Dual Throttle Bodies? *no 56k*
02-11-2004, 09:22 AM
#12
1.0 BAR
Join Date: May 2003
Posts: 326
Re:Dual Throttle Bodies? *no 56k*
The intakes job is to get the most filling while the valves are open. In order to get even more filling then just a straight pipe into the cylinder like that the use a manifold that is tuned to the legnth and X-secional area to what rpm you want that extra filling. When the valve closes air that was moving into the cylinder builds up behind the closed valve and makes a pressure wave that is reflected back up the intake runner, hits the back of that plenum and then travels back down and arives when the valve opens again. On a system like this they choose to get the advantage of low restriction to the advantage of the resedence effect. This should work like ITB up to but kinda suck at low RPMs.
02-11-2004, 12:49 PM
#14
3.0 BAR
Join Date: Feb 2003
Posts: 9,089
Re:Dual Throttle Bodies? *no 56k*
Originally Posted by 88b16civic
The intakes job is to get the most filling while the valves are open. In order to get even more filling then just a straight pipe into the cylinder like that the use a manifold that is tuned to the legnth and X-secional area to what rpm you want that extra filling. When the valve closes air that was moving into the cylinder builds up behind the closed valve and makes a pressure wave that is reflected back up the intake runner, hits the back of that plenum and then travels back down and arives when the valve opens again. On a system like this they choose to get the advantage of low restriction to the advantage of the resedence effect. This should work like ITB up to but kinda suck at low RPMs.
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