Results 1 to 12 of 12

Thread: Anyone try RockAuto brake drums?

  1. #1
    Registered User mlc240z's Avatar
    Member ID
    CZCC-7517
    Join Date
    Dec 2004
    Location
    Central NJ
    Posts
    779

    Default Anyone try RockAuto brake drums?

    As title says, MSA wants $98 each, Black Dragon $90 each for rear drums for a '71.
    RockAuto wants $28 each for, admittedly, aftermarket rear drums. Can't verify if MSA/BD are aftermarket also.

    Anyone get these and if so, did they fit and perform acceptably?

    I'm tempted to spend/waste the $60 (Saving $120-$140) to see if they're worth it.
    Last edited by mlc240z; 05-13-2010 at 03:45 PM.
    Bart

    5/71 240z, HLS30-31306, mostly stock, ZTherapy SU's, Pertronix, Eibach ProKit, KYB, Poly bushings, 60 amp alternator w/Dave's plug bypass, headlight and parking light harness upgrades.

  2. #2
    Semi-retired admin Arne's Avatar
    Member ID
    CZCC-8596
    Join Date
    Jun 2005
    Location
    Eugene, Oregon, USA
    Age
    64
    Posts
    8,465

    Default

    I suspect those are steel, not aluminum. Should still work OK though.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  3. #3
    HL S30 151764
    Member ID
    CZCC-19963
    Join Date
    Aug 2009
    Location
    North Texas
    Posts
    158

    Default

    I'd take them to your local auto parts store and have them turned before putting them on the car. Many cheap foreign made drums and rotors are warped from the factory.

  4. #4
    Registered User mlc240z's Avatar
    Member ID
    CZCC-7517
    Join Date
    Dec 2004
    Location
    Central NJ
    Posts
    779

    Default

    Arne,
    Aren't the brake shoe contact surfaces all steel/steel-lined?
    Do you see any drawbacks or problems with cast iron/steel vs aluminum/steel drums?

    pwd,
    Yup, I've learned that the hard way. Had luck with some right out of the box, no luck with others.
    Bart

    5/71 240z, HLS30-31306, mostly stock, ZTherapy SU's, Pertronix, Eibach ProKit, KYB, Poly bushings, 60 amp alternator w/Dave's plug bypass, headlight and parking light harness upgrades.

  5. #5
    RLS30-013490 oldhemi's Avatar
    Member ID
    CZCC-20605
    Join Date
    Dec 2009
    Location
    Houston Texas USA
    Age
    69
    Posts
    174

    Default

    I know the racers want aluminum and have been moaning about the lack of new units. I have been extremely fortunate to have 2 people offer me their old units because they are converting to discs!

    Yes the linings themselves are steel.

    One bonus on the steel units would be that they SHOULD be easier to remove in the future due to like materials on the hub. That aluminum/steel combo just does not want to play nice.
    Last edited by oldhemi; 05-14-2010 at 09:03 AM.
    Original owner of early '74 260Z that was rode hard and put away wet. Gonna try to revive it from a long sleep. I am old enough to know better - right, like that's ever gonna happen.
    Pictures of La cagada marrón

  6. #6
    Low Budget/High Value
    Member ID
    CZCC-20342
    Join Date
    Oct 2009
    Location
    Washington County, OR
    Posts
    3,629

    Default

    Quote Originally Posted by mlc240z View Post
    As title says, MSA wants $98 each, Black Dragon $90 each for rear drums for a '71.
    RockAuto wants $28 each for, admittedly, aftermarket rear drums. Can't verify if MSA/BD are aftermarket also.

    Anyone get these and if so, did they fit and perform acceptably?

    I'm tempted to spend/waste the $60 (Saving $120-$140) to see if they're worth it.
    jacobmccabe92 might have some used...

    http://www.classiczcars.com/forums/s...794#post327794

  7. #7
    Registered User mlc240z's Avatar
    Member ID
    CZCC-7517
    Join Date
    Dec 2004
    Location
    Central NJ
    Posts
    779

    Default

    OK, had to do it.
    Just ordered 2 from RockAuto. With 5% discount (Thanks Johnny'O) and 3Day UPS ship came to $66.
    I'll let you know how they are installed.
    Bart

    5/71 240z, HLS30-31306, mostly stock, ZTherapy SU's, Pertronix, Eibach ProKit, KYB, Poly bushings, 60 amp alternator w/Dave's plug bypass, headlight and parking light harness upgrades.

  8. #8
    Registered User zcar70's Avatar
    Member ID
    CZCC-4258
    Join Date
    May 2003
    Location
    Webster, NY
    Age
    63
    Posts
    138

    Default

    The drums on my car are from Rock Auto and work perfectly. And they are aluminum.....

  9. #9
    Registered User
    Member ID
    CZCC-21037
    Join Date
    Feb 2010
    Location
    usa
    Age
    33
    Posts
    8

    Default

    thanks for sharing the information i hope that you will share more that type in future thanks

    cheers


    Rueckfahrkamera

  10. #10
    Registered User mlc240z's Avatar
    Member ID
    CZCC-7517
    Join Date
    Dec 2004
    Location
    Central NJ
    Posts
    779

    Default

    Got them from Rock and installed Saturday.
    Centric brand and they are cast iron. A little heavier than stock aluminums, but not too bad. Comes sprayed matte black.

    Quality seems good and so far no problems.
    Don't notice any defects or out of round.
    Bart

    5/71 240z, HLS30-31306, mostly stock, ZTherapy SU's, Pertronix, Eibach ProKit, KYB, Poly bushings, 60 amp alternator w/Dave's plug bypass, headlight and parking light harness upgrades.

  11. #11
    Registered User
    Member ID
    CZCC-15981
    Join Date
    Jan 2008
    Location
    SE Florida
    Age
    53
    Posts
    41

    Default

    If the Rock Auto drums are TRUELY aluminum for that price---grab them and thank your lucky stars. Factory aluminum drums are FAR superior to the cast iron replacements sold by the auto parts chains---primarily due to the weight difference. The iron replacements will work fine and priovide good service---but they are TWICE the weight of the factory aluminum drums. And ALL of this added weight is UNSPRUNG weight. That GROSS increase in unsprung weight makes a light Z car ride like a TRUCK and reduces the ability of the independent rear suspension to react to road shock/bumps DRASTICALLY. Do some reasearch on the effects of additional UNSPRUNG weight on ride/handling dynamics before you put those 25 pound ANVILS on the back of your car..! Add some HEAVY oversized wheels and tires and you will COMPLETELY RUIN the way a Z car handles, steers, brakes and rides!

  12. #12
    HL S30 151764
    Member ID
    CZCC-19963
    Join Date
    Aug 2009
    Location
    North Texas
    Posts
    158

    Default

    Chevrolet used cast iron drums on the Corvette back when they had a disc/drum combo. They were more than a little concerned about performance and understood the principle of unsprung weight. They also knew about Aluminum drums, which were on some GM cars at the time.

    Aluminum is preferred for fast heat dissipation more than weight reduction. Brake fade is a much bigger problem in course racing than unsprung weight.

    I seriously doubt if Rock Auto is offering Aluminum drums. No one seems to have them.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 5-Bolt Brake Drums
    By Jetaway in forum Wheels, Tires and Brakes (S30)
    Replies: 3
    Last Post: 09-11-2009, 09:29 PM
  2. Brake Fluid 101
    By Ed in forum Tech Pubs and HowTo
    Replies: 4
    Last Post: 09-10-2005, 03:44 AM
  3. 72 240Z Brake Light Wiring
    By 72SLOZ in forum Tech Pubs and HowTo
    Replies: 0
    Last Post: 07-02-2005, 03:35 PM
  4. Question about S30 rear disc brakes....
    By e_racer1999 in forum Wheels, Tires and Brakes (S30)
    Replies: 19
    Last Post: 08-21-2004, 08:54 AM
  5. DOT-4 vs DOT-3 brake fluid
    By TomoHawk in forum Wheels, Tires and Brakes (S30)
    Replies: 15
    Last Post: 12-07-2003, 06:40 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •