we have never tried anything after going to fhs lightining modified, just wonder if anybody uses cyclone heavy or hurricane heavy are they as good as lightining modified we run flats open and stock appearing?thanks
EC Birt recommended 62R for my flathead modified and that was good enough for me. Checked my ring gaps after 8 races and they were spot on from where I set them.
Kurly, 62R is a castor based oil, whereas the lightning mod. is a synthetic. The 62R which doubles as a twocycle oil has the correct viscosity for an open and the strong film strength of a castor, along with the ability of not being affected too badly by methanol getting in the bottom end. Jon