Reply to "CHI heads and intake"

Hey Will,

The CHI 218 ports as delivered:

w = 1.41"
h = 1.95
R1 and R2 = 5/8"
H1 = 3.36"


This information came from Dave at CHI about a year ago.

By Comparison, a 4V port is

w = 1 13/16"
h = 2 9/16
R1 and R2 = 9/16"
H1 = 3"

Of course, this all depends upon how the heads are ported, but if you are going to adapt a Hall intake to the CHI's you're in for a lot of work. You'll notice that neither the port width, or the height of the roof or floor line up. The high port version of the Hall intake would be slightly better but still a lot of work. Many believe that the old Ford high port heads are the same port height as 4V. Every one I've ever measured has H1 ~= 3 1/4".

I have a table of dimensions for various heads that correspond to the dimesional diagram below. Just haven't ever gotten around to posting it.



Hope this helps.

Kelly