z31maniac wrote: With the car running (not moving), if you put FIRM pressure on the brake pedal, does it slowly start to sink further? My thoughts are it needs a rebleed or the master cylinder is one its way out.
Master Cylinder is solid, pedal doesnt budge. Its been rebled a couple of times, with a power bleeder. Pedal is firm when you engage, but it just doesn't care about stopping.
I could quite easily lock up the brakes on my 1.6 Miata. Stock hardware all around and stock pads. Never changed anything for autocrossing. I did have to replace all the calipers with remanufactured ones over the time I had the car.
I agree with Cone_Junkie and rcutclif, you need to diagnose what's the problem with the brakes first, then worry about sensible upgrades.
Is it possible for the calipers to be on the wrong sides?
A BMW came in to my shop with recently painted calipers and we had trouble bleeding the system (with a pressure bleeder). Luckily the tech finally caught that the rear calipers were swapped and the bleeders were facing down. It was impossible to properly bleed with them that way.
lnlogauge wrote:z31maniac wrote: With the car running (not moving), if you put FIRM pressure on the brake pedal, does it slowly start to sink further? My thoughts are it needs a rebleed or the master cylinder is one its way out.Master Cylinder is solid, pedal doesnt budge. Its been rebled a couple of times, with a power bleeder. Pedal is firm when you engage, but it just doesn't care about stopping.
Bleed it the old fashioned way. I've never, ever had luck with a power bleeder (and I've tried multiple times).
The old fashioned way is a bit of a PITA, but it's always worked better for me than the other methods.
This sounds a lot like seized sliders, I had a similar problem recently from assuming that my mechanic at least checked the sliders when doing a caliper rebuild...
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