Quote:
Originally Posted by dtrop
I guess I never thought that the cold weather would have this much of an impact. It's literally night and day. I also didn't have the tune and header last winter.
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Napkin math says that assuming you live at sea level, and without accounting for barometric pressure changes or humidity (these have small effects), the difference between a summer temperature of about 85F and a winter temperature of about 15F is approximately equivalent to 4,850' of altitude change.
So, it's like the difference between driving your car at sea level on a standard day and driving it in Denver, CO in the rockies on a standard day. Temperature is a big deal. This is why you gotta scrutinize the conditions dyno runs are done under-- the difference between evening and mid afternoon could account for the entire difference in power between a "performance part" and a stock part.