Manual brake (brake booster delete)
Thought I would share this here in case anyone was interested.
After installing the Wilwood 4 pot front calipers and Carbotech xp10 pads, my brakes were very touchy. It didn't take much pedal effort to lock up a wheel and without ABS, (and a bit of help from a few co-drivers) I was getting a lot of flat spotted tires.
I decided to delete the booster assist, but the pedal was like a rock. So instead of going with a $$$ set of Tilton pedals, I made my own delete kit.
I made the plate out of aluminum
http://i164.photobucket.com/albums/u...ps2yi0j6tl.jpg
and raised the hole for the master cylinder for better pedal ratio adjustment
http://i164.photobucket.com/albums/u...ps2z88rbyw.jpg
The lower hole is the factory 4.2:1 ratio. I added 2 more for quick adjustment if I needed it later. The top is 6.5:1 and middle is 5.5:1
http://i164.photobucket.com/albums/u...psds2vj2pj.jpg
Due it the added pedal pressure I also added a poor mans master cylinder brace by welding a large nut on the strut tower brace. I found that when I reinstalled everything, due it the miata master having a 1.6" pushrods depth, I was only able to pin the rod on the pedal at the 5.5:1 hole.
http://i164.photobucket.com/albums/u...ps170c8035.jpg
http://i164.photobucket.com/albums/u...ps067c688e.jpg
after term driving for a bit, I found the pedal to still be to stiff to be able to rev match while keeping good brake pressure. So I decided to go with a smaller master cylinder bore. After browsing online, I found the 97-99 Civic non-ABS HBs came with a 13/16 master with the same bolt pattern as the miata. I did however have to bore out the center hole due to a larger bore. And make a "t" for the front brake lines since the Civic only had 2 outlets.
http://i164.photobucket.com/albums/u...psghlv8ihh.jpg
little bit tighter on the mounting bolts also
http://i164.photobucket.com/albums/u...psltjuhlji.jpg
once installed I found that since the Civic master cylinder only had a .5" pushrods depth, I could now attach the rod on the 6.5:1 pedal ratio hole
http://i164.photobucket.com/albums/u...psonnsfnxt.jpg
http://i164.photobucket.com/albums/u...psz7cnlzrs.jpg
it is still a stiffer pedal, but I think after getting used to it, the feed back and pedal travel will make threshold braking much more controllable and save a few tires along the way lol.
