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Old 08-17-2011, 11:26 PM   #251
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Bump for iisme13 and his G8.
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Old 08-18-2011, 02:57 AM   #252
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Ok, I orders the cts-v calipers but am having a hard time getting some front rotors. Can you guys help me find some that don't cost an arm and a leg. I have tried to look for Dba or other companies that offer drilled but only brembo so far. They are very expensive at $1300 for the front pair. I tried r1 and grantelli but either have anything. Please help
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Old 08-18-2011, 09:16 AM   #253
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Originally Posted by Venom_SS View Post
Ok, I orders the cts-v calipers but am having a hard time getting some front rotors. Can you guys help me find some that don't cost an arm and a leg. I have tried to look for Dba or other companies that offer drilled but only brembo so far. They are very expensive at $1300 for the front pair. I tried r1 and grantelli but either have anything. Please help
Availability has been an issue for CTS-V rotors. Have you checked on availability for the GMPP Brembo two piece rotor for the CTS-V?
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Old 08-18-2011, 11:21 AM   #254
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The brembo 2 pc was $1300 for the pair. I was looking for something a little more reasonable
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Old 08-18-2011, 09:29 PM   #255
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Originally Posted by Venom_SS View Post
Ok, I orders the cts-v calipers but am having a hard time getting some front rotors. Can you guys help me find some that don't cost an arm and a leg. I have tried to look for Dba or other companies that offer drilled but only brembo so far. They are very expensive at $1300 for the front pair. I tried r1 and grantelli but either have anything. Please help
Can I ask what you paid for the the calipers?
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Old 08-18-2011, 10:38 PM   #256
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Give one of these two Chevy / Pedders Dealers a call for help with the CTS-V bits.

Becky Dolye
Rogers Chevrolet
chevyfleet@aol.com
(734) 479-7171

Rich Wilhoff
Abel Chevrolet Pontiac Buick
r.willhoff@yahoo.com
(888) 599-4944
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Old 08-18-2011, 11:40 PM   #257
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They list to call them but when you do they will just take your number. After a day they call you and say the rotors are unavailable at the moment
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Old 08-19-2011, 09:35 AM   #258
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mike@thepowdercoater.com originally posted this in a self standing thread. I thought it was worth reporting it here. Thanks for a great tip Mike.

Quote:
Originally Posted by mike@thepowdercoater.com View Post
I know its a popular upgrade, but be advised that when swapping the rears out for cadillac rears, the balance tubes should be moved to the opposite side of the cadillac caliper before installation.

On the camaro caliper, the crossover tube is on the side with the smaller piston. Because the caliper sits on the leading edge of the rotor on the cadillac, rather than the trailing edge like the camaro, the crossover tube is on the side with the larger piston.

The reason for the difference is pad wear and taper. The leading edge wears faster and generates more heat, so to compensate for it, perfomance caliper manufacturers put smaller pistons on the leading edge.

Fronts are oriented the same on both cars, so if doing a front only upgrade there is no issue.

Just some friendly advice from your local powdercoater.
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That is a great tip. We did flip them on our install, but I do not think we made it as clear as you did.

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Old 08-25-2011, 02:50 PM   #259
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Availability of the OE CTS-V rotors has been problematic. I am checking with the source to see if there is anything we can do to alleviate this. I should have a response back shortly.
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Old 09-04-2011, 09:38 AM   #260
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Availability of the OE CTS-V rotors has been problematic. I am checking with the source to see if there is anything we can do to alleviate this. I should have a response back shortly.
Only took 1 day for me to get some last week from buygmpartsdirect.com
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Old 09-04-2011, 10:36 AM   #261
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Only took 1 day for me to get some last week from buygmpartsdirect.com

How much did they run you?
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Old 09-04-2011, 06:59 PM   #262
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About $250 + shipping
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Old 09-05-2011, 10:20 PM   #263
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Quote:
mike@thepowdercoater.com originally posted this in a self standing thread. I thought it was worth reporting it here. Thanks for a great tip Mike.

Quote: Originally Posted by mike@thepowdercoater.com
I know its a popular upgrade, but be advised that when swapping the rears out for cadillac rears, the balance tubes should be moved to the opposite side of the cadillac caliper before installation.

On the camaro caliper, the crossover tube is on the side with the smaller piston. Because the caliper sits on the leading edge of the rotor on the cadillac, rather than the trailing edge like the camaro, the crossover tube is on the side with the larger piston.

The reason for the difference is pad wear and taper. The leading edge wears faster and generates more heat, so to compensate for it, perfomance caliper manufacturers put smaller pistons on the leading edge.

Fronts are oriented the same on both cars, so if doing a front only upgrade there is no issue.

Just some friendly advice from your local powdercoater.


Quote:
Originally Posted by JusticePete
That is a great tip. We did flip them on our install, but I do not think we made it as clear as you did.


I've got the gen1 CTS-V calipers on the front of my G8. Now that we have a solution for keeping the ebrake, I'm looking to complete the installation with the gen1 CTS-V calipers on the rear.

Both gen1 and gen2 CTS-V models had the rear calipers mounted on the forward side of the rotor. Both also had the crossover tube on the lower side of the caliper, which based on what Mike said, would be on the LARGER piston.

I'm trying to grasp the design rational of the larger vs smaller pistons, and position relative to the rotor. Is the mounting of the CTS caliper on the "leading edge" of the rotor considered "leading edge" because it is "forward" of the axle, vs the Camaro on the "trailing edge" because it is "aft" of the axle?

I was thinking the "leading edge" of the rotor would be the first portion of the rotor to enter the caliper, hitting the pad first.

Could you please elaborate on this for me? THANKS!
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Old 09-07-2011, 04:15 PM   #264
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Originally Posted by 08G8V8 View Post
I've got the gen1 CTS-V calipers on the front of my G8. Now that we have a solution for keeping the ebrake, I'm looking to complete the installation with the gen1 CTS-V calipers on the rear.

Both gen1 and gen2 CTS-V models had the rear calipers mounted on the forward side of the rotor. Both also had the crossover tube on the lower side of the caliper, which based on what Mike said, would be on the LARGER piston.

I'm trying to grasp the design rational of the larger vs smaller pistons, and position relative to the rotor. Is the mounting of the CTS caliper on the "leading edge" of the rotor considered "leading edge" because it is "forward" of the axle, vs the Camaro on the "trailing edge" because it is "aft" of the axle?

I was thinking the "leading edge" of the rotor would be the first portion of the rotor to enter the caliper, hitting the pad first.

Could you please elaborate on this for me? THANKS!
You are correct.

The leading edge is in reference to the rotation of the rotor to the caliper when driving forward. We'll call the smaller Piston #1. When the Caliper is mounted on the front side of the rotor Piston #1 is on top and the cross-over tube on the bottom. To keep the leading edge orientation the same when mounted on the backside of the leading edge Piston #1 is on the bottom. That is why the cross-over tube is moved.
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Old 09-07-2011, 05:53 PM   #265
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You are correct.

The leading edge is in reference to the rotation of the rotor to the caliper when driving forward. We'll call the smaller Piston #1. When the Caliper is mounted on the front side of the rotor Piston #1 is on top and the cross-over tube on the bottom. To keep the leading edge orientation the same when mounted on the backside of the leading edge Piston #1 is on the bottom. That is why the cross-over tube is moved.

Here is a photo of a drivers side rear CTS-V on the left. As you state, the smaller Piston #1 is on the top of the caliper and the cross-over tube is on the bottom of the caliper. As the rotor goes around forward, it hits Piston #1 first.

You take that same drivers side rear CTS-V caliper and rotate is 180 degrees to mount it on the rear of the axle, the picture on the right, Piston #1 now moves to the bottom of the caliper and the cross-over tube to the top. Rotor rotation remains the same, so as the rotor rotates forward, it still hits Piston #1 first.

This looks like it keeps the leading edge orientation as you stated above. What am I missing here?
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Old 09-07-2011, 06:01 PM   #266
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Originally Posted by 08G8V8 View Post
Here is a photo of a drivers side rear CTS-V on the left. As you state, the larger Piston #1 is on the top of the caliper and the cross-over tube is on the bottom of the caliper. As the rotor goes around forward, it hits Piston #1 first.

You take that same drivers side rear CTS-V caliper and rotate is 180 degrees to mount it on the rear of the axle, the picture on the right, Piston #1 now moves to the bottom of the caliper and the cross-over tube to the top. Rotor rotation remains the same, so as the rotor rotates forward, it still hits Piston #1 first.

This looks like it keeps the leading edge orientation as you stated above. What am I missing here?
The bleeder port is on the bottom when the caliper is aft of the axle! You can't bleed it that way....
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Old 09-07-2011, 06:03 PM   #267
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That's what I thought the reason for changing the cross-over tube was, but the explanations given above are talking about maintaining the piston position. Don't see how piston position has changed, relative to rotor rotation!
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Old 09-07-2011, 06:17 PM   #268
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That's what I thought the reason for changing the cross-over tube was, but the explanations given above are talking about maintaining the piston position. Don't see how piston position has changed, relative to rotor rotation!
Your right... it hasn't changed the leading piston as you have described it.
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Old 09-07-2011, 08:51 PM   #269
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Justice Pete I have a CTSV and my front rotors warped at 11k miles, 4 dealers and none of them would fix this under warranty. Dealer cost on rotors i think was $800 but nobody had stock so I got frustrated and had them wet stone ground on this machine. They came out great but still have a slight shimmy. and I want new rotors badly

Any suggestions I also don',t want to spend $1300 on rotors for a car i am keeping another 12 months max. Aftermarket makes rears but nobody makes fronts.

Il be honest from Day 1 i never was impressed with these CTSV brakes, I swapped out lines fluid and 3 versions of the HAWK pads, I am now running HPS Street pads, i swear my AMG C63 and old BMW M5 stop much better and have better initial bite.

Not sure what all these OEM parts cost today or how hard to get but id say a Brembo aftermarket or Baer might give better performance overall. I waited 2 months trying to get front rotors and no luck.

Let us know what turns out of for alternatives.
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Old 09-07-2011, 09:37 PM   #270
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That's what I thought the reason for changing the cross-over tube was, but the explanations given above are talking about maintaining the piston position. Don't see how piston position has changed, relative to rotor rotation!
Two things are of key importance when positioning calipers:

1. The bleed screws must be at the top, pointing upward. You'll never get the air bled out if they are pointing down.

2. The rotor meets the brake pad on the small piston end first. The larger piston is at the trailing edge to keep radial pad taper under control.
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Old 09-07-2011, 09:41 PM   #271
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Justice Pete I have a CTSV and my front rotors warped at 11k miles, 4 dealers and none of them would fix this under warranty. Dealer cost on rotors i think was $800 but nobody had stock so I got frustrated and had them wet stone ground on this machine. They came out great but still have a slight shimmy. and I want new rotors badly

Any suggestions I also don',t want to spend $1300 on rotors for a car i am keeping another 12 months max. Aftermarket makes rears but nobody makes fronts.

Il be honest from Day 1 i never was impressed with these CTSV brakes, I swapped out lines fluid and 3 versions of the HAWK pads, I am now running HPS Street pads, i swear my AMG C63 and old BMW M5 stop much better and have better initial bite.

Not sure what all these OEM parts cost today or how hard to get but id say a Brembo aftermarket or Baer might give better performance overall. I waited 2 months trying to get front rotors and no luck.

Let us know what turns out of for alternatives.
Sounds more like a pad bedding problem as opposed to a rotor issue. Try rebedding EXACTLY like Hawk recommends.

There is a YouTube video you can search for. HPS are OK pads, but not high in initial bite. You might want to try other options, but you will need to put up with more dust than the HPS.
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Old 09-07-2011, 09:43 PM   #272
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2. The rotor meets the brake pad on the small piston end first. The larger piston is at the trailing edge to keep radial pad taper under control.
So I have not seen the CTS-V caliper, but based on JusticePete's response above, the larger piston is on the leading edge. Not sure if this is true or not, but if it is, did Cadillac screw up?

Here are a few pics from one of the G8 guys who took Camaro calipers and installed them on the rear.

You can see the larger piston is on the side with the crossover tube, which is the leading piston when installed on the G8 the same as when installed on the Camaro, and also seems to match the Cadillac.






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Old 09-08-2011, 02:09 AM   #273
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So I have not seen the CTS-V caliper, but based on JusticePete's response above, the larger piston is on the leading edge. Not sure if this is true or not, but if it is, did Cadillac screw up?

Here are a few pics from one of the G8 guys who took Camaro calipers and installed them on the rear.

You can see the larger piston is on the side with the crossover tube, which is the leading piston when installed on the G8 the same as when installed on the Camaro, and also seems to match the Cadillac.





I don't know who screwed up what, but that first picture is a LHL (Left Hand Leading) caliper. This means that it is to be mounted on the forward side of the axle and on the left side of the car.

Your 2nd picture is a LHT (Left Hand Trailing) position, but a LHL caliper is mounted there = FAIL!

You need to swap the pipes and bleeders on each caliper (turns a LHL caliper into a RHT and vice versa) and mount them on the opposite sides of the car --> done!
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Old 09-08-2011, 08:42 AM   #274
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THANKS, I understand. I was confused based on the statement above from JusticePete stating the larger piston 1 being at the top(leading) position when mounted on the leading edge, and the pictures of the caliper I posted. It looks like after these calipers were re-assembled after refinishing, they did not put the crossover tube and bleeders in the proper position.

I now understand the statement from mike@thepowdercoater.com, the leading piston on both the Camaro and CTS-V calipers is the smaller piston, but crossover tube changes based on mounting position. This differs from what JusticePete stated, but then saw the pictures I posted so I was not sure what was right/wrong! "On the camaro caliper, the crossover tube is on the side with the smaller piston. Because the caliper sits on the leading edge of the rotor on the cadillac, rather than the trailing edge like the camaro, the crossover tube is on the side with the larger piston."


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Old 09-08-2011, 10:35 AM   #275
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Here is a photo of a drivers side rear CTS-V on the left. As you state, the larger Piston #1 is on the top of the caliper and the cross-over tube is on the bottom of the caliper. As the rotor goes around forward, it hits Piston #1 first.

You take that same drivers side rear CTS-V caliper and rotate is 180 degrees to mount it on the rear of the axle, the picture on the right, Piston #1 now moves to the bottom of the caliper and the cross-over tube to the top. Rotor rotation remains the same, so as the rotor rotates forward, it still hits Piston #1 first.

This looks like it keeps the leading edge orientation as you stated above. What am I missing here?
You missed nothing and your illustration is spot on
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