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Old 10-09-2018, 01:47 PM   #1
Alan.K
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Default RX7 Brake Pad Recommendation

Iíve got all my RX7 big brake parts gathered except for pads.
Does anyone have a recommendation for some performance street compound pads?
Source and part number would be much appreciated.
Cheers!
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Old 10-09-2018, 02:31 PM   #2
stick70
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I can't give you recommendations on what to buy, but I will say I've been underwhelmed with EBC greenstuffs in mine. They took forever to break in and even after they're just meh. Plus the rears are ungodly loud with all the grease and shims in them.
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Old 10-09-2018, 02:52 PM   #3
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I’m just looking for a decent street compound with good cold friction. If it can handle a little more heat than a cheapo stock pad, that’s all the extra performance I’d ask from it.
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Old 10-09-2018, 03:16 PM   #4
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Quote:
Originally Posted by Alan.K View Post
Iím just looking for a decent street compound with good cold friction. If it can handle a little more heat than a cheapo stock pad, thatís all the extra performance Iíd ask from it.
Some guy name Rod Millen is the guy that put m onto the RX7 calipers when we were admiring the nice Toyota pick-up Sumitomo calipers on the front of my Saab 900....and the RX7 ones on his GTX rally cars...

He had used the Toyota calipers on the Toyota Mickey Thompson stadium and short circuit trucks he had been in recently (then).
He said the OEM Toyota Sumitomo (cast iron) pads--the LIGHT BLUE painted ones were fantastic pads and (then) cheap!
Worked good cold and worked good hotter than hell---like dull orange color on the rotors,

And cheap! He said to use them in RX7 calipers was easy---he said just look at the steel backing plate and there was one little lug that you just kiss with a angle grinder--3 seconds he said..

Might be worth checking at a Toyota dealer--they were under $40 (then).
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Old 10-09-2018, 03:36 PM   #5
Alan.K
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Originally Posted by John V, outside agitator View Post
Some guy name Rod Millen is the guy that put m onto the RX7 calipers when we were admiring the nice Toyota pick-up Sumitomo calipers on the front of my Saab 900....and the RX7 ones on his GTX rally cars...

He had used the Toyota calipers on the Toyota Mickey Thompson stadium and short circuit trucks he had been in recently (then).
He said the OEM Toyota Sumitomo (cast iron) pads--the LIGHT BLUE painted ones were fantastic pads and (then) cheap!
Worked good cold and worked good hotter than hell---like dull orange color on the rotors,

And cheap! He said to use them in RX7 calipers was easy---he said just look at the steel backing plate and there was one little lug that you just kiss with a angle grinder--3 seconds he said..

Might be worth checking at a Toyota dealer--they were under $40 (then).
Sounds promising. Do you know what model and year Toyota pad I would be looking for?
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Old 10-09-2018, 05:15 PM   #6
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I had some Hawk HPS 5.0 and really didn't like them. They squealed a ton on light braking. I swapped to some Porterfield r4s and love them, although they do make a lot of dust.
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Old 10-09-2018, 05:17 PM   #7
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http://www.racingbeat.com/RX7-1986-1...our-Front.html

Hawk HPS and HP+ both served us well on our 24hr lemons car (240 wagon w/RX7 4-piston calipers). Worked well for endurance racing, certainly no problems with fade or modulation. Wear was fine, no complaints. Our Volvo brand pads in the stock calipers would wear about twice as fast (if not faster), so even though they were cheaper, we got slightly better performance out of the Hawk pads & Mazda calipers for similar operating costs.

It's subjective, but I felt that I could jump on the pedal hard if I needed to and didn't have to worry about lock up. Some pads get 'grabby' when hot, but these aren't very aggressive and worked great with the 200-treadwear street tires we race on. They are a street pad, afterall.

We used the HP+ first because I thought it was the more appropriate pad for racing. We then used a set of HPS when the HP+ weren't readily available when we needed them, and they did just fine. I'd opt for the HPS for a street car, since they are cheaper. The link above will give you part numbers if you want to shop around.

edit: dust, probably. noise, yep, sounded like a race car. all positives in our opinion.
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Old 10-09-2018, 05:18 PM   #8
Alan.K
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Quote:
Originally Posted by t8fanning View Post
I had some Hawk HPS 5.0 and really didn't like them. They squealed a ton on light braking. I swapped to some Porterfield r4s and love them, although they do make a lot of dust.
Do you have the part number for the Porterfields?
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Old 10-09-2018, 05:20 PM   #9
t8fanning
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No, but I got them here

https://shop.battlegarage-rs.com/pro...iant=963339145
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Old 10-09-2018, 05:25 PM   #10
Alan.K
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Thanks for the link.
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Old 10-09-2018, 05:32 PM   #11
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Quote:
Originally Posted by Alan.K View Post
Sounds promising. Do you know what model and year Toyota pad I would be looking for?
early 80s to sometime in the 90s... Check Rockauto under calipers and look at the piccies.

Look like this:


: A-1 CARDONE 19826 Caliper
TOYOTA 4RUNNER 1986-1989
TOYOTA LAND CRUISER 1976-1990
TOYOTA PICKUP 1986-1988
Please refer to catalog for application details.

https://www.rockauto.com/en/moreinfo...1277502&jsn=17

Inlet Port Size M10 x 1.0
Piston Material Steel
Color Gray
Package Contents Caliper, Hardware Kit
Bleeder Port Size M10 x 1.0
Brake Caliper Finish Unfinished
Brake Piston Count 4
Installation Hardware Included Yes
Pads Included No
Mounting Bolts Included No
Piston Size (OD) (mm) 43, 34
Piston Size (OD) (in) 1.69, 1.33
Alternate/OEM Part Number(s): 4773060021


Center to center on the mounting bolts is the ever popular 3.5".



So the pads are:

And the RX7 pads


You should note that the RX7 mod----which I invented like 16 years ago---work only if you retain the brake booster.... The piston sizes are significantly smaller than stock..36mm vs stock 38mm...none of the various guys copying the design for the adaptor brackets --which I foolishly published to allow guys to easily and cheaply do the brackets for under $10 ever mentioned the smaller size which "we"--the owner of the first car we did it on and I----eventually discarded...We had done dual-master system with a balance bar and we could not lock the fronts on loose gravel...


The Toyota pick up Sumitomos are better and closer to what we'd want, but they're cast iron and so not hip enough, even if they would work better as an UP-grade.



A MUCH better victim caliper would be Nissan 300ZX, with 4 x 40.4mm



Slightly easier to clear many wheels without that bump outboard that the RX7 have.
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Old 10-10-2018, 10:15 AM   #12
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Quote:
Originally Posted by Alan.K View Post
Do you have the part number for the Porterfields?
You can just call Porterfield or email them. If they don't have the pad in stock, they will custom make them for you. I sent them a picture of the pad for my 740 and they custom made me a set with Raybestos ST-43 compound for my Lemons car. For the race car, the pad was the size of the entire backing plate.

It might be a little overkill for the street though if you can get off the shelf pads like others recommended.

https://www.porterfield-brakes.com/
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Old 10-11-2018, 12:19 PM   #13
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I'm a big fan of EBC Yellow for hard street (also track capable) and EBC Red for a great daily upgrade.

EBC Greens are trash.
Hawk HPS were too loud and dusty for a daily IMO. Take a moment to bite when cold as well. Incredible pads, but at a severe cost for a daily.

https://www.caranddriver.com/news/pe...tuff#backfires

https://www.tirerack.com/brakes/tests/1_hawk.jsp
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Last edited by Pillow; 10-11-2018 at 12:31 PM..
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