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Old 01-10-2008, 06:28 PM
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Motor Mounts

Anybody running solid motor mounts on a street driven car. Whats the difference if any. I am considering install of solid mounts on my 70 Chevell Convertible. 383/435 hp Automatic. Just a fun car show/ cruiser, no track.

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Last edited by sanman; 01-10-2008 at 06:29 PM. Reason: spelling
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Old 01-10-2008, 06:33 PM
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The difference is a LOT of vibrations coming through to the cab . The rubber motor mounts absorb a bunch of shaking , so unless you have a balanced and blueprinted engine in that there 'daily driver ' or you want to feel every vibration your engine makes, ( some folks like it ....) I'd stick with good rubber mounts.
But that's just me.
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Old 01-10-2008, 06:36 PM
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The new style motor mounts are alot better to run on the street.
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Old 01-10-2008, 06:46 PM
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The new urethane mounts have a steel safety lock built in so even if it lets go it is limited in travel so it can't do any damage. IMHO,I would not run solid mounts,but if you are set on it just run one on the drivers side so frame flex won't crack your block. You just don't need them especially on the passenger side unless you are going to do burn outs in reverse.
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Old 01-10-2008, 07:13 PM
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I had them in my Nova, installed by the previous owner. I kind of liked the way it felt and the way the whole car flexed when I revved the engine... but I'll be using urethane mounts when the engine goes back in. I figure it's an all-around safer move and solids just aren't necessary for my daily driver.
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Old 01-10-2008, 09:27 PM
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I have solid mounts in my Turbo 302 powered Ranger. I didn't do anything to the crank other than have it turned, but I polished the rods and took them and the pistons to work. I used a lab scale and balanced big ends, little ends, and pistons to within .05grams. It vibrates less with solid mounts than my modern daily drivers do stock.

Kevin
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