Mathew,

IF you are able to introduce a product that rivals the price of the BRZ gearset already offered what would be the total cost to have a gearset installed into a typical 6-Speed gearbox? Roughly $4500?

I am more interested in seeing 3.3 gears just readily available then I am on a group buy. I don't want to order a set now, but sometime in the future I may.

If this happens they are going on the shelf. Why not save a few bucks and prove there is long term interest?

There would be even more interest in 3.3 once there is a trans solution also.

I'm interested.

Screw all you guys, I want 3.3 gears for highway cruising. Far less interested in them for track use.

This^^

oh and 60 MPH+ in second

I truck around in 6th at <2000 RPM with my daily all the time

In for 3.3 group buy!

https://www.miataturbo.net/race-prep...4/#post1111222

https://www.miataturbo.net/suspensio...2/#post1395080

The first thread ("Gearbox options/experience") is an absolute must-read for you, MFactory, and anyone else at Jack's working on this project. It's the best and most recent synposis of our current options, the issues with those options, the various requirements for each specific application (street vs. autocross vs. road race), and lots more. I can't easily impart all of the information unto you more quickly or easily than to tell you that you absolutely must read that thread front to back.

If you are going to do only a 3-4-5 you are basically locked into OE ratios. Any tweaks will leave an odd gap between 2nd and 3rd that would not be desirable for a substantial number of customers (street cars). If you can do all 6 or at least 1-5, find posts by me or Emilio on gear ratios. 2.8/2.0/1.5/1.25/1/.85 puts you in the ballpark but we have both gone in depth on why

In for 3.3 group buy also

I'm interested in the 3.3 group buy as well.

Moi aussi. I'm picking up a modified MS for track use and the 3.3 should work nicely for that application. Many thanks.

Do you guys really hate shifting that much that you need the 3.3? You should put in an auto in whilst you are at it! :skid:

Yes.
And I did. (in my other car lol)
And I love it.

Semi-truck stump pulling gears are probably fun on track. Not so much in every day traffic

I think it's fair to say a 3.3 R&P group buy would have decent interest enough to justify a group buy

What's his face (Bill?) from MiataRoadster seemed to have what, like 50 people interested before he aborted his quest for getting these to market?
So yeah, I'd say there is interest. But I want someone to actually install/test one of these and tell us all about it first.

I received order confirmation this morning from Michael. Unfortunately, the earliest I see my car getting back on the road is mid-July.

Yep, I already ordered one too but am in the same boat as Ted75. My car is up on stands till probably July or so also.

Got mine today. 43/13, or 3.30769:1. Unicorn gears forever, now they come in 2 days air-freight from Taiwan. Super cool.

For big, take the image URL and delete the "l" right before the file suffix.

These will replace the 3.63s in Acamas.

Attachment 230426

Attachment 230427

Attachment 230428

Which car is Acamas? Is it the street car? I want a review of how they compare to the 3.63 gears and a 6speed on the interstate. What rpms is cruising for 65/70/75/80mph?

I also wonder if these came from one of the factories that MiataRoadster tried to get to make them. I believe Bill said he tried a few shops in Taiwan, but none could get the QC that he wanted.

I don't need google. I have Savington!

Just PM him!

I am lazy, ergo: 3.6 vs 3.3, 0.3 difference, or about 10%. Take 10% off your current cruising RPM. I run ~3600rpm at 80, so 10% less is ~3250.

Actual math, loading it into my gearing spreadsheet: 23" tire, 6sp, 3.63s are 3584rpm@80mph, 3.308s are 3260rpm.

I like my way better.

https://en.wikipedia.org/wiki/Acamas_(son_of_Theseus)

https://www.flyinmiata.com/tech/gearing.php

enjoy

On 225/45R15 and 6 speed
65: 2646rpm
70: 2849rpm
75: 3053rpm
80: 3256rpm

Interested to see what these sound like and what the hold up to. The hobbing looks kind of sloppy on the ring gear, the grind on the pinion looks great besides the apprentice marks on the faces of a couple of them.

Between 3.3 gear set and the transmission talk, I wonder how FM's interest (if there is any) would sway things i.e. economies of scale.

The FM2R setup could really benefit from lower ratios and a stronger gearset. I'm sure the folks that have FM do all the work would be stoked to get a transmission they never have to worry about breaking and a differential that allows them to tootle along on the highway at more reasonable RPMs.

(FM slash Moss slash TSE slash 949. FM came to mind first because that's where folks seem to go for the turnkeys)

Not that it matters too much but I seem to be the one that "discovered" the 3.3 buried on MFactory's site. Told Andrew a few hours later then he ordered one, as we did. We have been talking with MFactory for almost a month about various projects. I'll share more as we get a program going.

Seriously though. A gear ratio that peeps have wanted forever and it is just sitting there in obscurity on their website buried in Honda.

Yup. That was my reaction and why I contacted Andrew. When I saw that he posted here I realized I didn't need to publish anything as the Miataverse was now aware of it.

If you are wondering about the gearset price plus installation, I can't really accurately comment on that as the pricing is a ways out on the gearset.

The gearsets we have installed in BRZs cost around $6k for a 1-6, and typical installation fees are outlined below.

I would imagine the cost to install Miata gears would roughly mirror what we charge for the BRZ/86 AZ6, but take this with a grain of salt until we work out something firm. For that specific AZ6 we charge a flat fee of $1000 to install it, and the balance of the trans parts are inspected for excessive wear. We typically try to steer people into our basic rebuild package for that trans ($1150), since it already includes many of the consumables (1-5 synchros, 3-4 fork and sleeve), and with a new set of synchros we can detail them for better engagement from the start. Mazda is a lot more expensive on parts (esp synchros) than Toyota/Subaru, and they are unfortunately not interchangeable, so I'd have to look into what a basic build package might cost...off the cuff I'd say it would expect it to be $250ish higher.

Hope that helps!

Have read in the past, will revisit in the immediate future. Thanks for the reminder that this has been covered already.

For what it's worth, whilst there are several factories in Taiwan that have the capability and machines to make hypoid gears, there is only one manufacturer in Taiwan that specialises in the performance aftermarket (for gearing products) and is willing to produce them in small-batch quantities; us (Who are INFINITUDE? - YCW Engineering Ltd Forums). All the other factories are setup for mass-quantity/oem (i.e 500 moq)

I believe that the individual you are talking about (actually, I am almost 100% certain) was the one responsible for us having these 3.3 final drives in the first place. Note that this reply is from our "companies" perspective, NOT our "brand" (i.e MFactory):

1) Said individual contacted both MFactory and one of MFactory's US competitors at the same time
2) As we do not succumb to low-balling, said individual decided to order through the US competitor instead (read the forum link that I posted up above for background info on our "company", not our "brand")
3) The US competitor put the order through for 30 sets (which is our moq), and with all custom orders, we always ship out a prototype first to be tested
4) Said individual installed the prototype, but was not happy with the excessive "noise"
5) Because of this, we decided to have our own US facility (MFactory R&D) install one in an S2000 to see if we got the same results; we did not. What this suggests is that said individual did not shim/setup/install the ring & pinion properly
6) Being a "specialist", said individual refused to acknowledge fault, so cancelled the order with the US competitor (this is based on what the US competitor told us; we did not deal directly with said individual)
7) The US competitor basically being just a trading company, did not have the funds to "take the hit", so decided to also cancel their order with us, thus leaving us with around 15 sets (+/- a couple) of the initial prototype batch (hence the slight lack of "finished look" as mentioned by someone in the comments in this thread)
8) As anyone doing business acknowledges (on the "frontend" anyway), the customer is always right, so we just decided to let it be and not make a fuss out of it, and decided to just add the sets we had left to our online catalog and let them sell by themselves (hence no promotion/marketing)

So unless there is significant interest in proceeding with this "discontinued" project and pushing into the production stage, once the initial batch is sold, there won't be anymore available. FYI, we only have 9 sets left in our inventory.

Define "significant interest" please.

At least 30 sets, as hypoid gears cost significantly more to manufacture than our regular FWD ring & pinions.

​​​​​​​Thanks for all the information. You also only have 8 sets left in your inventory now. Just ordered a set for myself.

Wow, I will be buying mine this week if they aren't sold out by then. I really hope this project is continued into the production stage, at-least until i can get mine.

30 sets seems like not much though. Especially if it could be paired with a transmission solution.

But I'm not in the aftermarket miata part business (but do like spending other people's money).

Just a heads up so you are aware of this in advance: As our gears do not have as much of a helix angle as the oem, there will be slightly more noise (whine) over the oem final drive. After installation, please don't expect these to be "silent" like the oem final drive.

As with all RWD Diff builds:

1) You must shim the diff to within oem specs (always check and write down the oem spec on your specific diff before disassembling)
2) We always recommend using new diff and pinion bearings
3) You MUST replace the oem crush sleeve (if there is an aftermarket solid sleeve available, purchase one and use it, as the oem crush sleeve is relatively weak)
4) Use a good quality synthetic diff oil, such as Torco SGO (there are others though)

You are talking about cheap ass miata people. 30 sets up front is a ton, and I think a hard goal to get to. Long term if they have a trans solution also I can see them selling more then that, but it won't be quick and holding inventory sucks.

Tell me about it! lol. Part and parcel of doing business though :(

​​​​​​​ Only 7 left.

30 sets isn't much. How many sets of wheels does a retailer buy from a supplier? Cast exhaust manifolds? $20k in inventory isn't much. How many EFR's is that? Coilover sets? Carbon bicycles?

What's the better choice: 3.3 diff + installation, 'cheap' T5 and install kit which doesn't exist, usable first for street kids
-or-
6 speed, new innards + installation?

I may be oversimplifying this.

This is why I was wondering if the 'bigger' miata companies were interested in jumping onboard. If they were, then you could increase the minimum order, get a better price, and spread the capital required for the sets over a few folks so one person wouldn't be sitting on all the inventory and all the 'risk' to get the order through.

As stated above, that's what they tried last time. It didn't work.

WOWW I had a feeling this was somehow related, didn't know how close to the jackpot I was. Thanks for sharing.

The remaining units are gonna fly off the shelf lol

Ah bummer, welp... I hope this can be something that can be a group buy once these run out....today.

lol, sounds like my dreams were pretty on point ...

so glad I pulled the trigger on this one!

Have you purchased yours?

Fuck it. Just bought mine. $625 shipped. I am not going to risk missing out on this when used 3.6 are in the 400s. Unless this was a genius sales tactic and they have like 100 on order.

OEM Part numbers:

http://www.teammfactory.com/images/other/mx5.jpg

There is an aftermarket solid sleeve available.

Weir Performance - Solid Pinion Spacer Kits

$55

Was just about to post that up, but you beat me to it :p

Now we just need an mfactory LSD from you guys too.

Upgrade to the MSP axles, and you can run the S2000 fitment :)

Nobody makes aftermarket MSM axles afaik. And the stockers are not easy to find.

Problem easily solved, but as I'm not a vendor, I need to refrain from posting up sales-related replies :)

Ha, I was going to put mine into a Torsen so I didn't have to pay to have my OSG rebuilt again. Now that I know the gears are essentially irreplaceable, I may build into the OSG so that I don't accidentally break the torsen and trash this R&P :)

Wow! I'm glad I looked here when I did. These do exactly what I have been wanting: 5spd shift speeds from my 6spd with an extra gear up top for cruising. I mean, just look at the spreadsheet :o

Looking for a card with some balance free, I really wanted cams but this is too sweet to pass up :party:

Edit; Sav, that's a good point. I need to consider a more stout differential now...

become vendor
make stuff
Profit!