I just bought a used pair of Toda Spec B cams from a Honda-Tech member. My question is what is the proper lobe lift for these cams? I went to the Toda website and it says 11.0mm-12.0mm-11.0mm. My machine shop measured the cams and they came out to .291-.304-.291 is this right? The measurements are in thousandths of an inch, and I was told that they convert to something like 7.39mm and 7.91mm. They have a noticeably taller and wider primary than the stock cams (like Toda), and have B stamped on the ends. I am just confused why the measurements aren't coming out to what the specs should be. They don't look re-ground to me. Your help is appreciated.

Thanks,

Matt

 

Remember, the rocker arms have a 1.5:1 ratio. So the lobe height won't be the same as actual valve lift.

 

Ahh...that would explain it. the 7.91x1.5 is around 12mm.

Thanks,

Matt