Brake pad f/r bias
Hey guys,
Question I'm asking myself: given the stock brake force balance, does it make sense to go with lower performance brake pads in the rear? I'm looking at running something like DTC60 in the front and HP+ or DTC 30 (if I can find them) in the rear (at the track). Up till now I've run HP+ front and back and I like the resulting even brake distribution (i.e. the rear is doing the right among of work for me). So, with higher performance pads, would you recommend going with different pads, or just DTC60 all around? |
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The rear choices you listed would typically be considered too extreme of a difference. DTC-30 will come in much sooner than DTC-60 and will wear fast at those higher asphalt track temps. HT-10 would be considered more usual with DTC-60 on the front. Some might even use DTC-60 on the rear too depending on the situation, or HT14/HT10 or DTC-70/DTC-60 combinations.
There are some old threads here on the same subject ... |
ive been using the DTC-60 front HT-10 rear for a couple years now and cant wait for the rears to wear out so I can go back to DTC-60's front and rear. I get tail wiggle under extreme braking that I dont like and didnt get so much with the same compound on both ends.
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I run DTC-60 front and rear and have liked the result.
I ran HT-10 in the rear for a while with DTC-60 in the front...and really didn't notice much if any difference when I went to the 60's front and rear |
Originally Posted by bulletproof21
(Post 4603898)
I get tail wiggle under extreme braking that I dont like and didnt get so much with the same compound on both ends.
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I'm running the same compound F&R too (different brand) I prefer it over a bias
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Originally Posted by bulletproof21
(Post 4603898)
I get tail wiggle under extreme braking that I dont like and didnt get so much with the same compound on both ends.
When I have that problem, I open my hand and palm the wheel and the car tracks straight. |
I've always run the same compound front and rear. I find the car has a decent bias stock, so why over think it?
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I love my RX8. I have to change the brake pads soon and wanted to upgrade so I can use them for a solo/autocross event. What would you recommend? I have not made any changes to the car yet. Thank you for your help.
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Originally Posted by 127 T-Rx8
(Post 4604366)
I love my RX8. I have to change the brake pads soon and wanted to upgrade so I can use them for a solo/autocross event. What would you recommend? I have not made any changes to the car yet. Thank you for your help.
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I assume you have ABS still hooked up. If you do THAT is your brake bias. No need to try and out think it. Also note that brakes work in different temp ranges better. That is the only reason to change pads. Mazda already figured this out (just like most engineers) and made the rear brakes smaller. If your really using the brakes then you should get pretty good temps front to rear.
So in short you really should have the same pads front to rear, if your using a less aggressive pad on the rear your over working the fronts and not maximizing your opportunity. I have spoken directly with hawk and the dtc-60 is the way to go. If your racing and getting the temps needed to make them work. They also Lasted the entire 12hr at NJ turning 1:34-1:36 lap times on street tires. Stephen PS: I get my pads through Andrew racing. Good guy, a racer, and located down the street from hawk in Ohio. Tell him I sent you. (No he doesn't sponsor me, but he always gets what I need fast!) |
Oh and andrew racing helped create that chart above, they can give you a recommendation on what pad to use.
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Originally Posted by 127 T-Rx8
(Post 4604366)
I love my RX8. I have to change the brake pads soon and wanted to upgrade so I can use them for a solo/autocross event. What would you recommend? I have not made any changes to the car yet. Thank you for your help.
YMMV though. |
Originally Posted by sblethen
(Post 4604402)
I have spoken directly with hawk and the dtc-60 is the way to go. If your racing and getting the temps needed to make them work. They also Lasted the entire 12hr at NJ turning 1:34-1:36 lap times on street tires.
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Originally Posted by etzilon
(Post 4606194)
Very interesting, sblethen... No issues trail braking, etc? I have been using Cobalt Friction but might use some contingency buddy bucks and switch to DTC60s all around.
Stephen |
Got it. I run aftermarket discs so that should help. For NASA, discs is a free mod (calipers are not).
Thanks! |
So I couldn't find rear DTC60s in time for last weeekend, so went with DTC60 front, HT10 rear. LOVE love love the combination, the modulation response is fantastic, and speaking as a heavy trail braker, it was appreciated :P
Will try 60's in the rear when the 10's wear out, probably in a month or so. Thanks for the feedback guys. |
You go through a set of rear brake pads in one month? I must not be braking enough.
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:lol:
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Originally Posted by etzilon
(Post 4607842)
You go through a set of rear brake pads in one month? I must not be braking enough.
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Running with DSC not fully disengaged would result in faster rear pad wear, but I'd hope you wouldn't be running with it not fully turned off using those pads
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Originally Posted by Loki
(Post 4607870)
My 2 local tracks are hard on brakes: Saint-Eustache and Mont-Tremblant. Maybe I lied, the rears should last more than a month, but based on the 2 days I've done so far, I don't think they'll make it to September.
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Alright, how about I report back on this thread when the fronts and rears run out.
One thing I forgot to mention: my club requires more than 50% pad at the start of any event, so 'finished' to me comes much earlier. It's kind of annoying, but we do catch people trying to go on without a safe margin of material on the pads. Had one guy with some fancy Mercedes talking smack until we realized his OE brake pads had 1 mm left. He wasn't happy. |
That's a stupid rule for the most part...but if you have even 1/3 left they will likely pass cause it's difficult to tell how much they started with :)
It's a rule that is for people that don't do there own maintenance.....like the Mercedes guy ;) |
What can happen when you don't check your pad thickness.
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