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Old 09-20-2013, 08:37 PM
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Originally Posted by Hogg View Post
Is the 96-2003 Vortec 305 "520" "059" head considered a swirl head as it has the swirlk vane?

I have a pair of those, they look like a slightly smaller version of the 187.
I haven't flow those yet

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Old 09-20-2013, 09:47 PM
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Originally Posted by Cridder
The key to power is high velocity and volume, I don't think volume is an issue so how is velocity and swirl port causing a bad combination?
The following is from a thread, "Garage Ported "193"s (Flow #s)", at the Third Generation F-Body message board.

The links below (from a post by kdrolt), contains info and insight into intake port/combustion chamber-induced swirl/tumble and was written originally by Larry Widmer, one of the earlier proponents of what he calls the "soft head". Perhaps studying his work will give you a better understanding of what swirl can- and cannot- do:

I just came across these articles. They're quite old, but relevant to the discussion.

This one is recent (1999), but it refers to a review of the original work:

The Old One - Energy Dynamics : Articles - The SoftHead 1999

From 1986:

Here are the earlier articles, circa 1985:




All of these were found here:
The Old One - Energy Dynamics : This page has moved

There's a lot of other good reading starting at Endyn's main page:

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187, 305 head, swirl port, tbi, tpi

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