I'm running a full 280zx setup with MBC and front and rear (newer) calipers with Porterfield R4-S pads front and rear. Tires are 195/60R14 Azenis RTK. Theoretically this should be a pretty rocking setup but it's seriously lacking. The plan is to add my P/U brake booster to get more oomph but I'd like to get different pads with more initial bite for my street/backroad/SoloII intentions. LOVED my Axxis Ultimates back in the day on my 350z for those who've tried.
Specifically I'm interested in any feedback for 280zx pads, unfortunately the selection is limited. Here's a list of what I found and am interested in thoughts:
- Porterfield R4-S: My current setup and frankly very disappointed. Shockingly little initial bite, they almost feel glazed even though they were properly bedded.
- Porterfield R4-1: "Developed using knowledge testing in the vintage racing community. Optimum uses for the R4-1, under conditions where very high friction is needed with minimal warm up time and in applications where there is difficulty in maintaining sufficient heat with conventional race pad compounds.". Based on the attache friction graph you can see that they should most definitely improve on the R4-S performance.
- Carbotech / G-Loc: apparently similar compounds from former workers who started their own biz (Carbotech->GLoc). I find this intriguing option and am at the point of trying to figure out if I want the R6 or R8.