Quote:
Originally Posted by bert powell
If the port volume is measured without the spacer, you get to add all the spacer volume into the port. Very simple to understand. Make the rule that the port volume is measured with the spacer and I bet you wont see anymore of them.
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The spacer is just an extension of the intake runner. Just adding more volume to the intake tract does not make more power. As Jeff Niceswanger stated, you can do the same with the proper sheet metal or billet intake or even by welding a cast intake.