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<DIV><FONT size=2>Not sure if this is the right form, but it has to do with my
crossfire injected project. It seems that a better(more even) distribution and
better flow would result from moving the top plate/swirl plates away from
the manifold floor.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>True</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> This would also change the plenum volume.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>True</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> What part does plenum volume play in the over all
scheme of intake design?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Lots, it basically controls what rpm the engine makes peak
torque/HP. Also, makes up for flow limits in TB (to a minor
degree).</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> How will increasing it effect performance, and is
there a formula for figuring the correct volume for a certain engine
combination?</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Varies alot. Anything from one cylinders volume, to
1.5+x the engine's CID.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> I would like to base the changes on something other
than physical restraints(hood clearance etc.), without having to try a bunch
of different combos with all the tuning and testing etc involved.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>I have sone extensive porting mods to the cross fire
manifold. Making a 1/4" thick spacer for the lid made a large difference
(BTW, I'm running a 355 CID). Much better high rpm
breathing.</FONT></DIV>
<DIV><FONT size=2>Also, ground out the ERG tunnel. Opened up the outside
pockets, and cut port roofs back 1/8" also. With enough cam 2"
butterflies also help.</FONT></DIV>
<DIV><FONT size=2> BTW run it with a 1227747. I some wotk
but with the info from programming 101 makes it real sweet.</FONT></DIV>
<DIV><FONT size=2>Grumpy</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Kevin R</FONT></DIV></BLOCKQUOTE></BODY></HTML>