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nkaminar · 01-24-2021, 10:50 AM

It took me a couple weeks before I could test the dynamic dampener as I has some other issues with the car and had to wait for parts.

Before the dampener I had a torsional vibration issue at about 2,400 rpm. Since installing the dampener I have run the engine up to 3,000 rpm with no torsional vibration issues. I feel that this was a good investment for my engine. It runs nice a smooth now. I have a counterbalanced crankshaft and insert bearings with a high volume oil pump.

If you are running a stock Model A at 45 to 50 mph, you may not feel the need for a dynamic dampener. If you are running a higher performance engine and drive at 60 or so you will definitely want a dynamic dampener. Even the stock engine could benefit from one as the crankshaft has torsional vibration at all engine speeds, even if you don’t feel the vibration. Although stock engines have run for 90 years without a dampener so the choice is yours. The major drawback is the difficulty in changing the fan belt.

01-24-2021, 10:50 AM	#37
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 3,903	Re: Dynamic dampening front pulley It took me a couple weeks before I could test the dynamic dampener as I has some other issues with the car and had to wait for parts. Before the dampener I had a torsional vibration issue at about 2,400 rpm. Since installing the dampener I have run the engine up to 3,000 rpm with no torsional vibration issues. I feel that this was a good investment for my engine. It runs nice a smooth now. I have a counterbalanced crankshaft and insert bearings with a high volume oil pump. If you are running a stock Model A at 45 to 50 mph, you may not feel the need for a dynamic dampener. If you are running a higher performance engine and drive at 60 or so you will definitely want a dynamic dampener. Even the stock engine could benefit from one as the crankshaft has torsional vibration at all engine speeds, even if you don’t feel the vibration. Although stock engines have run for 90 years without a dampener so the choice is yours. The major drawback is the difficulty in changing the fan belt. __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.