CTS-V brakes

[rocket69GTP]

A bit of an odd question but someone made these work on their GP and was curious to know if the brake booster would need to be changed out? The pistons are 30% smaller than the f-body brakes but I know caliper size along with the fact that you are running double the amount of pistons will increase brake pedal travel considerably. What is the best way to minimize this besides running SS brake lines? The only thing I could think of is changing out the brake booster but what would work best in this application?

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[02BlueGT]

Well, it would be the Master Cylinder that you would change, not the booster, booster change only changes the force it takes you to move the pedal. You would want a different master, as even though it may seem like a small difference, it will most likely make a big difference in pedal travel

 

[SinisterSHO]

I dont think you would need to do anything. If they'll bolt on and fit under your wheels, do it. You may need to add more fluid to fill the calipers, but I doubt you would need a bigger booster or master cylinder. I run 6 piston Wilwoods on my track car with no modifications.

 

[syP]

I run 6 piston Wilwoods on my track car with no modifications.

 

[02BlueGT]

I dont think you would need to do anything. If they'll bolt on and fit under your wheels, do it. You may need to add more fluid to fill the calipers, but I doubt you would need a bigger booster or master cylinder. I run 6 piston Wilwoods on my track car with no modifications.

Brakes are Hydraulic= size of pistons directly affect transfer of force and the transfer of distance. No one is saying it wouldn't work, but moving the brake pedal even an inch more than stock to apply a similar amount of movement to the caliper can mean some bad things in a heavy braking or panic situation

 

[TraptPatriot]

I think there was a post on CGP describing CTS-V brakes, but honestly I don't remember where it came from. From what I do remember, it required changing the hub and all that.. Not 100% sure though. And yea, probably need a bigger master cylinder.

 

[The Broken Regal]

I researched this a couple years ago, everything will bolt-on... there is a new thread on clubgp

only problem is how the car will be affected with the smaller pistons... and you need 18s that will clear the brakes, not sure on a spare either

LOTS of rotating mass, but ultra cool factor is there

For the same money you can get a 16" dual piston wilwood setup that bolts up and combined with a billet caliper and 2 piece rotor, drops 35lbs off the front end!

 

[TraptPatriot]

I researched this a couple years ago, everything will bolt-on... there is a new thread on clubgp

only problem is how the car will be affected with the smaller pistons... and you need 18s that will clear the brakes, not sure on a spare either

LOTS of rotating mass, but ultra cool factor is there

For the same money you can get a 16" dual piston wilwood setup that bolts up and combined with a billet caliper and 2 piece rotor, drops 35lbs off the front end!

I thought 17's would fit too? Certain ones anyway. Because the CTS-V spare is a 17.

 

[The Broken Regal]

I thought 17's would fit too? Certain ones anyway. Because the CTS-V spare is a 17.

Really? If GXP brakes barely fit under 17s, then 14.x CTS-V brakes are gonna cut it close on 18s, let alone 17s... then again the caliper is MUCH shallower because its 4-pot, not sliding with the connector over the top of the rotor.. hmmmm

 

[Mike K]

They don't bolt on easily. You need adapters for them. The calipers can be had cheap though. Last time I priced them out we got them for $140 loaded.

 

[TraptPatriot]

Really? If GXP brakes barely fit under 17s, then 14.x CTS-V brakes are gonna cut it close on 18s, let alone 17s... then again the caliper is MUCH shallower because its 4-pot, not sliding with the connector over the top of the rotor.. hmmmm

Like I said, my memory is a little fuzzy on this topic, but I think someone said the spare tire from the CTS-V clears. Maybe because the offset is lower? Been months since I even read up on it lol.