ZR-1 Net Registry Forums - View Single Post

batchman · 07-06-2011

Good link there, by far the best price I've seen on the later hubs. Nosing around on that side it looks like they may have similarly advantageous pricing on the earlier hubs too.

I'm not sure how he's driving his car, but between the 2 C4s on A6s (the 91 ZR-1 and an 88 Z-51) we've been through hubs from all manufacturers and have not found any significant difference. That said autocross is probably the worst possible case since the car is always weight transferred and if you're driving hard they're loaded to the extreme. The basic problem is the grip of modern tires far outstretches the load capacity of this bearing design. There is an aftermarket solution that someone ginned up with tapered bearings but class rules (not to mention cost) prevent them on both cars.

We've been through enough hubs (up to 3 sets per season per car) that I have come to the conclusion that ALL the available hubs are coming from one factory in China and there is no substantive difference. I say this because I've had boxes of one brand with hubs from another, one that appeared correct but had a flange stamped with another brand's logo, that sort of stuff. They all bleed the same color though but the basic problem is they will all bleed.

The earlier car is Stock class so cannot change hub type at all, although the F-bod part should be okay (if it made a difference). The ZR-1 is classed to allow update/backdate so it can use the earlier style, allowing us to keep uniform spares.

I'd love to find a simple brake cooling duct setup as I think cooling the hubs could help.

Thanks/later,
- Jeff

PS I should add I'd also love to find a set of underdrive pulleys, Fidanza, lightweight pressure plate, Tru-Trac, 1,200lb front spring, light/simple radio, yeah the list goes on.

07-06-2011	#4
batchman Join Date: Jun 2009 Location: I live at Devens, one run at a time Posts: 454	Re: part seeks Good link there, by far the best price I've seen on the later hubs. Nosing around on that side it looks like they may have similarly advantageous pricing on the earlier hubs too. I'm not sure how he's driving his car, but between the 2 C4s on A6s (the 91 ZR-1 and an 88 Z-51) we've been through hubs from all manufacturers and have not found any significant difference. That said autocross is probably the worst possible case since the car is always weight transferred and if you're driving hard they're loaded to the extreme. The basic problem is the grip of modern tires far outstretches the load capacity of this bearing design. There is an aftermarket solution that someone ginned up with tapered bearings but class rules (not to mention cost) prevent them on both cars. We've been through enough hubs (up to 3 sets per season per car) that I have come to the conclusion that ALL the available hubs are coming from one factory in China and there is no substantive difference. I say this because I've had boxes of one brand with hubs from another, one that appeared correct but had a flange stamped with another brand's logo, that sort of stuff. They all bleed the same color though but the basic problem is they will all bleed. The earlier car is Stock class so cannot change hub type at all, although the F-bod part should be okay (if it made a difference). The ZR-1 is classed to allow update/backdate so it can use the earlier style, allowing us to keep uniform spares. I'd love to find a simple brake cooling duct setup as I think cooling the hubs could help. Thanks/later, - Jeff PS I should add I'd also love to find a set of underdrive pulleys, Fidanza, lightweight pressure plate, Tru-Trac, 1,200lb front spring, light/simple radio, yeah the list goes on.