Im using a stock RBC (50deg) vtc gear and have pined it to 40deg using tractuff vtc limiter which cost $30.

http://shop.tractuffstuff.com/TracTu...er-TT-VTCL.htm

Dont waste your money buying a toda or Hytek vtc gear.

I have also done many datalogs and i have never spiked over 40 deg.