A Man and his Vette

Thanks for the pics! Why are you worried about safety? Are you using the standard lugnuts/studs?[/QUOTE]


Fully torqued I have only 4 turns on the lugnuts on stock studs. I'll take them off until I can put on longer studs.

ahmed_busultan

do you think 1/2" spacers will clear z06 brake on c6 factory wheels

ahmed_busultan

Hi;
I've really got confused, if some one wanna help me out with this
I bought z06 brake and rotors and i wanna install them on my c6 2009 , but i still don't know
what spacers size i should go for and from were i can buy it with studs
1/4" spacers with 12" 1.5 studs ok if yes from where i can order them
please help me

marc8090

I do not have Z06 brakes on my car but from what I have read if you have the Gumby wheels, they will clear Z06 brakes with a 1/4" spacer. If you have the split spoke wheels, I don't know what spacer would be needed. The original 05-08 5 spoke wheels required a 1/2" spacer.

veloz

do a write up right here for us considering this mod...

ahmed_busultan

I do have gumby wheels but i don't know from where i can buy the 1/4" spacers

Biggie G

to do the lug swap ya gotta remove the hubs...

3 bolts
1 center axle bolt
brake caliper bracket

then you gotta pound out the old stud, then carefully replace it...if you dont install them nicely you will damage the hub...you might as well replace the hub since your in there



WHERE DO I GET ET LUGS?

Hib Halverson

DO NOT "pound out" or "pound in" wheel studs. You will damage the hub assembly and may damage the stud.

Wheel studs must be pressed in using a hydraulic press.

Wheel spacers more than 1/4 thick are dangerous because of the side loads they put on wheel studs.

If wheel spacers are used, the wheel studs MUST be long enough for the wheel nuts to thread completely on the stud. If the studs are too short, you MUST install longer studs to prevent the stud failing due to full torque load of nut tightening being applied to an insufficient number of wheel stud threads.

My advice to those trying to put Z06 brakes on a base car would be to forego the idea of using wheel spacers and get wheels with the proper backspace.

Steve_R

That makes zero sense since our wheels are lug centric.

Gotcha

Correct

The wheel studs are supposed to carry the load. There is clearance between the hub and the wheel by design.

The wheel stud shear capacity is about 15,000 lbs per wheel

HOXXOH

Stock wheels allow 8 full rotations of most stock and aftermarket lugnuts. Any time you can't get 8 full threaded turns, your safety is compromised. The less turns, the bigger the issue.

Al Gumby

Not trying to start a pissing match, but ever since I heard the term "lug centric" it bothered me because the idea goes against everything I know about how to make things concentric. I would prefer "hub centric" as the way to center a wheel. And nowhere did I see that someone actually measured their hubs and wheels. So I put in the effort, gathered some measuring equipment and pulled my Gumby's. The clearance I measured was .003" to .004". I would call that "hub centric".

Mind you, I'm NOT making a blanket statement saying Corvette wheels are "hub centric". I imagine it depends on the set of wheels and how they are machined. If the center hole is machined with too much clearance then presto, you have a "lug centric" wheel. It's that simple. I think I'm opening up the possibility that some are, some aren't.

I think "lug centric" is fine for my Toyota Land Cruiser, which it clearly is, but for a car that is capable of 190 mph I feel "hub centric" is the proper choice.

Steve_R

You better get rid of your Vette then, or never drive it fast. Regardless of what you measure or think, Vette wheels are lug centric. That's why the lug nuts are tapered; they center the wheel on the rotor. Hub centric wheels don't have tapered lug nuts, they have flat lug nuts. Spacers are usually hub centric; Vette wheels are not hub centric. There are lots of threads here that explain the difference, with pics.

Knob Jockey

Two very good sources for spacers/adapters and lug bolts are Doug Rippie Motorsports and Motorsport-tech.

Ahmer

So will there be a problem if you put a hub centric spacer and a lug centric wheel over it?

Boomer111

This is what I found out too.

Also I had vibration present with aftermarket rims with a 1mm larger bore than the hub. Wrapping some tape around the axle hub stopped the vibration...hard to believe but true and the tech had experience in the past with this fix. It has to be. close fit to begin with.

byte_me

Put a call into Motorsport tech- tell them you need 1/4" spacers (6mm) for a C6 along with extended thread (ET) lug nuts to get your 6mm in turns back. I just did a Z06 conversion on my 05 with Gumby rims and these spacers and lug nuts... No issues at all, and 1/4" is the minimum you can go to space the rim spokes out from the Z calipers (which are huge by the way)

Great guys at that shop- precision parts, fast shipping and great prices!

Ratchet Thunderbolt

Nice feedback!

Turbo6TA

Exactly .....

Tapered lug-centric Corvette wheel nut: