Question about CPP C5 uprights for 1970-81 F-body

[WSSix]

No reason to apologize. That's what this place is all about.

[David Pozzi]

We tested the CPP spindles on Mary's car for a few events. The spindles were fine, the GMR hubs had some play and adjustment issues so we had to stop using them.

I would take the following into consideration and look at costs.

The stock spindle is OK, nothing really wrong with it, but to put larger brakes on it you have to cut the old caliper brackets off and bolt in an adapter bracket. The best stock spindles are the late second gen with larger outer wheel bearing. If you are using a floating caliper, the stock spindles work well and a taller upper ball joint can be used to help the poor camber gain. You need a hub to mount the rotor on since all second gen's came with disc only.

If you go to 13" or 14" rotors, along with non-floating calipers, then pad knock back is going to be an issue. How big an issue depends on a couple of other things:

If you have power brakes, the pedal moves half as much as manual brakes, this reduces pedal drop by half, so pad knock back is perhaps tolerable with power brakes, and terrible on a manual system. It also matters if the front and rear are non-floating calipers or just the front, and what size master cyl bore you are using.

The Corvette unit bearing hub fixes the knock back problem (in front). Using it on the CPP spindle allows everything to bolt up. The CPP spindle does not have a turn stop on it to limit turn angle, but neither do other aftermarket spindles.
You would have to use a tall ball joint to see any geometry improvement.

ATS makes a nice spindle that is forged Aluminum with 1" drop plus it's taller to fix camber gain. http://www.speedtechperformance.com/...rod/prd279.htm

If you are on a tight budget, then look at floating calipers using corvette rotors on a stock spindle, then add a tall upper ball joint.
The CPP is middle ground and needed if you go with manual brakes and/or 6 piston fixed calipers.
The ATS spindle is top of the heap so to speak.

[Blake Foster]

Originally Posted by David Pozzi

We tested the CPP spindles on Mary's car for a few events. The spindles were fine, the GMR hubs had some play and adjustment issues so we had to stop using them.

That is an interesting comment. I am sure JSM would have some CRAZY long winded explanation about this as he touted these as the ABSOLUTE best thing going. and has always slagged on the hubs used by GM and ATS.

[Vince@Meanstreets]

Originally Posted by David Pozzi

We tested the CPP spindles on Mary's car for a few events. The spindles were fine, the GMR hubs had some play and adjustment issues so we had to stop using them.

Originally Posted by Blake Foster

That is an interesting comment. I am sure JSM would have some CRAZY long winded explanation about this as he touted these as the ABSOLUTE best thing going. and has always slagged on the hubs used by GM and ATS.

[MillerBuilt]

Originally Posted by Blake Foster

That is an interesting comment. I am sure JSM would have some CRAZY long winded explanation about this as he touted these as the ABSOLUTE best thing going. and has always slagged on the hubs used by GM and ATS.

Hi Blake!

Here is a pic of Mr. Pozzi's experience pushing your AFX spindle/hub... If I recall David had approx.. 3/8" static clearance and upon hard cornering this was the result.....

[IMG][/IMG]

And then there was the ONE time/event that David/Mary ran the GMR hub that they took first place in Del Mar on the Auto-X. I don't recall any shavings

I would like to also ad (and hopefully David will verify), that he really spent no time working with myself to resolve the minimal "play" he was experiencing. (actually, if I searched hard enough I am sure I could find the email from him stating that....) Also, was about the time Art Morrison caught wind that David was trying out a NEW CPP Upright along with GMR Hub and decided to offer up a complete new front clip and was THE reason the CPP Upright and GMR Hub came off with no more testing...

So there you go Blake

[Rod P]

like watching a hockey game

[Vince@Meanstreets]

Originally Posted by Rod P

like watching a hockey game

heavy on the checking....dude are you wearing pants?

[Blake Foster]

NICE
And we know for SURE it wasn't the wheel that was flexing right? because that to my knowledge is the ONLY time we have seen this happen. My Nova had no more than 1/4 to 3/8 clearance with no issues, So I just want to cover all the bases.
I know I have seen wheels like this (maybe not this brand as I don't know which it is ) Break the center out of them on the auto cross/ road race so I would assume there would be some FLEXING in the wheel??

I am not going to get into it.

[Ernie W]

Hmm, I didn't think I would get this much response on the topic. I don't autocross or road race, I do plan on going to the drag strip some. Would I be better off with the CPP spindle or modify my stock ones and go with the Kore 3 setup? My main concern was possible failure of the cpp spindle as some say its a cheap cast. Right now I'm leaning towards the Kore 3 route.

Thanks for the input guys, good to see some well known names chiming in on this.

[fishface]

See what a can of crap you opened Ernie, ya big trouble maker?? Lol. Just kidding, funny how a simple question can turn into a pissing contest.