LocostUSA.com

No. I understand there is a language barrier for you. He is talking about both the ifs and the irs hub conversion on the same page. The probe parts are for the irs.

That's what I was saying, different rotor od and offsets, and nominal thickness that could make new pads too thick to install on a new rotor. Trial and error and expense is part of the process when stepping outside the typical build.

I suggest that you stay with the parts I described for the ifs.

Next step is to have complete spindles.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

There is a language barrier as well for sure, I'm Hungarian.
So I have misunderstood what it was said in that site.
I can't seem to find hubs, it seems like it is to old. Everybody only sells bearings. 1993-1995 are available though.
Not sure what is the difference between 86-91 vs 93-95.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

The hubs are not interchangeable. There are few buyers for new, 86-91 5 lug (turbo) hubs. Older rx7s have rebuildable hubs where only the part that wears is replaced. This means you must find used hubs. You may need to buy used, 5 lug spindle assemblies to get the hubs. 5 lug turbo hubs are less common. Trail, error, and expense:
https://www.ebay.com/itm/255997384081?h ... ondition=4
https://www.ebay.com/itm/325367659007?f ... R8rXr--DYg

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

Yes, only those I have found myself. They look very rusty, but I may not have a choice. Thanks

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

You know there is a link in my signature to cheap, common ford 5x114.3 ifs options.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

I will look into those as well.
I have been watching a Canadian on YouTube(Scott Rods), who uses RX7 components for his car, and he mentioned a guy, who sells RX7 parts in Canada.
I will have to get in touch with him, to see if he has these and for how much.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

I'm still confused about the front hubs used in that article.
To me, it looks like he used that Raybestos Probe hub, since I don't see splines in it, which would indicate rear hubs.
I'm looking at early RX7 hubs and those use two different sized bearings, one big for inner and the outer one is much smaller. The spindle shaft has a big diameter difference between the two.
Most likely I don't need that, since I need the two same sized bearing style hub, like the Raybestos one.
Am I wrong here?
By the way, I have got two NA complete spindles, and I have sandblasted them already.
Need to figure this RX7 hub out, and get some disc to be able to get the measurements.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

I see what you mean. For the front, he said he used 91 rx7 but it looks like he actually used 92-95 rx7 front hubs, which apparently are the same as ford probe 93-97 rear hubs (Raybestos pn 71-2119). He also says they are the same in the last sentence before starting to describe the rear mods:
"Stock Miata 4-bolt front hub on left, RX-7 front/Probe rear hub on right."

He says the adapter/spacer floats, but it must be a press fit to ensure it does not spin on the spindle. If it spins due to a failing bearing, the adapter/spacer can wear the spindle od.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

That sounds great, because this way I can buy new parts, and better selection of parts.
I will buy one hub and one disc, just to measure and be sure that they are OK.
Since I will try a Probe hub, I'm guessing that I could go with a Probe front vented disc as well, right?
Do we need front vented rotors, or just to be on the safe side(to be sure, that mates up with the hub correctly), should I get a solid rear rotor?

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

Since you have complete na spindles, fit new pads and measure the rotor clearance gap and offset from the hub face to determine the best rotor with the closest nominal thickness and offset ("hat" height). The caliper floats but you can determine the acceptable range of motion.

Solid, non-vented rotors will likely require spacers between the outer pad and caliper to keep the piston from over extending under worst case scenario of a minimum thickness rotor and worn out pads. Solid for such a light street car is acceptable but given the choice, I'd go with vented and standard temp replacement pads that work well cold.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

I only have the spindle dust shield and Miata hub.
I will pick up a caliper/bracket and and Probe hub then.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

I'm back.
Rockauto sent me a drum instead of a disk(probably for an earlier RX7), they sent me a left threaded 2407 ball joint, and the a refurbished front brake caliper(Raybestos), that has a striped thread at the big sliding bolt. Caliper and the bolt thread is messed up.
Rockauto is this bad?
I have found a rear disc from a 1993 RX7 that matches quite well for my needs, same disc width 1.772", bolt pattern of course and hole diameter. The only two dimensions that are different, are the thickness(where pads go) and the OD. Miata has an 18mm thick disc, and the RX7 is 20mm. The diameter that the Miata has is 264mm, and the RX7 is 294mm.
If it comes to that, that the disc's extra 2mm will interfere with the caliper/bracket, I will machine off a bit, 1-2mm.
I think that I can work with these numbers. I will have to make caliper brackets, that's all. I will have a big brake kit, no need to upgrade later.
I have followed that link to modify my spindles and they came out very good, but after making the calculations in vsusp, I believe that I should have not removed those .200. Instead I should have added some spacer instead.
In vsusp the scrub radius is -.369. I don't know, is a negative number is OK or not. Google shows MacPherson suspension only, where they say that it's OK.
Spindles for vsusp, are measured from the ball joint ball center, right? It is hard to "see" where the center is. How you guys are measuring that?
https://tinyurl.com/4e2vctje

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

Some error is to be expected in every step of the way. Best guess.

Rockauto has a process for dealing with bad sellers but you must be able to explain and take pictures without waiting too long. Fraud is everywhere.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12

What do you think, that -.37 is acceptable, or should I add a spacer behind the hub/or wheel spacer?
Also, I have looked again at the first picture in the thread that I have posted a few pages back, where people are posting spindle dimensions and the first picture is wrong about the 4-3/4" dimension. That number is only the casting height, the ball joint is not included.

_________________
Tibor


'20 Alfa Romeo Stelvio daily
Locost/442E in progress

Imho, 0.37" scrub is reasonable. Might want to work on the RC movement (yellow).

It can be a problem to rely on other peoples measurements.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12