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Old 01-29-2010, 01:46 PM   #51
Scooby921
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Originally Posted by slowguy View Post
Hate to bring this thread back from the dead but looking at where the cracks are on the back of the wheel, it looks very even throughout each spoke. Could these deep scratches/cracks have been caused by your calipers?? Reason for this inquiry is because I ran 17x9.5+38 (with a 5mm spacer, effective +33 front offset) on my STI and caliper clearance was MINIMAL at best (two, three sheets of paper clearance) and I have noticed some visible scratches from the caliper on it.

And any word from Enkei?
Thanks for bumping it. I've been forgetting to get back in here and update.

Marks are not from the brake calipers. There was plenty of clearance and I would have heard/felt any contact. I also looked over the other 3 wheels and they have the same marks in the spokes. Probably normal.



In any case the update is that Enkei called and requested that I send them the other three wheels. Not sure what they are going to do with them, but they are going to sell me a replacement set at cost. So its still an expensive "oops", but at least I'm not out $1100 to get a new set of RPF-1's.
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Old 01-29-2010, 02:04 PM   #52
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I had an Acusump blow it's top and Mecca cut me the same deal. At cost seams to be SOP. Still better than a sharp stick. Did they offer to show you photo micrographs of the fracture zone? They don't want those other wheels out there...
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Old 01-29-2010, 02:36 PM   #53
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.....

Last edited by trick3d; 01-29-2010 at 02:48 PM.
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Old 01-31-2010, 11:44 PM   #54
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Originally Posted by Scooby921 View Post
Thanks for bumping it. I've been forgetting to get back in here and update.

Marks are not from the brake calipers. There was plenty of clearance and I would have heard/felt any contact. I also looked over the other 3 wheels and they have the same marks in the spokes. Probably normal.



In any case the update is that Enkei called and requested that I send them the other three wheels. Not sure what they are going to do with them, but they are going to sell me a replacement set at cost. So its still an expensive "oops", but at least I'm not out $1100 to get a new set of RPF-1's.
Ah okay. Gotcha. Yah, at cost shouldn't be too bad and you're back on the road again with a new set
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Old 02-15-2010, 03:44 PM   #55
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New update...

Finally got everything figured out with Enkei. They checked the 3 other wheels I sent back and compared them to 12 other wheels they had in stock. Nothing looks cracked or out of the ordinary. They are returning those 3 wheels and sending and replacement for the broken one.


The cool/scary info...
They sent the broken wheel back to the main office/R&D/analysis group and they ran a bunch of tests. After taking measurements, running material analysis, and looking at the crack under microscopes they've determined the cause for the break. The outer portion of the wheel was twisted with respect to the hub mounting surface. The spokes were physically bent. Some extreme amount of cornering force caused a misalignment between the rim and the hub of the wheel and the spokes finally gave out.
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Old 02-15-2010, 04:29 PM   #56
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Quote:
Originally Posted by Scooby921 View Post
Some extreme amount of cornering force caused a misalignment between the rim and the hub of the wheel and the spokes finally gave out.
****... if i had heard that back, I'd probably feel pretty proud of myself

/me brags "I drove her so hard, the wheels gave out from under me!"
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Old 02-15-2010, 04:29 PM   #57
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Quote:
Originally Posted by Scooby921 View Post
New update...

Finally got everything figured out with Enkei. They checked the 3 other wheels I sent back and compared them to 12 other wheels they had in stock. Nothing looks cracked or out of the ordinary. They are returning those 3 wheels and sending and replacement for the broken one.


The cool/scary info...
They sent the broken wheel back to the main office/R&D/analysis group and they ran a bunch of tests. After taking measurements, running material analysis, and looking at the crack under microscopes they've determined the cause for the break. The outer portion of the wheel was twisted with respect to the hub mounting surface. The spokes were physically bent. Some extreme amount of cornering force caused a misalignment between the rim and the hub of the wheel and the spokes finally gave out.

s000000000000000.............the design isnt stout enough for the conditions encountered and associated hardware(tire) that was used....ie too little wheel for too much tire and vehicle weight?????
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Old 02-15-2010, 06:19 PM   #58
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You must be using some sticky tires and 3 wheelin' into a corner pretty good there. So now you have 2 sets of the same wheels?
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Old 02-15-2010, 10:52 PM   #59
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Quote:
Originally Posted by Uncle Scotty View Post
s000000000000000.............the design isnt stout enough for the conditions encountered and associated hardware(tire) that was used....ie too little wheel for too much tire and vehicle weight?????
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Originally Posted by ritky View Post
You must be using some sticky tires and 3 wheelin' into a corner pretty good there. So now you have 2 sets of the same wheels?
Wheels were used exclusively for auto-x for 3 years. 235/40r17 advan neovas and the car weighed in at 3200lbs with driver. Not the stickiest of wheels by any means. They're a hell of a street tire, but its no r-comp. And the wheels cracked within the first week I decided to start using them for DD use.


I can think of two possibilities...

1.) I bought the wheels used and its possible that the previous owner had beaten on them a bit and it simply took this long for the wheel to finally give out.

2.) There is one auto-x event I ran on an incredibly f'd up lot. There were two points on the course where the bumps were big enough to get the front end of the car airborne. Its possible I had the wheel turned going into one of those and caused the bend when the car landed.
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Old 02-16-2010, 08:24 AM   #60
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wheels are wear items....the fail just like all other man made mechanical objects

the fact that tires were changed quite recently makes me think that the issue was acclerated by that
Once again wheels are a wear items. This is why most race teams replace or service (inspect) at regular intervals.
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Old 02-16-2010, 12:35 PM   #61
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^^^Yup. I can't think of a better excuse to buy new wheels for my car.
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Old 02-18-2010, 11:36 PM   #62
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So much torque the wheel spokes twist off the line....
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Old 02-19-2010, 12:02 AM   #63
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s000000000000000.............the design isnt stout enough for the conditions encountered and associated hardware(tire) that was used....ie too little wheel for too much tire and vehicle weight?????
He must have been stretching tires. Surely that was the cause.

Seriously though. Must be pretty weak to just twist like that from normal driving. Surprising.

Seems like they took care of you though. Wouldn't really stray me away from them. I've owned a set of SBC RPF's before. Such beautiful wheels.
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Old 02-19-2010, 12:06 AM   #64
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He must have been stretching tires. Surely that was the cause.

Seriously though. Must be pretty weak to just twist like that from normal driving. Surprising.

Seems like they took care of you though. Wouldn't really stray me away from them. I've owned a set of SBC RPF's before. Such beautiful wheels.
Quote:
Wheels were used exclusively for auto-x for 3 years. 235/40r17 advan neovas and the car weighed in at 3200lbs with driver. Not the stickiest of wheels by any means. They're a hell of a street tire, but its no r-comp. And the wheels cracked within the first week I decided to start using them for DD use.
normal driving???

I think not
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