Solid or poly motor mounts?

1990LXDropTop · Nov 4, 2005

Which would be better from a street car? Solid or polyurthane motor mounts? Which are better in general?

90mustangGT · Nov 4, 2005

Well, it depends on what you like. Solid motor mounts you will feel the motor a lot more. I like it when the car shakes from the lope of a cam, and I have MM solid mounts here and my car is going to be a street car. I am going with a poly trans mount to prevent stress on the tranny case. Poly will transfer more than stockers but less than solids. Some say the convertable mounts are equivelent to the poly mounts.

65ShelbyClone · Nov 4, 2005

The convertible mounts are no different from regulars except they have a clamshell design that keeps the mount from coming apart and letting the engine hit the hood. This is just my experience, though. I would get the poly mounts personally.

1990LXDropTop · Nov 5, 2005

Which mounts would give me better throttle response? Right now if I nail it below 3000rpms in pretty much any gear except 1st, I can feel the car kind of shake and bit and the motor bogs because its retorqueing itself. I think my driver's side mount is cracked.

87gtconv · Nov 5, 2005

For street cars I vote for Poly

vristang · Nov 5, 2005

Being able to "feel" the motor is the best reason I have heard to go with solids, unless you are making enough power to justify an aftermarket block.

However, with that said I think that poly mounts are the way to go for a street car. You will feel a big difference in how the motor responds between worn stockers and fresh poly's. I have several thousand miles on the motor in my sig with poly's, and they hold up to the torque just fine.

:Word:
jason

CarFreakGT · Nov 5, 2005

Seems that most feel that poly is the way to go w/ street cars. Am I correct to assume that everyone feels the same about poly trans mounts? I'm going to be replacing my mounts in the not-too-distant future.

04sleeper · Nov 5, 2005

I would vote to go with stock vert replacement mounts. I'm not a big fan of poly on a street car.

65ShelbyClone · Nov 5, 2005

1990LXDropTop said:
Which mounts would give me better throttle response? Right now if I nail it below 3000rpms in pretty much any gear except 1st, I can feel the car kind of shake and bit and the motor bogs because its retorqueing itself. I think my driver's side mount is cracked.

If the engine bogs, you have a tuning problem. The engine mounts have little or nothing to do with throttle response. If you want to use soft mounts and still have good support, you can fabricate a torque strap. It ties the cylinder head to the frame or swaybar mount to keep it from twisting too much.

Stock replacement convertible mounts are cheap, though.

04sleeper · Nov 5, 2005

65ShelbyClone said:
If the engine bogs, you have a tuning problem. The engine mounts have little or nothing to do with throttle response. If you want to use soft mounts and still have good support, you can fabricate a torque strap. It ties the cylinder head to the frame or swaybar mount to keep it from twisting too much.

Thats what I would do just for the track. Then unhook it and enjoy the mounts for the street.

bubba-dough · Nov 5, 2005

Solid or poly? I vote poly.

Solid or poly motor mounts?

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