An example of a manifold and head port that is a compramise in its original state, and most are, and what can be done to improve what is there.
This flowed a little less than 80 cfm with a 40mm Dellorto and 42mm valve as it was originally.
After adding material and changing the internal shape it flowed a little over 100 cfm, which proves bigger is not always better.
graeme
This flowed a little less than 80 cfm with a 40mm Dellorto and 42mm valve as it was originally.
After adding material and changing the internal shape it flowed a little over 100 cfm, which proves bigger is not always better.
graeme