Hey guys.... I'm in a total panic right now... here's the deal

I ordered my Mcleod street twin off of ebay... it came complete in the box as stated... took it to my chevy guy down the street and he installed...

Now i have the most horrible vibration almost anywhere in the power band... but really really bad above 2000 rpm

Because the kit came all together, I assumed that the flywheel and everything were balanced... was I wrong in this assumption???? I hope this is the problem, becuase I'm pulling it out again w/ him tomorrow afternoon... and I'm pretty much clueless right now... please help.. I have to have my Z back on the road by this weekend!!!

Thanks as always guys!

 

ME TOO!!!!
GOT MINE IN TODAY SUPPOST TO BE NEUTRAL BALANCE FOR INTERNAL BALANCE MOTOR WHICH I HAVE
SHOOK LIKE A BASTARD
TALKED TO MY MACHINE SHOP THEY THINK IT IS THE FLYWHEEL
I TOOK IT OUT AND DROPPED IT OFF TO THEM THEY WILL LET ME KNOW TOMARROW
GETTING GOOD AT PULLING IT
DID IT IN 16 MINUTES START TO FINISH
ALSO NOTICED A NEW SOUND COMING FROM UNDER CAR MACHINE SHOP SAID IT COULD BE A MAIN BERRING GOT KNOCKED OUT
PRAY FOR ME AND MY CAR AND MCLEOD CAUSE IF IT DID I WILL MAKE A BAD PHONE CALL
ILL LET U KNOW
GOOD LUCK

 

also this might be a good time to bring up the fact that
racing sucks because everytime you move 1 step forward u take 2 steps back
god i love this sport

 

I'm not sure whether you both have the same problem or not, but the McLeod flywheel needs to be balanced the same way as your previous flywheel. If it's a stock balanced LT1, then that's not neutral, or if you've balanced your rotating assembly so that it's neutral w/o flywheel, then it needs to be neutral. If the flywheel is not balanced right, then yes, all hell will break loose...

Dave

 

found out today that the flywheel was out 23 grams = 700 lbs on my crank @ 5k wow that sucks
i think the flywheel was for a external balance
what do u think
aw the joy of aftermarket parts
well i am getting it taken care of hopefully have it back tomarrow
drained the oil out of motor to see if there was any metal it looked clean
i hope so cant afford another build right now
i let u know what develops

 

No matter what always get your flywheel balanced... even if it's pre balanced from the factory still have it checked... it's worth the extra 20 bucks or so to take it to a shop... better to find the issue while it's out the box... than on the car...

 

If you can pull a clutch out in 16 min i think you have set a new record, i don't know about that buddy

 

Just to be sure this is clear for everyone: a stock LT1 rotating assy. requires weight on the flywheel for balance, i.e. it is "externally balanced". If you have non-stock RA, you need to know if it is neutrally balanced or not. If it is, you should be able to bolt up any neutral balance flywheel. Having it checked isn't a bad idea, but it isn't absolutely necessary. If it's an external balance flywheel, it will have a very prominent weight attached on the periphery. Neutral balance will not.

Rich