Quote:
Originally Posted by Herman A
Your engine modification is really an impressive piece of engineering and nice craftsmanship.
I have two questions re the principle designs which you have choosen.
Does the distance from the intake valve seat to the throttle affect reverse flow, performance, eficciency or anything else, under the assumption that the throat of the inlet tract is situated far away from the throttle?
Why did you choose the indirect TPS+MAP way of measuring the air flow instead of using one or two MAFs for direct air mass measurement into the plenum chamber, which is already part of your design? The first method doesn't cause any pressure drop in the intake system but a properly dimensioned MAF should give neglible. Isn't it very difficult to measure the over one cycle, hugely variable pressure, which fluctuations depends on the throttle angle and rpm?
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I suspect the ITB set up is more easily constructed as opposed to MAF with single large throttle body and sheet metal intake manifold----and then there's that Helmholtz theory to deal with.....
although Mike has demonstrated fabrication of stuff is no big deal for him!!!
--Russ
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Absence of Evidence, is not Evidence of Absence.
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