| MrDinkleman |
03-05-2019 02:50 AM |
Quote:
Originally Posted by remhex
(Post 3191721)
I'm not trolling. I got the feeling you folks just had no idea what I'm talking about. I didn't see anyone with a similar issue. If I apply light brake pressure, brakes won't respond when soaked for a few seconds. I apply more pressure they work but not nearly as responsive as warmed up dry brakes. I'm not hard enough on my brakes to crack them. I agree that drilled rotors aren't ideal for normal use, less surface area for pads to bite on. I ended up doing some more research on some other forums and using drilled rotors isn't uncommon for wet conditions. Neither is tapping them every once in a while to keep them dry. Brembo's website specifically lists use of drilled rotors for better wet weather performance. Same with porsche and some other ones. They can't all be wrong. I figured since the performance package has larger pads and rotors, that's less psi on the disk per an amount of braking compared to non pp brakes. Sorry to anyone who got offended in internet land. I'm done with this thread so don't worry bout it.
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I know exactly what you're talking about. Did your research include Miata.net? My 1999 Miata does the same thing, but worse.
I've noticed the loss of braking you are talking about. It happens when driving for an uninterrupted extended period (10~20min) in heavy rain at relatively high speeds. The lack of braking feels like the first time you apply brakes that are sintered metal pads on a cold morning.
Which led to my hypothesis that what's going on is the extended exposure to the water is cooling off the rotor and pads. Also, things might be getting so cool that water is not boiling off which might be alliwing a thin film of water on the rotor to act as a lubricant. As such, i think slotted or drllied rotors would make the problem worse...
So, the solution t thought of (but never tried, see below) is to try installing a pair of brake dust shields. They should reduce the amount of water getting to the brakes.
I never tried it because I live in SoCal where we rarely get heavy rain for more than a few days... per year. Until this year. So, it never seemed worthwhile to install the shields for such a short time.
But as I said above, the loss of braking on the FRS is not as bad as it is on my NB Miata. On my Miata, I would have no brakes for about 5~10 car lengths @ 65MPH. So I got in the habit on stomping on my brakes (after checking my rear view mirrors, of course) every 15minutes or so. Also, the issue was most common with cars that had the open, thin-spoked wheels such as the factory 5-spokes or, in the case of my Miata, Volk TE37s. Another factor that leads me to believe the rotors are getting too cool in heavy rains... |
