Really?With side draft "non SU's"?THe point of a daily driver is to get in it,turn the key & go.Retro-fitting non SU side drafts to a KA is diametrically opposed to this theory.
And "BZZZZZZZZZZZ"is the sound a buzzer makes.As in"WRONG".
The numbers would be down.Keep in mind that my motor was built for low end grunt.ANYTHING that helps promote low speed cylinder filling(port velocity) will help.Trade off is the motor is all done by 4500.But that's fine for me.
Here's the new FI manifold.They have the same port diamter as the L-16& 18..31mm.THe L-20B is 35mm.
Smaller manifold runners than head ports is a good thing,as long as things are relative.Unless you are going to be twisting that motor to the moon all the time,hogging the intake(manifold) ports will actually hurt performance.