[DeTomaso] Example of Wilikson Header Port

gow2 at rc-tech.net gow2 at rc-tech.net
Mon Feb 27 08:50:59 EST 2012


I am making header flanged for the CHI 3V:

http://www.qualityfabparts.com/chi.html


Gary

> Here are photos of one of the header ports on Wiliksons new GTS style
> headers. The match between the cardboard pattern from one of my stock
> exhaust ports is excellent.  The only significant mismatch is where
> Wilkinson left more meat on the flange near the upper bolt hole in the
> photo
> which good because this area is prone to blowing out the gaskets.
>
> All the header's ports are near clones of each other at the head side of
> the
> flange surface.  The cylinder to cylinder port spacing is spot on (within
> 20
> mils).  The only variation between the header's ports is due to the weld
> transitions to each pipe's ID, which is somewhat smaller than the port
> openings, and the various directions that the pipes leave the ports.
> These
> headers have, by far, the most accurate port flanges I've seen between the
> 4
> different sets of 351C headers I've owned.
>
> In comparison, my Mind Train header's port spacings are off a good 150
> mils
> between the front and rear cylinders!
>
> Doug Braun
> blue 73L #5505
>
> http://www.poca.com/index.php/gallery/?g2_itemId=35137
>
> http://www.poca.com/index.php/gallery/?g2_itemId=35140
>
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