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Can send photo and flow #s
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Posted by SWEDISH DYNAMICS [Email] (more from SWEDISH DYNAMICS) on Thu, 10 Mar 2005 17:14:55 Share Post by Email
In Reply to: Thank you and how far can you port?, Aaron 9000T, Wed, 9 Mar 2005 23:29:21
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Aaron,
Thank you for the comments and reply!
Most of your more progressively modified cylinder heads will still keep intake and exhaust ports close to 90% of the respective valve head size. Anything larger than this will only reduce flow velocity and would substantially reduce portal flow capabilities. In keeping these 90% dimensions, flow is dramatically improved by eliminating restrictions. On a ported cylinder head, the 2.0 liter will always outflow the ported 2.1/2.3 liter casting. A major reason for this is a substantial reduction of short turn radius (sharp turn directly under valve seat). A reason for the trend towards the 2.1/2.3 liter cylinder head castings is that modifications would reduce nearly 40% of effort/work over porting the 2.0 liter counterpart. In short, Modifying the 2.1/2.3l cylinder head is a simple update and there is very little work to bring ports to relative sizing...the downside is that the short turn radius on the 2.1/2.3 causes more turbulence and a reduction in flow properties by as much as 7% at some lift points.
If you send us an Email, we can send flow #s and photos of the short turn radius of both the 2.0 and 2.1/2.3 liter cylinder heads.
There is much more information relative to valve sizing, intake manifold plenum size, etc. but we can address this another time.
Best Regards!,
GaryK at SWEDISH DYNAMICS,INC.

posted by 205.188.11...

http://swedishdynamics.saabnet.com

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