dale3guy

My harmonic balancer is starting to wobble in my C6 and I want to change it before it gets worse and comes apart. Is an aftermarket balancer like the ATI Super Damper allowed? I would get the factory size version.

Edit-SCCA AutoX street/stock classes

froggy47

Not legal that I know of in a stock/street class. As has always been the case since I started SCCA the rules force you to replace a known to fail part with exactly the same known to fail part.

The bright side is you do get faster at it after a while.



Same with radiators, control arms, brakes, clutches, diffs, the list goes on.

Eventually you get sick of it and move to a street prepared or other class where you can fix some of it.

ltborg

Nope, just what froggy said, has to be stock.

Gordy M

Can you pin the crank with the stock balancer?

Black89Z51

It isn't the center part that is the problem, it's the outer ring that starts to separate from the center, get loose, and wobble. I had the same problem with the LS2 in my CTS-V. It was replaced under warranty, but started to wobble again before I sold the car.

ltborg

Technically no, but in my personal opinion it would be a bit of a weenie protest for someone to call you on it.

RDnomorecobra

replace it before it ruins the crank

dale3guy

Thanks guys. Hopefully the OEM one I put back on lasts longer than the 24k miles my original lasted.

Gordy M

While running some HPDE/time trials, my Balancer started moving forward..Heavy 3rd gear track...and blew the belt. I replaced the balance with another GM unit but pinned it. Fortunately when I autocross, I am old and half-fast.

froggy47

As previously posted I think, you could WELD the inner part of the balancer to the crank snout and still have an issue with separation of the two pieces of the balancer.

It's hard to bandaid a basically under engineered part. High rpms are what kills them.

ATI fixes the whole mess.

2 GTOs

Curious on similar points of view for valve springs, oil pump, timing chain for T2 class (or T1 limited prep). I assume a turn one pump with their pulley is not allowed either?

froggy47

OP was asking about scca autox.

2 GTOs

sorry, guess I was thread jacking with my questions and will start a new thread.

strano@stranoparts.com

A damper would be legal in STU... but then the car isn't (C5's only). But if anyone reading has a C5 and is thinking of STU a better damper like an ATI or Fluidampr (my preference) is ok.... even in an underdrive setup.

But no, not in stock.... er, um.... "street".