r1_pete
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| posted on 11/6/14 at 07:12 AM |
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Plenum chamber size calcs.
Is there a formula for calculating the size of a plenum chamber, I'm thinking of making one for the jaguar, in case the ITBs don't work
out. It will be along the lines of production car designs with the 6 runners into the plenum, and a single throttle body on to and air filter.
I have googled, and found lots of references to small plenum good low end / acceleration, large plenum good top end but poor acceleration, but nothing
for a good all round chamber.
If all else fails I'll fill an XJ6 plenum I have with water and see what its volume is, but I'd like to be a little more scientific
Cheers.
Pete.
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coyoteboy
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| posted on 11/6/14 at 07:07 PM |
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Bell suggests 0.8-1.5x displacement on 3-6 cyl engines.
Given that the primary purpose of the plenum is to ensure even air delivery at the required pressure to each runner, I would work on the basis of
aiming for the 1.5 and making sure it is designed well.
[Edited on 11/6/14 by coyoteboy]
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