AidanDawn2000 wrote: ↑Fri Dec 14, 2018 2:58 pm
SLOroadster wrote: ↑Thu Dec 13, 2018 3:32 pm
If the pedal stays firm, but the car doesn't stop, its your pads. If the pedal goes soft, there is an issue with the brakes themselves.
I've defiantly got the latter. Fluid flush and new lines sound like a good starting point for me but if you happen on a good pad to upgrade to I would be interested!
Ok, it sounds like there could be a sticking caliper, or air in the system, or you are getting pad knockback. I ran into the sticking caliper issue with the #44 car I raced at Monterey this year. I ended up pulling the pads, and pumping the pedal slowly till I saw the pistons start to move. (Not the ideal way to go, but when you are in a pinch, and don't have air pressure at your disposal you get creative.) There could be air in the system, but then I'd guess you would have a soft pedal that just got softer. You might bleed the master cylinder. That might be where you have the air. If you are getting pad knock back, first off, why? One of the tell tails of knock back is that the first pump of the brakes is soft but after that they are firm. Since the rotors are fixed, knock back on a roadster is rare. (Something will have to be lose.)
Any way you look at it, there is something not right. The other possibility is that your pads are worn to the point that the pistons are bottomed out in the caliper and can't put any more pressure on the pad. (If you look in the calipers the pistons travel in a groove that will limit their travel.) This happens with about half the pad left. If you have a look and the piston appears to be extended way out, I'd bet this is actually your issue.
As for pads, as I said before, I don't have a good replacement for the KFPs. I'm super bummed they are now so expensive. EBC does make a set, someone on here tested them. I have not used them however. I'd bet they will be fine for a street use after they bed in.
Will
Sorry, I find modern engine swaps revolting. Keep your G, R, or U series in your Roadster!