4 or 6

[2speed]

Timing is good as far as anyone can tell.


I will remove the restriction and see if there's any difference, although I won't be able to test the real world where I am now.


All those who say that 2 blades is good enough, have you pulled 7%+ grades in 100 degree heat starting out at 7,000 ft altitude? Crawling along below 15 mph. The Tulsa Oklahoma A's test shows that a 4 blade fan pulls 130% more air.