• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Has anyone uprated the rear axles to CV joints?

Share this page

Re: CV Joint up-date

Lee,
if you are asking about hub centric I can provide the answer.
On a hub centric wheel the center hole is bored precisely in the center with an inside diameter that just clears the boss on the axle hub. When a hub centric wheel is installed, on the hub it is designed to match, the center of the wheel is concentric with the center of the hub. There is very little clearance or play between the boss and the bore on the wheel. In other words the hub and bore are responsible for centering the wheel.
The other type or wheel is lug centric. Which relies on the lugs and the bolt holes to center the wheel.
I don't know where wire wheels fall in their concentricity. With each spoke having the ability to distort the rim the designers probably would rather not discuss the subject.
I don't know how long hub centric wheels have been around. My impression is that it is relatively recent (10- 15 years?). My guess is that this is a less expensive and more accurate method of insuring the wheel and hub are concentric.
When we bought aftermarket wheels for my son's Civic, part of the mounting kit was a set of 4 aluminum rings that fit in the center bore of the wheels to decrease the inside diameter and provide a tight fit over the axle hub.
Our 2001 Miata also uses hub centric wheels. I think most modern cars use hub centric wheels.
I suspect that the wheels on a TR6 were lug centric. Without more information on the concept I don't know if a lug centric application can be modified to hub centric.
 
Re: CV Joint up-date

This (or something like it) is what we're talking about. It's from Moss Europe:

uktrs-166.jpg
 
Re: CV Joint up-date

Man, a few more upgrades like this and we'll all be drifting these cars with the nissan crowd soon. Keep up the good research guys, I'd be interested.
 
Re: CV Joint up-date

Ok I just spoke to the guy from the custom shop.

Edit - it's odd as I found it with a web search, and must have missed the post, but it's the same place that crj7driver posted above. I was quoted the same as him for the axles, but then there is custom work to make the hub carrier and outer hub.

He seems to think he's going to be able to make something CV jointed with a new custom outer hub that will fit through the swingarm and bolt in the stock place, splined not woodruff keyed (I'll consider upgrading the studs). I told him to spec for 300+hp as I'm looking for 270 crank out of mine with the mods. He doesn't think this will be a problem, and cost target is less than $1500 a pair (tbd of course - it may be less depending on final design and complexity). The idea is for a bolt in replacement.

I need to send him a complete assembly - from the driveshaft bolt plate back to the outer hub - but my car is in the shop (which is over an hour away) so it might take me a while to get to it.

If anyone has one of these setups off that they'd be willing to loan for a few weeks then I'm very interested, otherwise I'll try to get up there later this week and ship it out.

He has seen the Moss setup - he reckons it's a common european CV joint with a custom hub, he thinks there is stuff here readily available that will do the job just as well.

That's all I know right now. If anyone is interested still then I'll see about him doing a run rather than just two. I want to finalise the exact design first of course.

/ubbthreads/images/graemlins/cheers.gif
 
Re: CV Joint up-date

I think it's safe to say everyone who has responded to this topic is interested - especially if a batch run can lower the cost! Once developed you might even get someone like TRF or BPNW (or even someone like TSI or BF&E) to start carrying it - which would help drive the cost down further.
 
Re: CV Joint up-date

Well my idea was to get the guy to do all the work and then you get them from him when they are ready. I'm not really interested in it other than i) selfishly - I want a set for my own use, and ii) as an engineering exercise.

If it's custom work (which it will be) then it may end up cheaper for him to do a batch at a time. If that's the case then I naturally want to benefit from a discount - I don't want to make a profit from it, develop it or market it as it's not an original idea, and I already have a job. In addition it seems fair that the guy actually doing the work be the one who benefits here. I'm don't really have any burning desire to carry the R&D costs for everyone else either though.

My main reason for posting was to try to get a rough count to see who'd be interested in being early adopters - I could then give the guy an estimated quantity if he were to want to batch produce, so he could then base his pricing structure on that and hopefully discount accordingly.

Other than that I'm staying out of everyone elses business - ymyod. The guy's website is posted above (although he's out of the office the rest of this week, but on email). This is for public service only, and still dependant on final design and price...
/ubbthreads/images/graemlins/cheers.gif
 
Re: CV Joint up-date

fair enough - I was suggesting that he could (if interested) possibly market it - not that you would take it over. I just wish we had some of the nicer goodies that Europe seems to enjoy available here.
 
Re: CV Joint up-date

I think buying direct from the builder is what will keep the cost down, once the suppliers get it--the price is going to go up (middle man profit)
 
Back
Top