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    1. #1
      Join Date
      Feb 2014
      Location
      Boise , Idaho
      Posts
      320
      Country Flag: United States

      340MM fronts what size rears ?

      I will be going with the Corvette 340MM front brakes on my 64 El camino and was wondering what size rears I should use ? 305 or 330MM ?



    2. #2
      Join Date
      Nov 2009
      Location
      the dirty mitten
      Posts
      1,212
      Country Flag: United States
      Larger rotors do not really increase brake force as much as you may think. Larger rotors are to a degree more of just eye candy. I used smaller rear rotors to save some weight. You can then dial in your brakes with a prop valve and pad compounds
      Steve
      1968 Dodge Charger All Wheel Drive project Red Bull<script type="text/javascript" src="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/5cce6da5/background/helpers/prefilterHelper.js"></script><script type="text/javascript" src="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/85dc54c0/background/helpers/prefilterHelper.js"></script><script type="text/javascript" src="safari-extension://com.ebay.safari.myebaymanager-QYHMMGCMJR/85dc54c0/background/helpers/prefilterHelper.js"></script>

    3. #3
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,975
      Country Flag: United States
      Quote Originally Posted by Paraman1 View Post
      I will be going with the Corvette 340MM front brakes on my 64 El camino and was wondering what size rears I should use ? 305 or 330MM ?
      I'd go with 305mm, but more importantly you need to match the front to rear piston area.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    4. #4
      Join Date
      Feb 2014
      Location
      Boise , Idaho
      Posts
      320
      Country Flag: United States
      Quote Originally Posted by andrewb70 View Post
      I'd go with 305mm, but more importantly you need to match the front to rear piston area.

      Andrew
      I will be running the Corvette brakes via a Kore3 kit and have front and rear calipers off of the same car . I am also running a Wilwood master with the prop valve . Is there something else I should be looking in regards to the front to rear piston area ?

    5. #5
      Join Date
      Apr 2001
      Location
      The City of Fountains
      Posts
      15,975
      Country Flag: United States
      Quote Originally Posted by Paraman1 View Post
      .....Is there something else I should be looking in regards to the front to rear piston area ?
      You should be good with that.

      Andrew
      1970 GTO Version 3.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    6. #6
      Join Date
      Jan 2006
      Location
      Oregon
      Posts
      1,773
      Country Flag: United States
      The 330mm C6 Z51 rear kit actually uses a smaller piston diameter (42.5mm) than the 305mm base level kits (45mm), so it basically offsets the increase in brake torque due to the larger rotor diameter, so you should be fine.
      It's what I does.





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