Quote Originally Posted by More Power View Post
Where a 21:1 6.2/6.5 will start normally down to +20 degrees F with 8 seconds of glow, an 18:1 needs 15 or a few more seconds of glow to start more or less normally. Your engine block heater is your friend. With an hour or two of block heat, the 18:1 will start normally with 10-12 seconds of glow time down to about as low a temp as required (lower 48).

Jim
How did you increase your glow time? Did you buy an adjustable glow controller relay?