Sway bar differences
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
I believe the diameter of the front stabilizer bar for both the Z51 and the Z06 is 31mm. The rear anti-sway bar on the Z51 is 25.6mm and the Z06 it is 27.9mm. The base C6 anti-sway bars are 25.5mm front and the rear is 17.5mm. Otherwise, I don't know of any differences between 2005 and 2006 stabilizer bars.
Burning Brakes
Joined: Oct 2005
Posts: 954
Likes: 1
From: Salt Lake City UT
St. Jude Donor '08
Autocross & Roadrace Forum Sponsor
Here are some diameters. Keep in mind that wall thickness and lever length also play a role in sway bar rate. The graph shows our current Pfadt offerings versus the GM bars. The Hotchkis bars fall roughly where the diameters would lead you.
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars. The chart is accurate.
-Aaron
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars. The chart is accurate.
-Aaron
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
Here are some diameters. Keep in mind that wall thickness and lever length also play a role in sway bar rate. The graph shows our current Pfadt offerings versus the GM bars. The Hotchkis bars fall roughly where the diameters would lead you.
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars.
-Aaron
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars.
-Aaron
Your bars are without a doubt the finest I have ever seen. I just wish I could stay married if I bought them.
Team Owner
Joined: Aug 2006
Posts: 57,804
Likes: 1
From: Portrichey FL
St. Jude Donor '13
I had Z06 swaybars installed last week on my base 06 a6. I have to say the back end wants to get away from ya if you nail the gas on a turn. Even stock the backend would come around, but the Z06 sways really make it worse. I plan on doing shocks and springs also.
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Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Thats why I always tell people to put more meat on the rear-end when upgrading the rear bar...it steps out really easily and can get away from you.
Team Owner
Joined: Aug 2006
Posts: 57,804
Likes: 1
From: Portrichey FL
St. Jude Donor '13
Was driving back to work from lunch and made a left turn at the light just as i came out of my turn, i kinda gave it too much gas the car downshifted and backend was all over the road.
Burning Brakes
Joined: Oct 2005
Posts: 954
Likes: 1
From: Salt Lake City UT
St. Jude Donor '08
Autocross & Roadrace Forum Sponsor
later,
Aaron
Race Director
Joined: Jan 2000
Posts: 12,375
Likes: 406
From: Florida
Aaron, you may want to indicate adjustment ranges on your bars, which are their big advantage (well...and they look awesome too!).
FWIW, relative to Z51 The Hotchkis bars add 20% up front and have three rear adjustments: 0, +15, +50. Overall, I don't think these bars would do much.
Their C5 product, which increased stiffness 50% all around, was great.
I also agree with Aaron that the C6 Z51 roll couple (F/R stiffness ratio) is about perfect for the street and roadcourse, but it wouldn't hurt to stiffen things up 50% overall. More rear stiffness is probably appropriate for Autox to get that rear end rotated.
FWIW, relative to Z51 The Hotchkis bars add 20% up front and have three rear adjustments: 0, +15, +50. Overall, I don't think these bars would do much.
Their C5 product, which increased stiffness 50% all around, was great.
I also agree with Aaron that the C6 Z51 roll couple (F/R stiffness ratio) is about perfect for the street and roadcourse, but it wouldn't hurt to stiffen things up 50% overall. More rear stiffness is probably appropriate for Autox to get that rear end rotated.
Racer
Joined: Jul 2005
Posts: 316
Likes: 0
From: Suisun
Here are some diameters. Keep in mind that wall thickness and lever length also play a role in sway bar rate. The graph shows our current Pfadt offerings versus the GM bars. The Hotchkis bars fall roughly where the diameters would lead you.
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars. The chart is accurate.
-Aaron
Wayne O is probably right about the C6 base diameters, the Base C6 ones listed in my chart are copied from the C5. I generally do not pay much attention to those bars. The chart is accurate.
-Aaron
Burning Brakes
Joined: Oct 2005
Posts: 954
Likes: 1
From: Salt Lake City UT
St. Jude Donor '08
Autocross & Roadrace Forum Sponsor
Aaron, you may want to indicate adjustment ranges on your bars, which are their big advantage (well...and they look awesome too!).
FWIW, relative to Z51 The Hotchkis bars add 20% up front and have three rear adjustments: 0, +15, +50. Overall, I don't think these bars would do much.
Their C5 product, which increased stiffness 50% all around, was great.
I also agree with Aaron that the C6 Z51 roll couple (F/R stiffness ratio) is about perfect for the street and roadcourse, but it wouldn't hurt to stiffen things up 50% overall. More rear stiffness is probably appropriate for Autox to get that rear end rotated.
FWIW, relative to Z51 The Hotchkis bars add 20% up front and have three rear adjustments: 0, +15, +50. Overall, I don't think these bars would do much.
Their C5 product, which increased stiffness 50% all around, was great.
I also agree with Aaron that the C6 Z51 roll couple (F/R stiffness ratio) is about perfect for the street and roadcourse, but it wouldn't hurt to stiffen things up 50% overall. More rear stiffness is probably appropriate for Autox to get that rear end rotated.
T1 bars are 38 mm front and 28 mm rear I believe. The important thing to note is the relative rate of the T1 front to rear. The C6Z varies from that ratio by a large amount. Not an advantage in my opinion.
TTRotary is right that 50% increase in stiffness over the C6 Z51 bars is a good thing. 100% is probably better. The adjust ability of the Pfadt bars allows you to balance the car out for your particular combo of tires, track and driving style.
-Aaron
Racer
Joined: Jul 1999
Posts: 311
Likes: 15
From: Southeast Florida
.
Unless you are going change to the larger Z06 rear tires
please seriously considered changing to the smaller Z51 rear bar.
Right now you may have made your car
way more dangerous.
.
I had Z06 swaybars installed last week on my base 06 a6. I have to say the back end wants to get away from ya if you nail the gas on a turn. Even stock the backend would come around, but the Z06 sways really make it worse. I plan on doing shocks and springs also.
I found out just the other day how easy it can get away from me.
Was driving back to work from lunch and made a left turn at the light just as i came out of my turn, i kinda gave it too much gas the car downshifted and backend was all over the road.
I found out just the other day how easy it can get away from me.
Was driving back to work from lunch and made a left turn at the light just as i came out of my turn, i kinda gave it too much gas the car downshifted and backend was all over the road.
please seriously considered changing to the smaller Z51 rear bar.
Right now you may have made your car
way more dangerous.
.
Last edited by FLY US; Oct 19, 2007 at 09:38 PM.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
The ONLY reason I have a Z06 rear bar waiting to go on my car in my garage is because I'll be getting 325 tires when mine run out.
