Port matching cases

[satts]

Hi guys I know it's better to have your cases ported to match cylinders but if their not matched how much power could I expect to loose on a 4mm serval?

[sleeper06]

2

[satts]

2? Hp ?

[sleeper06]

Lol maybe 3 on a dyno , do I port match all my cases yes it's free hp

[RadarRacing]

You wont lose all that much , even 2 hp might be high.

To port match with a dremel or air tool and a carbide or cartridge roll use a cub base gasket and a sharpie and mark the material on the top case with the crank out and carefully remove the material. I usually try to go down most of the way to the pocket in the cases and make it both smooth and have a clean transition. You dont really want to remove any more case material than needed to match the gasket and blent the case well to the cylinder.