The headwork I am doing is not that radical. Just shortening and smoothing around the guides. Also, making the back of the port, at the intake valve is 90 degrees to shoot the intake directly at the edge of the valve. On the exhaust I am sutting down the guide and polishing the top of the port. I will measure the id of the ports and let you know what size they are.
The flow numbers on the stock TPV heads is not that great. Intake was 170fpm at 11.0mm and exhaust was 137fpm at 10.5mm lift. Both numbers were taken at 72 degrees F and 28 pounds test pressure. These numbers are what stock Chevy 350ci heads flow.
John Mead
The flow numbers on the stock TPV heads is not that great. Intake was 170fpm at 11.0mm and exhaust was 137fpm at 10.5mm lift. Both numbers were taken at 72 degrees F and 28 pounds test pressure. These numbers are what stock Chevy 350ci heads flow.
John Mead