power limit for 1 3/4 headers
http://www.wallaceracing.com/header_length.php
A pretty cool header calculator..I would say IMO only..not an expert
300-400 hp 1 5/8"
400-450 hp 1 3/4"
450-500 hp 1 7/8"
500-650 hp 2"
Of course what they merge into in equally important..as well as FI or NA..check out the calculator..seems to work pretty good..
A pretty cool header calculator..I would say IMO only..not an expert
300-400 hp 1 5/8"
400-450 hp 1 3/4"
450-500 hp 1 7/8"
500-650 hp 2"
Of course what they merge into in equally important..as well as FI or NA..check out the calculator..seems to work pretty good..
TECH Junkie
Joined: Dec 2005
Posts: 3,092
Likes: 11
The better question might be what exhaust velocity would be best to get the most exhaust scavenging from my headers/collectors. That is one part of the equation to get over 100%VE. There are programs that can help determine that like Larry Mieux's PipeMax.
