I can tell you that my B1/KB deal we had basically no lash cold, and if it was really cold out starting it was no bueno. We had a race in Salt Lake a couple of years ago in late September and it was in the high 30's in the morning and there was no way my car was starting. We had to jerry rig a halogen worklight under the car and wrap the motor in blankets to get it warm enough in the trailer to start the car.