I heard that your 1/4 can change depending were you are ( something about altitute).
So if it's true, ours would be different from the guys in US. Have you guys cheq your 1/4 mile around here?
The three main tracks around here (Greenfield, Raceway Park, and Miramichi) are all at or just above sea level. I was able to run a 15.1 with an intake and exhaust so I would say it makes a difference.
Quoth the Raven 'Nevermore
55 McQuade Lake Cres,
Halifax, Nova Scotia, Canada