Thread: solid motor mounts

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what are some of the pros and cons to a solid motor mount..? thy must make your car look pretty bada$$ when idiling..

Originally posted by Stroke_this383
what are some of the pros and cons to a solid motor mount..? thy must make your car look pretty bada$$ when idiling..

it will rattle your teeth going down the read more than it will make it look bad. i wouldn't have a st. car with solid motor mounts on it. there is a con, dont know no pros.

Drives me nuts just thinking about it, better get some sort of pillow for the mounts or you might hate to start it

Solid mounts are stronger than rubber mounts, but are prone to failure when used over long periods of time. The mount and engine block mounting bosses will fatigue due to the lack of cushining for vibration as well as transmission of driveline shock to the motor. Most of the new motor mounts such as polyeurethane are very strong and will work for all street and most drag engines.

If you're going solid mounts, don't forget the tranny mount has to be solid too. Rather then solid mounts, you might want to consider a front and mid motor plate. Like the other guys said, they will shake the heck out of you and everything else on the car. If you go with plates, don't forget to use a travel limiter for fore and aft engine movement, it will lessen the breakage problem with extended use on the street or track.

I always build engine mounts using the urethane bushed rod ends that are sold to make 4-bar linkages. This keeps the engine vibration from being transferred to the chassis, but the engine is held much more solidly than with a conventional GM rubber mount.
There is absolutely no "rock and roll" of the engine in the car when it is running.

I had solid mounts on the 454 in the panel truck (600 H.P.). Not only solid but on stilts as you can see in the pic. Wanted to get a little exra weight transfer. Donno' if i did it right but I used a standard issue GM trans mount. Thinking it would absorb any frame flex so the tailshaft housing wouldn't break. I drove it like this for quite a few years / thousands of miles with no failure. Pulled a camper to many events / local and national, Went to the track a few times. And since I was in my early 20's at the time, ....... more times than not it was @ full throttle at every opporunity. It shook the truck a little, bit that's the way I liked it. Even more would have been better.
That being said, I problee' wouldn't build one like that again. (Going motor/mid plate with the one I'm building now).

with the way the newer motor mounts are made there is no reason to run a solid mount. they dont break like they used to and if it does break its not going no where, because of the way its made.

my gto is soild mounted but the tran s is not and it is no big deal i have all my filling in my teeth it has been like this for along time mid 80s. if you have a new gm with a clamshell type will keep it from moveing i have this type in my 50 and work fine if you run a soild trans mount frame flex will break the trans. soild trans mount is not needed