WHAT THE??? New wheels
#1
Le Mans Master
Thread Starter
WHAT THE??? New wheels
Weird problem. Put 17 model z06 wheels and tires on my 05 Widebody. Had 06 z06 wheels and tires on it. 18/19's. These are 19/20's. No clearance issues except a very slight rub on left rear brake duct. Drove car once mounting and under light excelleration, rear end kind of hops/jumps unusually. Reacts almost like a rear wheel is loose. Back in garage, check torque on lugs...no problem. 100 ft lbs on each and the wheels are seated on the hubs properly. Spin the wheels with the car in the air and no wobble or warped wheel. Tires are Pilot Super Sport ZP's.
Drop it and drive it again, same thing. Any idea what the heck is going on? Going to put the old z06 rears back on today to see if it goes away but had no reaction like this before changing them out.
Open to suggestions to check
Drop it and drive it again, same thing. Any idea what the heck is going on? Going to put the old z06 rears back on today to see if it goes away but had no reaction like this before changing them out.
Open to suggestions to check
#2
I have heard the old adage that wheels can make or break the car.
I am less than happy with my current 2011 stock polished five spoke C6 wheels.
I'm just afraid of running into figment or performance issues like the ones described by the OP.
I am less than happy with my current 2011 stock polished five spoke C6 wheels.
I'm just afraid of running into figment or performance issues like the ones described by the OP.
#3
Le Mans Master
Where did you get the wheels and tires from? Are they off a new C7 Z06 or are the aftermarket?
#4
Le Mans Master
Thread Starter
#5
Melting Slicks
OP... have you changed shocks or rear leaf spring yet?
When I did my wide body conversion I put Z06 shocks front and back. AND swapped out rear leaf spring for a used Z06 unit.
Thats ALOT more rotating mass on your base set up...you have changed the spring rate by doing so.
I went thru all this your going thru now...
Choppy
When I did my wide body conversion I put Z06 shocks front and back. AND swapped out rear leaf spring for a used Z06 unit.
Thats ALOT more rotating mass on your base set up...you have changed the spring rate by doing so.
I went thru all this your going thru now...
Choppy
Last edited by choppychop; 11-11-2017 at 08:23 AM.
#6
Le Mans Master
Thread Starter
OP... have you changed shocks or rear leaf spring yet?
When I did my wide body conversion I put Z06 shocks front and back. AND swapped out rear leaf spring for a used Z06 unit.
Thats ALOT more rotating mass on your base set up...you have changed the spring rate by doing so.
I went thru all this your going thru now...
Choppy
When I did my wide body conversion I put Z06 shocks front and back. AND swapped out rear leaf spring for a used Z06 unit.
Thats ALOT more rotating mass on your base set up...you have changed the spring rate by doing so.
I went thru all this your going thru now...
Choppy
This issue was not happening before putting on this set of wheels and tires with stock 06 z06 wheels and tires. Only started with the new wheel/tire combo
#7
Le Mans Master
I have had the wheels checked my a wheel and tire company? They could be out of round or bent just enough that you cannot see it, but on the car under a load that is different. Just a thought. I don't think the mass is an issue seeing you were running the C6 Z06 wheels which are just little difference in size to the new ones.
#8
Melting Slicks
I have had the wheels checked my a wheel and tire company? They could be out of round or bent just enough that you cannot see it, but on the car under a load that is different. Just a thought. I don't think the mass is an issue seeing you were running the C6 Z06 wheels which are just little difference in size to the new ones.
#10
Le Mans Master
Thread Starter
They were just mounted and “road force” balanced by a GM dealer 2 days ago. I’m sure they would have noticed a warped wheel or bad tire while mounting and or balancing...no?
#12
Le Mans Master
Final a top tire and wheel shop and take them their. Explain you issues and let then check the wheels and tires.
#13
Le Mans Master
Thread Starter
Mounted the older 19" z06 wheels and tires back on the car last night. Drove it and seemed back to normal. (no hopping etc) Has to be something in one or both of the rear wheels or tires. damn confusing
Last edited by Jclgodale3; 11-12-2017 at 01:31 PM.
#16
Burning Brakes
Also, what size tires do you have on the new C7 wheels?
#18
Melting Slicks
tire fitment
my money's with choppy-chop. people also run into braking issues, when going to a larger tire size. I don't think that people realize how much added mass & weight is added, even going up one tire size
(not wheel size ). this is a case of "cause & effect". going back to the original set-up works, because that is what it was designed for.
how often have you experienced a wheel or tire ( in this case 2 each ) being that far off. not everything today is a plug & play.
could be wrong, but physics are a bitch!
good luck regardless!
#19
Melting Slicks
my money's with choppy-chop. people also run into braking issues, when going to a larger tire size. I don't think that people realize how much added mass & weight is added, even going up one tire size
(not wheel size ). this is a case of "cause & effect". going back to the original set-up works, because that is what it was designed for.
how often have you experienced a wheel or tire ( in this case 2 each ) being that far off. not everything today is a plug & play.
could be wrong, but physics are a bitch!
good luck regardless!
(not wheel size ). this is a case of "cause & effect". going back to the original set-up works, because that is what it was designed for.
how often have you experienced a wheel or tire ( in this case 2 each ) being that far off. not everything today is a plug & play.
could be wrong, but physics are a bitch!
good luck regardless!
#20
Le Mans Master
He is running 20's on all four corners, so the AH.TC sounds alike it could be a cause, but I would think he would get the message in the DIC.