cbr600rx7
Well-Known Member
I have been on the phone with delta cams And want to pull the tigger on a mild re grind however we have hit a little confusion.
This has been my understanding:
Pre 88 Lima motors have a flat tapet cam with 1.5 rocker ratios.
89-94 rangers use roller rockets with 1.64 rocker ratios
95+ rangers use roller rockets with 1.86 rocker ratios.
However the rep at delta said he wasn't aware of any roller rocker ratio changes and was under the impression all rangers used the same rocker ratios. A 0.22 difference in ratio when multiplied by the cams lift can be very significant so if some one with experience and jump in here that would be great .
This has been my understanding:
Pre 88 Lima motors have a flat tapet cam with 1.5 rocker ratios.
89-94 rangers use roller rockets with 1.64 rocker ratios
95+ rangers use roller rockets with 1.86 rocker ratios.
However the rep at delta said he wasn't aware of any roller rocker ratio changes and was under the impression all rangers used the same rocker ratios. A 0.22 difference in ratio when multiplied by the cams lift can be very significant so if some one with experience and jump in here that would be great .