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  1. #1
    OpelAus Forum Addict JohnBu's Avatar
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    QFM HPX Observation

    Finally installed the QFM HPX onto the front axle of my SRi Turbo a few weeks /1,000km ago, together with new brake fluid.

    I purchased them 21 months ago on special- thanks Greg! I still have the rears that I haven't used.

    They don't come with the brake wear sensor, however I reused my old ones and they fit into the new pads, which I thought was a nice touch.

    Xpolsv57 gave me a hand- thanks Steve.

    These replaced EBC Greenstuffs, which were terrible.

    Ok, thoughts, they bite very well from cold and very smooth.. unlike the Greenstuff, which wouldn't bite until you rake harder and then lock up kicking in ABS.

    I haven't tracked them, nor had spirited drives down a Mountain, so can't give my experience on fade.

    So they bite well from cold and don't have much brake dust. The rears with the smaller OEM pads has alot more brake dust.

    My only negetive is that they 'squeal' at low speeds before coming to a complete stop, we used ample grease, so I'm are unsure of the reason.. perhaps a track day may get rid of the squeal. The squeal doesn't sound like grumble of the pads, it may be the clips from the backing plate.

    Apart from squeal, which I'm can't say is from the installation, or the pads, I highly recommended them for the price.
    Click here to enlarge Warning: This is an Old Thread
    This discussion is older than 120 days. information contained in it may no longer be current . Please think of the children before resurrecting this ancient thread!
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  2. #2
    Chief BrOtEk Engineer xplosv57's Avatar
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    Could also be due to not replacing the disc, the disc will have a small lip and until the pad has worn into the lip, it will squeal!!

    Your method of getting rid of the squeal can be good and bad!!

    Mine didn't squeal till my first squirt up mountain roads, then squealed for a couple of months till i tracked it, then went away!!
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  3. #3
    OpelAus Forum Hierarchy Nurb608's Avatar
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    Mine squeel if I haven'e used them hard for a long time. Just give it a couple of hard breaking cycles and it should get rid of it, but as Steve said, wear them into the rotors first.
    Track Times: Phillip Island - 1:59.4027, Calder Park - 1:08.8142, Winton 3km - 1:40.7810, Sandown - 1:29.6000, Haunted Hills - 62.55, 1/4 Mile - 13.736

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  4. #4
    OpelAus Forum Addict JohnBu's Avatar
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    Seems the squeal has gradually improved, however I didn't use the car over the weekend, whereas I generally drive it every day. lol.

    What pads you running Rory?
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    OpelAus Owner hazrd's Avatar
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    ive had the QFMs in the SRi for months now, and they only stopped squealing recently, they just need to be worn in a fair bit (probably doesnt help that the main driver is a hanny driver)... the bite on braking will improve even more when the squealing has completely stopped

    now its time for rears, they have started squealing now Click here to enlarge
    Sure, we dont have to worry about viking raids or scurvy anymore, but instead we make a daily routine of sitting in flimsy, fibreglass (or metal) boxes full of gasoline which are propelled in opposing directions on the freeway at velocities matching that of low flying aircraft.

    This is a roundabout way of saying that cars are dangerous....

  6. #6
    OpelAus Forum Hierarchy Nurb608's Avatar
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    Click here to enlarge Originally Posted by JohnBu Click here to enlarge
    What pads you running Rory?
    No idea, ferrodos or however you spell it I think.
    Track Times: Phillip Island - 1:59.4027, Calder Park - 1:08.8142, Winton 3km - 1:40.7810, Sandown - 1:29.6000, Haunted Hills - 62.55, 1/4 Mile - 13.736

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  7. #7
    OpelAus Forum Addict JohnBu's Avatar
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    Glad to know I'm not the only one...

    Maybe I'll take it for a run down Mt Dandenong with a few hard stops.

    PS, I did break in the brake pads, brake at 80kmh to a near stop, repeat, repeat, repeat, repeat.

    After the first braking attempt, I hear 'what the **** you doing?' from my beautiful fiancee.
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    OpelAus Forum Sponsor gslrallysport's Avatar
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    QFM's are what's known as a high transfer pad. They rely on alot of their own material on the rotor for them to interact properly. Often it can take a little longer than ideal for them to shut up...
    - GSL RallySport - Ph: 1300 884 836 -
    Sick of paying too much for high performance brake pads? Want high performance and cold bite with low rotor wear?
    - QFM Performance Brake Pads -
    Also specialising in
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  9. #9
    OpelAus Forum Addict JohnBu's Avatar
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    Well, if that is the case, I'll should be happier with them over time Greg.

    I don't really notice the squeal 99% of the time, it doesn't bother me too much.

    The only time I notice it is when I come to the complete stop in my carparking spot as it is enclosed, and the noise will bounce off the walls.

    I'd rather live with the noise than have the brake dust the OEM pads produce.
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  10. #10
    OpelAus Forum Sponsor gslrallysport's Avatar
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    If it becomes too much of an issue, EBC make a stick on shim kit, similar to what comes standard on TRW/Remsa/EBC pads. It's $17.50 per axle set, and targets the exact problem, as squeal is caused by harmonics between the backing plate and the caliper itself.
    - GSL RallySport - Ph: 1300 884 836 -
    Sick of paying too much for high performance brake pads? Want high performance and cold bite with low rotor wear?
    - QFM Performance Brake Pads -
    Also specialising in
    - DMS High Performance Shock Absorbers - Monit Rally Computers -

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