'm not fussed about slots and cross drilling. Do you know how much surface the pads will cover?
Finally, what's it usually cost to get the hubs machined, i'm guessing ~$30 per disk?

Cheers mate,
Ashlin.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 01:38 Go to previous messageGo to next message
Considering stock MA70 size is 300mm, I'd probably go the 324mm ones.

Problem being that the 324mm discs are designed for the Brembo calipers (on Skylines/350z), so you'll get something that will look wierd like
http://night-pager.com/toyota_sports/jza70/DSCF0012.jpg

But, it will still pull up no worries.

And yeah, about $50 to machine hubs.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 01:47 Go to previous messageGo to next message
hmm, i have a feeling the mz20 has smaller disks than the ma70, though they share the same caliper. So to save on cost and still get and upgrade of sorts i'll probally go with the 300mm ma70 disk

edit - oh and one other thing will the standard brake booster be fine with the upgrade? Sorry about all the questions but you seem to know your stuff Wink

[Updated on: Fri, 19 August 2005 01:49]

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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 01:50 Go to previous messageGo to next message
Yeah, I'm only going by the DBA catalogue, so I don't know what the GA70, GZ20, MZ20 runs.

But if I get my hands on a 300mm JZA70?/MA70 disc, I can make an adaptor to fit the Z32 caliper too.
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 08:51 Go to previous messageGo to next message
cruz:you say get the hub machined, do you mean get the spacers machined for the hub as i've seen in the pics or do you have another way of doing this?

My cousin sent me a list of more importers so I've sent off another stack of emails in search of the elusive jza80 calipers. I'll let you know how I go with tracking some down. I'll be buying the rotors and pads as soon as I take delivery of the calipers. What sort of rotors are they in the pic above?? I like the look of em. At this stage Im gonna go with the dba 5000 series ones but I hear they are hurtfully expensive and im keeping my options open. Waiting on an email back from them to confirm this.

kemicalx:If you want to cover the postage I might just be able to send a set of jza70 rotors to cruz when I send my shitte over so he can make the brackets for your car also.

manny:As long as I can get the jza80 calipers I think im just gonna go with the full jza80 setup. I want optimum braking as Im hellbent on beating porsche's around mallala Evil or Very Mad
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 10:12 Go to previous messageGo to next message
That's the Sumitomo/Nissan Skyline/300ZX 4 pots in the pic with the blue rotor centre.

RAWS wrote on Fri, 19 August 2005 18:51

I want optimum braking as Im hellbent on beating porsche's around mallala Evil or Very Mad


For Mallala you've certainly got your work cut out for you. A group of the ALSC Soarer guys usually carve up Mallala with the Porsche guys and they find it tougher on brakes than even Phillip Island with it's considerably higher terminal speeds between braking points.
I believe your choice of pad compund will have a huge bearing on how effective any braking hardware is - the Soarer guys are using Ferodo DS2500 or even the hardcore DS3000 compounds around Mallala to be able to handle it. Some brake cooling ducting wouldn't go astray either.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 10:31 Go to previous messageGo to next message
RAWS wrote on Fri, 19 August 2005 16:51

cruz:you say get the hub machined, do you mean get the spacers machined for the hub as i've seen in the pics or do you have another way of doing this?

What sort of rotors are they in the pic above??

No idea what will have to be done to fit the JZA80 rotors.
I can't find out the internal diameter of them.

And no idea on the rotors, but they are a two piece setup of JZA80 rotors. Don't know the brand though.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 10:45 Go to previous messageGo to next message
Centre hole on jza80 rotors is 52mm
centre hole on ma70 rotors is 50mm

been thinking bout the same upgrade for me soarer with jza80 discs and r32 calipers. You need to make up a caliper bracket, wheel spacer to keep offsets same and centre hole ring 1mm round
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CrUZsida
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Fri, 19 August 2005 10:48 Go to previous messageGo to next message
Nah, not the centre centre.
The size of the bit that goes over the hub.

Nissan's are 144mm, JZZ30's are 143.75mm, not sure on the rest.
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 05:47 Go to previous messageGo to next message
any luck finding out the measurements you needed cruz?

I'm STILL trying to find a single wrecker/importer that has jza80 calipers...
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kemicalx
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 07:26 Go to previous messageGo to next message
Ey Raws, I'd greatly appreciate it if you could send over the rotors with your stuff, if you know how much postage will be pm me your bank details and i'll send you some dosh.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 09:20 Go to previous messageGo to next message
RAWS wrote on Sun, 21 August 2005 15:47

I'm STILL trying to find a single wrecker/importer that has jza80 calipers...


What's your budget?
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RAWS
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 11:37 Go to previous messageGo to next message
kemicalx:the rotors are off my frontcut which is for sale, if it doesnt sell before i send the stuff over you can have em. The may have been machined tho, not sure if this will make a difference.

manny:not really working to a budget bro. As long as the price isnt completely horrifying should be fine.
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Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 11:57 Go to previous messageGo to next message
would the diference between braking using the z32 caliper on a jza80 disk and a z32 on a a70 disk be great?

for ease of installation and cost the a70 disk wins hands down in comparsion to the jza80 however if the jza80 disks will increase braking ability markedly then they may be the better option.

Basically what i'm asking is, would upgrading the standard calipers on an a70 to 4 pots give much gain?
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November 2003
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 12:01 Go to previous messageGo to next message
4 pots take longer to heat up, and quicker to cool down.

Bigger diameter discs gives better braking.

Thicker discs take longer to heat up.
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RAWS
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Adelaide Street Racing ca...
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November 2004
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 12:04 Go to previous messageGo to next message
cruz, u find that info about making the jza80 rotors fit bro?

Might hae found some calipers. They come with slotted rotors and pads but they have been used. You said pads and rotors had to be new yea?
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Manny
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May 2002
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 12:18 Go to previous messageGo to next message
RAWS wrote on Sun, 21 August 2005 21:37

manny:not really working to a budget bro. As long as the price isnt completely horrifying should be fine.


I know of a set available at the moment in Canberra.
PM me if you need more info.
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CrUZsida
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Australia
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November 2003
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 12:32 Go to previous messageGo to next message
I need these measurements of both the A70 an JZA80 discs.

http://conceptual.net.au/~peewee/frank/disc.jpg

From the DBA catalogue

MA70
A. 60
B. ?
C. ? (B + C = 53.5)
D. 22
E. ?
F. 300


JZA80
A. 62
B. ?
C. ? (B + C = 50)
D. 30
E. ?
F. 323


Can someone verify these and fill in the blanks?
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kemicalx
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Geelong.Vic.Au
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August 2002
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Sun, 21 August 2005 14:46 Go to previous messageGo to next message
mmm honestly. If increasing the disk size is what improves braking perhaps I should scrap the idea of using a70 disks. Although bigger than z20s the gain probably won't be as dramatic as with jza80's

Solid ma70 disks cost $150ish each according to discpads.com

Any idea how much jza80's and required mods would cost in total?

Sorry CrUZsida can't help much with the measurements.
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CrUZsida
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I supported Toymods

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November 2003
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Mon, 22 August 2005 00:37 Go to previous messageGo to next message
kemicalx wrote on Sun, 21 August 2005 22:46

Any idea how much jza80's and required mods would cost in total?

Once I have all the relavant measurements, and I know what mods will need to be done, I can give an estimate on cost.
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RAWS
Regular


Location:
Adelaide Street Racing ca...
Registered:
November 2004
Re: Fitting jza80 4-pots to jza70. NEED BRACKETS, who makes em?? Tue, 30 August 2005 22:37 Go to previous message
DBA 1 piece slotted rotors for jza80 are $220
DBA 2-piece slotted rotors with alloy hat are $380

Both prices are DBA 5000 series rotors suitable for motorsport.

[Updated on: Tue, 30 August 2005 22:44]

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