Rear Brake upgrade for q70

Forum for Infiniti M37, M56 M35h Hybrid and Q70 owners.
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bbqbrisket
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I want to change the rear calipers to the same size as the larger front ones.
Would I have to change the rotor size as well?


EdBwoy
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Yes. If your front rotors are larger than the rear rotors, then you need to make sure that whatever rotors you use with the new caliper are appropriately sized for it.

If I may ask, why do you want to do that?
And does your car currently have the sport brakes?

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bbqbrisket
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Rear brakes are going out every 25000
The front have not needed replacement ever even after 70k

EdBwoy
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I see. I understand why that might be a cause for concern.

First, I have to applaud you for taking the initiative to check all your brakes that often.

Second, I wanted to clarify what kind of brake system you have. This is sort of important to the discussion. Do your current calipers look like this?
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DSC_0037~2.JPG

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bbqbrisket
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thanks for responding....
No, When I look on line for parts, it shows what you have shown me.
Mine have an open design as you can see.
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DACD45E1-693F-4FE6-A92B-4F49E76D83B6.JPG

EdBwoy
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bbqbrisket wrote:
Wed Aug 17, 2022 4:31 am
thanks for responding....
No, When I look on line for parts, it shows what you have shown me.
Mine have an open design as you can see.
Ok, great info! Your car has the base model/non-sport brake system.

We have come to learn that with these vehicles, the base rear calipers (like yours) usually have a higher incidence of failure. Sometimes the pistons or slide pins seize in position, but other times it's an issue of them not retracting properly.
In such cases, the brake pad wear could be accelerated. This can usually be troubleshot in various ways, if you'd like to go down that route.

If I were to recommend any rear brake upgrades for your application, then I would suggest that you upgrade to the sport brakes, usually referred to as the Akebono BBK.
While there are some initial costs to be accounted for, I believe the benefits will far outweigh the downsides in the long run for you:
1. They are more reliable in operation, and are relatively easier to maintain, compared to base calipers.
2. They are mostly a bolt-on upgrade. Far easier than trying to adapt the front caliper to the rear hub
3. It is a tried and tested process, with lots of instructional content out there.
...Among many other reasons for upgrading.

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bbqbrisket
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Wow,,great info thanks

Couple of further questions.
If you have the time came you provide me link to the Akenono BBK or similar?

Also, I am kind of a nut on my pads and refuse to let any other pads on than OEM Nissan/Infiniti.
If pads do go on the upgrade, will Infiniti replace pads on them when needed?

thanks again for info

Yoda's Master
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budget friendly:
topic623726.html

OEM upgrade:
Parts list:
https://docs.google.com/spreadsheets/d/ ... sp=sharing
Upgrade2:
topic628502.html

ebay is your friend for the oem upgrade.

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bbqbrisket
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Wow, the perfect info I needed. Thank you once more.

On the spread sheet, can I make an assumption that a blank (-) space next to the part number may indicate it's the same part number for both?

Yoda's Master
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bbqbrisket wrote:
Sat Aug 20, 2022 5:54 am
Wow, the perfect info I needed. Thank you once more.

On the spread sheet, can I make an assumption that a blank (-) space next to the part number may indicate it's the same part number for both?
no. that means it's not used. the black text means it's the same for both

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bbqbrisket
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I think I got it.
If there is a black number next to the green, I can reuse the black part number but If I don't have, then buy the green one.....Right?

You have opened up almost everything I need to know.
thanks again

Yoda's Master
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bbqbrisket wrote:
Sat Aug 20, 2022 10:07 am
I think I got it.
If there is a black number next to the green, I can reuse the black part number but If I don't have, then buy the green one.....Right?

You have opened up almost everything I need to know.
thanks again
black/- = not used
black/black = reuse
black/green = buy green
black/red = don't buy

good luck

btw, are you looking at doing the ss brakeline upgrade?
Last edited by Yoda's Master on Sat Aug 20, 2022 11:19 am, edited 1 time in total.

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bbqbrisket
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Thanks again


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