Yes right now I am running Porterfield's. Originally I had the Carbotech Panther+ , but with the OEM on the front, this created balance. I am not sure the differed between Porterfield and the carbotech will be enough to restore balance, but I will try it if there is nothing left. I hope the sport pads' size are not the issue. One would thing the larger diameter of the rear rotors would more than make up for any frictional differences due to pad size.
I too am thinking of going back to stock rotors ">) CB ----- Original Message ----- From: Steven Krause To: 'Charlie B' ; [email protected] Sent: Monday, March 17, 2008 1:58 AM Subject: RE: Sport Brake Problems i had a similar problem. are you using the same pads all around? i used a little higher friction pad in the rear vs the front. helped a lot. i had to relearn how to modulate the brakes. it's a lot better now and i am very happy with them. ------------------------------------------------------------------------------ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charlie B Sent: Sunday, March 16, 2008 8:23 PM To: [email protected] Subject: Sport Brake Problems I hope somebody knows what is causing an ongoing brake problem on my 90 turbo car (Stiff spec Miata suspension, slightly less spring) It all started when I installed 12" Front sport brake set and new calipers (OEM pads) ....... with stock small 90' rear rotors(Carbotech Panther+ pads).. **The braking was unbelievably good, no other changes from stock.** The next week I installed the 12.5 inch sport rear rotors fitted with same stock small 90 rear calipers OEM sport pads. **Instant crappy balance (locks front) increased stopping distance, can't lock the rear even in the rain.** Stuff I changed to improve. 1) I installed 2001 sport brake rear calipers (which pistons' have a larger diameter) Minor improvement. 2) Installed adjustable proportioning valve (minor improvement) not nearly enough. 3) Turned all rotors and installed Porterfield R4? (sport streetable pads) no balance change there 4) Removed adjustable purporting valve and replaced with a straight pipe (no change) The pedal is high and tight and does not feel like it is hitting the second system, front wheel hubs are new and tight. I am running Kuhmo Victoracers, and I can lock the front at will, from cold, especially the RF. Careful modulation improves stopping distance somewhat, but it just ain't right.. Before I replace the master, Has anybody had a similar problem?? there is nothing else to replace, the older rear flexible lines appear to be in good condition. What is the difference in the 02' master and will it fit?? Any help appreciated. Regards Charles
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