Building for the road course...again

[Easter Bunny]

Do these upgrades do enough?

https://www.speedfactoryracing.net/...nAu7yRTpFo-YJzzbp3Paissm5j4Wx9Bvoge9y7rCjEEpC

The pictures you posted a while ago didn't seem like making a heavy duty version would be that hard

 

[gotovato]

Would running less tire make them last longer?

The rear is already on a 225 vs the 255 front. The rear also technically has less grip.

 

[gotovato]

Do these upgrades do enough?

https://www.speedfactoryracing.net/...nAu7yRTpFo-YJzzbp3Paissm5j4Wx9Bvoge9y7rCjEEpC

The pictures you posted a while ago didn't seem like making a heavy duty version would be that hard

I called ktuned this week. They’re local to me actually. That hub was made for one batch. It sold out immediately and has now been discontinued. When I asked it seemed like the hub was no good. Guy said it’s on the back burner now

 

[phate]

@phate maybe hook up (or charge) goto with some not going to murder him hubs via your fancy new setup?

That's within reason to make, especially since an axle doesn't go through these (no broaching splines). If there's a small market for them, I'm in. @gotovato do you have a good one handy?

 

[Enki]

Doesn't sound like there's a small market at all, Phate.
But, if you make them good enough, maybe the market will dry up over time.

 

[Easter Bunny]

@phate don't you want a broken one too?

 

[gotovato]

That's within reason to make, especially since an axle doesn't go through these (no broaching splines). If there's a small market for them, I'm in. @gotovato do you have a good one handy?

There’s definitely a market for them. The ones Ktuned did sold out immediately but ultimately they had some problem as well.

I could order a cheap one off rockauto and ship it directly to you? It’s a weird design I’m not sure if that’s why no one has solutioned this yet.

Some pictures here

 

[jsmith]

Do they just weld the two pieces together and it’s the weld failing?

 

[Easter Bunny]

Can you post a picture of a busted one

 

[phate]

@phate don't you want a broken one too?

Yeah, I wanted to see a good one just to make sure it's manufacturable in my CNC - it is.

I can't tell from the broken hub pic of where exactly the break is occurring -



But it looks like that's just a cast steel piece that's been finish machined in a couple spots. I think making it 1-piece is totally reasonable; we just need to figure out the material.


@gotovato I'll shoot you a PM so we can work on the logistics of making this happen.

 

[gotovato]

Here’s a picture of a cracked one I caught. This is usually how I find them


They seem to just crack. I believe it is a one piece hub that’s a cheap casting then machined to finish. Those stupid holes don’t help anything either. The flange is 6mm thick from what I measured which probably also isn’t great

 

[phate]

What's your car pull for lateral G's, and what rear tire size are you running, and what's the weight and weight distro of the car right now? We need to math out the force the hub is seeing.

 

[gotovato]

What's your car pull for lateral G's, and what rear tire size are you running, and what's the weight and weight distro of the car right now? We need to math out the force the hub is seeing.

Average G’s around 1.2-1.45 peaking up to 1.6g

225/45/17 rear tire - 200tw for class rules
Car weights about 2700lbs
Weight distro I’d have to put it back on the scales but it’s front heavy and rear light lol
I’d guess 65% front 35% rear give or take?

 

[Easter Bunny]

Are those holes just to have access with a socket to mount it on the car? Could it be made solid and use a box end wrench for installation? Tedious but stronger.

Also I'm having a chuckle that msf/mso could have the ultimate fyhn moment and actually make parts to "fix your Honda noob"

 

[gotovato]

Those holes serve no purpose. Installation happens from the back side of the knuckle.
Making the hub solid with no hole would be no problem

 

[gotovato]

I feel like reproducing the same hub minus the holes and just a better material might be the answer here.

I have shipped a hub off to Phate and it should arrive Thursday/friday. Hopefully something can be done here!!

 

[Enki]

I feel like the geometry ain't helping much here either...Honestly it seems like if that hub were thicker (keeping the outer dimensions the same, basically thickening it up to the inside) you could probably keep the lightening holes and it would be fine. The stock ones do seem pretty wimpy, that's for sure.

 

[gotovato]

Ideally a thicker flange would probably solve this problem. Add 2-3mm to the back side of it to not affect the offset and good to go?

The holes I have no idea. Maybe done for lightness?

Most of us tracking this platform have a lot of rear spring rate and sway bar as well. Hitting curbs and three wheeling around probably doesn’t help anything either

 

[Easter Bunny]

While you are operating well outside of the design parameters of that part it's obvious that it was made to a bare minimum strength just by looking at it.

 

[Enki]

"Of course it's fine. What idiot would ever race a commuter car?"