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qmdv · 01-13-2019, 09:23 PM

Some times when the CR gets to high it is call hopping them down. Here is an old Ed Winfield story. A kid I knew growing up had a 1/4 midget back in the late 50's. His dad knew Ed Winfield very well. I forgot what engine he had. Some sort of flathead that met size spec. Well Winfield ported and relieved it and did a cam upgrade. This kid was always winning. He got older and interested in other things so the 1/4 midget was sold. New owners kid was then a consistent winner. They tore it down and checked CR and was surprised how low it was. So the head was milled to get CR up and that ruined the breathing characteristics. Maybe call it a Tune Down. It quit winning.

01-13-2019, 09:23 PM	#2
qmdv Senior Member Join Date: Dec 2012 Location: Payette, ID Posts: 936	Re: Weiand 8.75 Heads Some times when the CR gets to high it is call hopping them down. Here is an old Ed Winfield story. A kid I knew growing up had a 1/4 midget back in the late 50's. His dad knew Ed Winfield very well. I forgot what engine he had. Some sort of flathead that met size spec. Well Winfield ported and relieved it and did a cam upgrade. This kid was always winning. He got older and interested in other things so the 1/4 midget was sold. New owners kid was then a consistent winner. They tore it down and checked CR and was surprised how low it was. So the head was milled to get CR up and that ruined the breathing characteristics. Maybe call it a Tune Down. It quit winning.