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The Dark Side of Will wrote: ↑Wed Feb 26, 2020 8:54 am The 1988 Fiero lower ball joint taper appears to be 2 inches per foot (~4.75 degrees half-angle), which is kind of weird. Now to find a 2in/ft tapered reamer to fix the lower ball joint taper in my right knuckle...
DarkHorizon asked the same question on Old Europe... I could do that but I'd need to make the upper ball joint boss a bit elaborate. Fieros have very short knuckles in terms of the distance between the ball joints. There's only so much space for even the stock bearing and there's that much less space for a significantly larger bearing.
C5/6/7(/8?) Corvette front.
You could probably order another set of these from Coleman:Jalisurr wrote: ↑Mon Jun 07, 2021 1:39 pm New member, curious, did anything ever come of either of these ideas? Either the custom uprights or the coleman spindle conversion? I'm working on an 88 Fiero track car build and it seems like the wheel bearings are the main thing holding it back, everything else is more or less solved. I'd love to be able to bolt on the SKF C6 Racing bearings and not need to worry about it.
The separation between the two bearings is actually the big factor. Rodney's bearings are on the right rack with extending the back side of the cartridge toward the spring in order to increase the separation between the inner and outer bearings. (I wonder where he got that idea!Jalisurr wrote: ↑Tue Jun 08, 2021 12:54 pm Update: I've contacted Coleman Racing and they are indeed still able to make the spindle conversion kits for 88 Fieros in 5x100. It's around $500/corner.
I've also been looking at Rodney's new design, rebuildable hubs. I think this is a new revision since the initial tapered roller hubs that I've seen mentioned here, these ones have replaceable bearings and I believe a stronger flange. He does specifically say 'Not for racing' but I gather that may be more of a result of drama on the other forum.
Comparing the two, the bearings look to be almost identical. Is there something about the design of the spindle style bearings that would make them inherently stronger than the hub design?
Here's the comparative dimensions of the bearings:
Thoughts?
)Interesting. I may need to order both parts to compare out of curiousity's sake. I wouldn't have thought that the spindle style would be able to have significantly more separation between the two bearings if they are maintaining the stock fiero offsetThe Dark Side of Will wrote: ↑Tue Jun 08, 2021 8:11 pm The separation between the two bearings is actually the big factor. Rodney's bearings are on the right rack with extending the back side of the cartridge toward the spring in order to increase the separation between the inner and outer bearings. (I wonder where he got that idea!
Rodney's a great bracket maker, but he's struggled with more advanced assemblies. Bearing design isn't easy, and he's had some fits and starts. I think Steven had an early set of Rodney's stock depth tapered roller cartridges, and the dust cap popped off on its own after a track day.
I had to bore out the center of my motegi's as well....exactly as you are doing...Jalisurr wrote: ↑Mon Feb 07, 2022 2:13 pm Just a quick update from me - I did order a set of the Coleman racing spindle adapters for my 88. Picked them up this weekend.
They look very sturdy. As draven mentioned, the hub section does extend quite a ways through the wheel, and require a 70mm center bore on the wheel and brake rotor (standard Corvette size). My Enkei RPF1s have a 73mm center bore at the back, but have a section on the front where the center cap would normally go that drops down to 64mm, so they don't fit on the hub stock. I'll be boring that out to 70mm to clear.
Unfortunately I'm told I got the last set that Coleman had and they aren't producing more, so if it works out well for my build...sorry? I'll update again regardless once I've got them on the car and get a chance to see how they hold up on track.
Yeah, I'm pretty sure I have them in the stash someplace.draven wrote: ↑Mon Feb 07, 2022 3:42 pmI had to bore out the center of my motegi's as well....exactly as you are doing...Jalisurr wrote: ↑Mon Feb 07, 2022 2:13 pm Just a quick update from me - I did order a set of the Coleman racing spindle adapters for my 88. Picked them up this weekend.
They look very sturdy. As draven mentioned, the hub section does extend quite a ways through the wheel, and require a 70mm center bore on the wheel and brake rotor (standard Corvette size). My Enkei RPF1s have a 73mm center bore at the back, but have a section on the front where the center cap would normally go that drops down to 64mm, so they don't fit on the hub stock. I'll be boring that out to 70mm to clear.
Unfortunately I'm told I got the last set that Coleman had and they aren't producing more, so if it works out well for my build...sorry? I'll update again regardless once I've got them on the car and get a chance to see how they hold up on track.
Funny, didn't realize they were keeping any in stock... I do have the cad drawings so I think they could be reproduced... Will I think I sent you a copy as well, did I not?
