My home inspection of Speedmaster heads

yellow rose said

Yup. A dull burr can save your buttocks. Been there many times. That's why I almost never get rid of a burr. I've had them go full helicopter on me. I just shorten the shank and tell everyone I customs made that for a special use!!!

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The helicopter deal is familiar!, I have a couple bits like that. Dull ferrous bits for everything including aluminum (with some cutting oil or wd40 etc.) and a makita electric grinder full speed all the time-I just lighten the pressure I am putting down on some spots. It takes some time to get used to running an electric wide open and not screw up **** lol (especially controlling the chatter) but for me it's faster and has a better port finish and just works.

As you know I have not ported even close to as many sets as you and some of the other guys have but I have done more than enough to realize it sucks and am not eager to do any more $300 dollar port jobs out of the garage anymore. My best set was a set of amc edelbrock heads and they gave some really good gains with minimal effort plus I dig the amc 360/401 stuff.