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Brake Pad & Rotor Upgrade

Discussion in 'Gen 3 Prius Accessories and Modifications' started by Matth Torrijos, Feb 15, 2022.

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  1. Matth Torrijos

    Matth Torrijos Active Member

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    Update: drove the car from San Diego, California to Seattle, Washington. After this long trip I noticed my car does brake a bit better than my old stock setup. Brake response is quicker than stock. The sound that I was hearing from my initial install went away and I can't hear the brakes anymore. I'm planning on installing the hawk front pads still, but I'm thinking of sanding down the backplate or installing one side first then change the other side. I'll post another update when I install the front hawk pads.
     
    #41 Matth Torrijos, Mar 14, 2022
    TacoPapi and Montgomery like this.
  2. Matth Torrijos

    Matth Torrijos Active Member

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    Update: finally got to install the front. But having just a slight clearance issue. The pads are too thick for the calipers. So my solution was to install one side first (front side) and install the other side after 40k driving. I did this so that I can wear out a little bit of the pads to fit the caliper. 20220625_173035.jpg
     
    #42 Matth Torrijos, Jun 26, 2022
  3. ChapmanF

    ChapmanF Senior Member

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    I'd have thought getting the pad dimensions right would be a top priority for an aftermarket supplier.
     
    #43 ChapmanF, Jun 26, 2022
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  4. ASRDogman

    ASRDogman Senior Member

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    OUCH! Wouldn't it just be best to get the correct pads for the car?


     
    #44 ASRDogman, Jun 26, 2022
  5. Matth Torrijos

    Matth Torrijos Active Member

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    I'll definitely reach out to hawk so that their future products will fit our prius
     
    #45 Matth Torrijos, Jun 26, 2022
  6. Matth Torrijos

    Matth Torrijos Active Member

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    It says that it fits our prius but when I tried installing the pads, it won't fit
     
    #46 Matth Torrijos, Jun 26, 2022
  7. black_jmyntrn

    black_jmyntrn Senior Member

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    id return and not use... heck even getting some cheep new pads from autozone is better than driving one side new pad one side old pad
     
    #47 black_jmyntrn, Jun 26, 2022
  8. Matth Torrijos

    Matth Torrijos Active Member

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    I was going to but the seller said since I attempted to install it and there's a slight scratch on the cover plate, it's not returnable anymore even if it doesn't fit.
     
    #48 Matth Torrijos, Jun 26, 2022
  9. ChapmanF

    ChapmanF Senior Member

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    Sellin' pads that don't fit, then sayin' they can't be returned ....

     
    #49 ChapmanF, Jun 26, 2022
  10. ASRDogman

    ASRDogman Senior Member

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    If you got them off ebay, yes you can. Unless you've already damaged them.
    Just do a return saying they don't fit. Unless you are past the time to return.
    You could contact your credit card company and they might be able to help with the return.


     
    #50 ASRDogman, Jun 26, 2022
  11. Matth Torrijos

    Matth Torrijos Active Member

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    I got them from Amazon from a private seller. I message them after one week of buying it and that's when they refused the return. So it's been about 3 months now and I just want to install one side at least so I can run the pads instead of wasting them. I've contacted Hawk company directly, just now, and hopefully they can help me out.
     
    #51 Matth Torrijos, Jun 26, 2022
  12. ASRDogman

    ASRDogman Senior Member

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    I think it's past time then...

     
    #52 ASRDogman, Jun 26, 2022
  13. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Cut your losses??
     
    #53 Mendel Leisk, Jun 26, 2022
  14. Matth Torrijos

    Matth Torrijos Active Member

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    Update: Rear pads started to be really squeaky, my thought is maybe i needed the rear rotors swapped to slotted to prevent noise. So far thats the issue im having.
     
    #54 Matth Torrijos, Jul 14, 2022
  15. ChapmanF

    ChapmanF Senior Member

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    What did you do for shims?

    I recently replaced my rear pads and shims. Bought Toyota. The pads are updated since the ones installed at the factory. There was a TSB about it (T-SB-0248-12). The new shims are crazy elaborate, not just flat metal. The TSB has a new way of applying the shim grease, different from the way the repair manual showed. It was like a whole religious ritual ... I probably spent half an hour just applying the shims and the shim grease before putting the pads in the calipers.

    But anyway, they don't squeak.
     
    #55 ChapmanF, Jul 14, 2022
  16. Matth Torrijos

    Matth Torrijos Active Member

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    I just left the shims how it is from the box, I just made sure that everything is well greased
     
    #56 Matth Torrijos, Aug 23, 2022
  17. Matth Torrijos

    Matth Torrijos Active Member

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    Update: Replaced the rear Hawk Pads with Ceramic ones because of the squeaking noise whenever Air out. (im running air bag suspension on my Prius) Every time the car airs out the rear tires shift forwards. Since the hawk pads aren't full ceramic it makes a loud screeching sound whenever I park. I still left my front EBC rotors and Hawk pads because you can definitely tell that the brakes have more stopping power with that setup (even with half OE and half Hawk). But for the rears, it's not that necessary to upgrade. the only difference i saw is that the rear locks the tire more when engaging the Ebrake. so the performance on the rear is just on the E brake, which i don't use when driving lol. Anyways I'm happy with the fronts and I cant wait to put all hawk pads on the fronts when it's time.
     
    #57 Matth Torrijos, Aug 23, 2022
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  18. 2zrmpg

    2zrmpg New Member

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    so i did a little research and if you want to upgrade ur prius brakes you will need Toyota Corolla rotors and caliper brackets and possibily pads. heres the facts:
    Prius Rotors: 255mm diameter 25mm thick
    Corolla Rotors: 275mm diameter 22mm thick
    Corolla Rotors: 283mm diameter 22mm thick
    Prius caliper piston: 57mm
    Corolla caliper piston: 60mm
    Prius Hub Center Bore: 54.1mm
    Corolla Hub Center Bore: 54.1mm
    Prius Bolt Pattern: 5x100mm
    Corolla Bolt Pattern: 5x100mm
    obviously the prius uses a short thick brake caliper which potentially helps with warping. the corolla uses a larger sportier rotor to fill the wheel well better. i will be looking to upgrade to corolla brakes soon.
    remember the subarus are 5x100mm with a 56.1mm center bore
     
    #58 2zrmpg, Jun 25, 2023
    Matth Torrijos and bisco like this.
  19. bisco

    bisco cookie crumbler

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    thanks!
     
    #59 bisco, Jun 25, 2023
  20. black_jmyntrn

    black_jmyntrn Senior Member

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    wait wait wait... no one knew the FRS brakes work? Huh? but then, why replace it with OE FRS when you could pop on a BBK? maybe I am just thinking too far into this. but... I mean... I'm using the rear FRS rear wheel bearing on the AWD conversion so I have to match it with the front bolt patterns. just... FRS BBK THO!

    what I can't wait to see is the logged data to compare the total energy stored from braking on the PHEV! I haven't checked if this data point is on the none PHEV but for you folks attempting brake upgrades, it would be good proof in the pudding to know this and other data points prior to your modifications and after!

    I am waiting to receive custom pcb obd2 boards with Bluetooth and wifi built in, along with an sd card slot. So no need to have a smart device or other always open to store the vehicle's data. Can read codes, just need to test if it'll read enhanced diagnostics heck, no USB port yet but if can control Techstream via wifi with this device I'll be happy, else ill settle for a USB port added on with USB-C to communicate with Techstream. That to say, I hope they hurry and arrive, for a sub $100 data logging code clearing techstreaming device I might have found a winner, and the perfect use case is logging data before and after upgraded brakes.
     
    #60 black_jmyntrn, Jun 25, 2023
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