FZJ Big Brake Upgrade on FJ

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Joined
Feb 5, 2018
Threads
73
Messages
332
Location
Salt Lake City
Hi everyone,
I finally put 16s on my 91 and have maybe 1mm left on my front brake pads, so seems like the perfect time to upgrade to the 93-97 bigger brakes. Before ordering all the stuff though, I just want to confirm I’m not doing something wrong…

I intend to order new calipers, pads, rotors from NAPA because that’s where I’ve gotten brake stuff for my 91 in the past with great luck. Right now I have NAPA’s “Premium” line of brake rotors, NAPA’s “Adaptive One” line of calipers, and Akebono ACT502 brake pads. I was planning on going with the same line of all parts for the upgrade, just for a 97 instead.

When I compare the specs of all parts between 91 and 97, the only noticeable difference is that the 91 rotors are ~286mm and the 97 rotors are ~311mm. NAPA shows the ACT502 pads as working for both 91 and 97, so no change on anything there. The calipers are the same specs but obviously different design to accommodate bigger rotor.

So will I really feel any increase in braking power/any kind of extra benefit? The pads have the same amount of contact with the rotors on a 91 and on a 97 with these parts.

Maybe I need to look at a different brand/model of brake pads, or maybe I need to look elsewhere from NAPA? What’s the secret recipe for the 91-92 big(ger) brake upgrade?

Looks like NAPA also has EBC/Brembo branded front brake rotors for the 97, the EBCs are absurdly expensive and the Brembo option looks like an OEM replacement, probably not much different from NAPA’s Premium rotor option, for like $30 more… probably just going to stick with the NAPA option?

Thanks in advance.
 
I can't recommend EBC Greenstuffs more strongly.
I’ve heard a lot of high praise about them. I will definitely look into them as an alternative to the ACT502s. Just looked and the EBC DP6992 (Green Stuff) pads are also interchangeable between 91-97, so still same size. But, I appreciate the recommendation!
 
Please forgive me for using ChatGPT, but it said the benefit from the bigger diameter rotor is that:

“brake torque = clamp force × friction coefficient × effective rotor radius”

Which, if correct (can someone smarter than me fact check?) would explain why the 93-97 brakes are a little more powerful than the 91-92…

The more I compare the Akebono with the EBC, the better the EBC is looking. Not excited about more brake dust but the performance benefits seem to outweigh that downside plenty.

At this point, all recommendations are appreciated. So many options…
 
not only is the rotor quite a bit bigger it's also thicker, check the caliper piston diameters, might also be bigger. I like advcis, Akebono, powerstop.
 
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