I'm in, just give me the word and I'll paypal you the funds. Looking forward to these!

we are at 12 currently, if we dont get 3 more by order time(and im sure we will), ill spot the last 3 sets. so im confirming pricing at 15 people($87 per set) is a go!

I'm still in.

sounds good, give me paypal info and I will make payment. going to bed am am crazy busy until monday, will make payment then

It's been a long twisting thread. What is the final product design? Is that $87 per side?

I am looking at doing the lowers in spherical and uppers in Delrin. With the talk of ICS using cheap sphericals what are the other options?

final design has a straight bore on each end (instead of tapered on the one end) to facilitate o-rings or grommets or whatever sealing implement you choose to use. i kept the shoulder as the difference in price between that or just having 2 snap ring grooves was negligible. having the shoulder is better in my opinion for holding the bearing race width tolerance as snap ring tolerance stack up would obviously double.

the materials are going to be 1018 steel for the sleeves and 7075 aluminum for the spacers. price is for 1 car, both sides. you get: 1 pair of sleeves, 1 pair of snap rings, 4 spacers and shipping in the US. you source your own bearings and sealing implements, and either weld or retaining compound them into the knuckle.


here is a rendering
https://www.miataturbo.net/attachmen...ine=1420945487





and as a reminder to everyone the bearing dimensions you need to adhere to can be found on this page:
2 of these were $84 to my door from motion industries
Item # AIB-10, AIB Series Spherical Bearings On Aurora Bearing Co.

and here are the cheap alternatives from qa1 at summit
http://www.summitracing.com/search/p...rder=Ascending


if you are talking about the rear outers (knuckle side), i think you have that backwards. the lowers dont require misalignment, they just need to pivot, so you would want the delrin in the lower position. the uppers need be able to misalign, so thats where youd want the spherical.


this is the only other option besides ISC that i know of at the moment. and please understand i have no experience with their products and can only assume at their price point that they arnt auroras or equivelent. so to say that as fact would be conjecture.

Are the QA1s really awful? My car is a dedicated autocross car that sees maybe 200 miles a year. Would the more expensive bearings be worth the expense?

I was thinking of the lower inners front and rear. I thought that's were the binding occurs due to alignment bolts.

Now I understand what you're offering. Thanks

Gotcha. And yea those do bind. The discussion regarding those was just thread derailment by bbundy, leafy and myself, I'm not offering anything for the lowers.

Do you mind replacing the QA1s 2-3 times a season vs the auoras lasting 1-2 seasons. Theres really no point to going through all the expense of putting sphericals in the car if you're just going to run ones that are so sloppy that you get more play in the joint than with the rubber bushing.

Well it sounds like the QA1s would start to add up quick if I had to replace them that often. I figured they would last longer than 2 events. I have seen the local dirt track guys run QA1 stuff, but I don't know how often they replace them.

*edit*

What degree of misalignment will you all be going with, if any?

They're so cheap why don't you just give them a try? The whole point of the sleeves is to be able to service the bearing. Worst case scenario you get a couple of events out of them for $30. I don't think theyll be as bad as leafy makes them out to be. They won't last as long as auroras, but I think you'll get more than 2 events out of them.

You should only need a few degrees. The auroras are good for 12 I think, although the ruca limits things to less than that.

Whatever the max toe in degrees you run is the most misalignment you should need.

isnt there going to be some unintentional caster added as well? i figure it could be a degree or 3 depending on how much toe in youre running.

Thats true. I'm too lazy to do the math, it cant be much.

here is evidence that there is significant longitudinal forces on the upper bushings.


https://www.miataturbo.net/attachmen...ine=1421020481

https://www.miataturbo.net/attachmen...ine=1421020481

https://www.miataturbo.net/attachmen...ine=1421020481

https://www.miataturbo.net/attachmen...ine=1421020481



some grommets i had in a harbor freight assortment worked well as seals. ill need a different solution when/if i upgrade to larger spacers as these were a very tight fit.

i had to cut one at a taper so it would seat in the sleeve
https://www.miataturbo.net/attachmen...ine=1421020481

grease
https://www.miataturbo.net/attachmen...ine=1421020481

https://www.miataturbo.net/attachmen...ine=1421020481

https://www.miataturbo.net/attachmen...ine=1421020481


https://www.miataturbo.net/attachmen...ine=1421020481


clamped and sitting on jack stands over night
https://www.miataturbo.net/attachmen...ine=1421020481

Very nice Sean! Job well done!

That bearing mount loctite is STRONG. I would trust it in this application.

thanks!

we are at 15 now, im going to pm the 3 people who havnt responded yet, so if we get to 18, ill spot the last 2 sets and we can get the 20 qty. pricing. woohoo!

Brake/acceleration torque presumably.

Great work Sean! This has all happened a lot quicker than I was expecting ... :)