Which way would you go?

 

I went with ES motor mounts. They work GREAT. The headers aren't even close to touching the body now. (they were hitting with the old stock mounts)

 

What's the ups and downs?

 

Thats my favorite thing about the ES mounts, no more LT's into the floorboard on acceleration.


I didnt notice much, if any more, vibration from the motormounts. I have Poly motor, tranny, and tq arm mounts in my car.

I think vibration is the only downside.

 

No downs for me. My old mounts were sagging and the headers were hitting the body. They don't with the new mounts and there is no added vibration fron the new mounts. They were a bit of a pain to install, but that would be the case with any motors mounts.

 

I also assume that solid mounts will play hell with your knock sensor.

-Shannon

 

I got the prothane engine mounts from summit. I only installed the driver side. That way it doesn't vibrate to bad. It stopped my Pacesetter Y pipe from hitting the floorboard on the driver side under WOT. Its kind of a pain in the butt to get the rivets out of the stock mount to put in the urethane mount. You have to reuse the stock motor mount casing.

 

I thought poly's would cure my y-pipe bang as well. It did for only 30 miles then it went back to banging. So I switched to solids. Bang is gone period. Not to worried about the knock sensor since I don't have one. 93. Had a friend w/ solids and could notice a difference in the way the car felt. You get use to it and it was the only thing that wasn't solid on my car til now. I'm happy I switched.

 

Stock mounts unless it's a race car. Solid for a race car.

Rich

 

I've had solids on my daily driver But yes I do agree with your statement.

 

Your fillings must be in better shape than mine, or maybe "yours" are just bigger?

Rich

 

hmm, i have stock mounts. never even heard of upgrading. could you guys please explain all there is about upgrading motor mounts. my car has 135k miles on it.

97 6 speed. forged 355 236/245 cam. weekend driver.
engine is out right now..so now is the time do upgrade. what kind do i need and why? thanks, just trying to learn.
-Jason

 

By design, the stock mounts are flexible in order to absorb vibration. The downside is that with violent launches some of the torque is briefly absorbed while the mounts deform allowing the motor to twist about the crank axis. With solid mounts, there is minimal twisting and the power is instantaneously transmitted to the frame. However, besides vibrating more, solid mounts can lead to tranny or mounting point breakage. Especially if a solid tranny mount is used, twisting of the frame will place a lot of stress on the motor and tranny, potrnetially causing breakage of the tranny case or mountin points. With solids, the car will feel a little more responsive to the throttle.

Besides the vibration being unpleasant (to some) in and of itself, it will cause rattles and stuff to come loose over time. Poly mounts are an attempt at a middle ground. But my own preference is for stock mounts except on a race car. I find the addtional vibration annoying and there to be no practical benefit. If someone tells you the stock mounts aren't "strong enough" I'd point out that I have no problems with them in my near 4,000lb, >800rwhp 'vert with low 1.5sec 60' times.

Save your money and enjoy the ride with stock mounts.

Rich

 

thanks for the info.. so i will stay with my stock ones sounds like..
would it be a good idea to get new stock ones? or will my 135.000 miles ones do alright? plan on around 425 rwhp or so.

 

Not a bad time to replace them

Rich