Interest: 5 bolt hubs

[Rocla]

You don't have to reengineer anything.

Yes you do, but only the hub. :)

5*120 pattern which is the goal, does not fit inside of the mounting flange of 4*100 e30 front hub. If it would, "everyone" would have redrilled hubs.

[AndrewBird]

I don't see why everybody's panty's are in such a bunch over machining a hub. It is a very simple part (not to say it isn't an important part). You don't have to reengineer anything. All you would have to do is duplicate the original hub and then drill it for 5-lug. Why is that so hard?

The ABS speed sensor ring is a separate piece, not part of the hub, correct? So the original could be pressed off and pressed onto the new hub.

Everything else is simple machining.

[einstein57]

How about an aluminum m20 block. That would be tits. I'd pay a grand for that.

[mintscorpion]

This is done on Nissan 240sx 5 lug swaps. I think it would be cool if it were just the hubs so the extra money could be spent on a BBK.

http://www.pdm-racing.com/products/5boltconversion.html

[xLibelle]

I'd pay no more than $250 for the set of hubs alone. And if they were available for that, I would almost 100% be in, BUT I would want an money back gurantee if I found that upon installation, that they did not fit my level of quality.

[Massive Lee]

[blunttech]

are you fucking for real you have plywood holding your brake calipers on? I'll admit i didnt read the whole thread so i dunno what was said before but how the hell can plywood handle the shear load of your calipers when your braking? that just seems a little hokey to me

its not regular plywood dude. its furniture grade and i have it sealed with marine poly. its has held up with no issues for over a year. i suppose youre another engineer who is going to tell me its not safe. hahahahah i will outbrake you at the last minute and swoop down to overtake you in the corner.

[Adrian_Visser]

are you fucking for real you have plywood holding your brake calipers on? I'll admit i didnt read the whole thread so i dunno what was said before but how the hell can plywood handle the shear load of your calipers when your braking? that just seems a little hokey to me

[chris4891]

i came in a little late, but i just wanted to give my take on machining new hubs. i dont know your background or experience, so im writing this as if you were an average joe (joe the plumber maybe?)

it wont be that difficult to design (draw) a new hub that makes all the parts fit together with the correct geometry. 2-3 hours (at most) in pro/e or solidworks, whatever youre using. thats the easy part.

but if you want to provide a product that is as sound and reliable as the oem item, you've got a bit of legwork to do. there are two routes, endless trial and error testing or the current tool of choice -> FEA. either way, you need to know or be able to approximate the forces present at that location. then some stress analysis. then its a bit of an iterative process.. selecting materials and processing (heat treatment, etc) that will give you a part thats strong enough.

the hub, as with many rotating parts, will see a fully reversed loading. its also a critical component. dont want any wheels falling off. so then you need to do a fatigue study.. how many cycles can it withstand, etc? after that you should be good to go, more or less.

dont get me wrong, this project is entirely doable, in fact i plan on doing these types of projects once i have enough $$ to get my own lathe and milling machine. i just want you to be aware of what you might be getting yourself into. as ive hinted, theres a lot of legwork thats done behind the scenes on parts like these. for reference, i work with a group that does structural analysis, and we charge $100/hr for services similar to what you will need to do in order to properly design this part.

here are a couple things you should figure out (and if you figure out #2/3 let me know ;)):
-approximate forces/moments on the hub
-oem hub material
-oem hub hardness (lets you approximate the heat treatment and resulting strength of oem part)

[Rigmaster]

+1

I think you guys meant to post this in the "lets legalize pot" thread going on now in OT.......



;)

[Mtriple]

mmmmmmm.... Moon pies

+1

[atomic]

Mmmmmmm.... Moon Pies

[blunttech]

Shut the fuck out!!!


Every E30 pantus de baggus worth his bong knows that pic is the big brake upgrade you did to that POS orange 2002 you and jonny bondo'ed up one weekend fueled by Mountain Dew and Moon Pies.

the point is i have the skill to pull this off. and the woodworking tools so you shut the fuck out

[Rigmaster]

i wouldnt mind going in on this as a joint venture. i can supply the rears. here is my car ive been running for over a year and several track days. spacers are 3/4" furniture grade plywood with 3 coats of marine varnish. holding up great so far. let me know if you want to handle the fronts and i could whip out the backs
fuck the haters. mods can be done economically if well thought out

Shut the fuck out!!!


Every E30 pantus de baggus worth his bong knows that pic is the big brake upgrade you did to that POS orange 2002 you and jonny bondo'ed up one weekend fueled by Mountain Dew and Moon Pies.

[blunttech]

i wouldnt mind going in on this as a joint venture. i can supply the rears. here is my car ive been running for over a year and several track days. spacers are 3/4" furniture grade plywood with 3 coats of marine varnish. holding up great so far. let me know if you want to handle the fronts and i could whip out the backs
fuck the haters. mods can be done economically if well thought out