Cylinder Head Testing - The Science Of Flow
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The ball detent locks around the valve guide and clicks into the vertical grooves cut into the stem of the P-D Valve. This keeps the P-D Valve from spinning and allows you to know precisely where the pressure tap is pointing inside the combustion chamber. The ball detent stays in place if you are grinding the head or making other adjustments, so when you return the head to the flow bench and do more testing, you can locate the P-D Valve in the very same positions as before to get accurate comparisons. View Related Article
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Audi A4 Research
Experience no-haggle car buying when searching for a new car, and research all vehicles such as the A4 Wagon. With available rebates and prices, you can find a new A4 for $31,450.00. It has had 0 vehicle recalls, which can give you an idea about its reliability. You also might want to research the Chevy Corvette and the Ford Shelby GT500.
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