Real data. EQ standard replacement Magnum head and comparisons with oem and NZ versions.

Well, I’m going to make another “armchair head porter” comment.

For the last few steps, Charlie has bounced back and forth between .500 and .600 lift for where he’s checking his air speeds.

This is fundamentally wrong, if you’re trying to compare the results with each other........ but its really an issue with these particular heads since the peak flow happens in the .500 lift range....... and then the flow takes a big dive after that point......... and the flow is noticeably lower by .600.

So naturally, since the flow is higher at .500 lift, the speeds are also higher.

Imo, what he should have been doing there is testing the speeds at both .500 and .600 lift.