[My5ABaby]

I would suggest OEM or Mazda comp motor mounts bought through your local dealer (unsure if they sell the comp mounts). The aftermarket motor mounts aren't as good and are not designed as well. If I recall correctly you have an N/A so there's no real reason for harder than stock mounts.

One very good thread: http://www.rx7club.com/showthread.ph...ression+mount*

Three quotes from RX7club.com

Originally Posted by digitalsolo

Yeah, to further what Ted was saying.

The bolt on those engine mounts passes straight through from the mount to the engine, creating a basically "solid" mount on tension (when the engine pulls away from the mount). They will "give" some when the motor pushes toward them, but that will likey be VERY minimal, as pulling toward one mount will typically mean pulling away from the other (not possible with the solid nature of the mounts).

The Mazda mounts embed the bolt in the actual cushioning material, meaning it can give both ways, which is going to be easier on everything from the cradle mount, to the engine mount attachment points, to the rear end (some cushioning will lessen shock loads on a launch etc).

If you want the Banzai style mounts, just remember you're really getting a basically solid mount.

In regard to the Energy Suspenion... I have them on my V8-FC, and I put some SERIOUS loads on it during acceleration and cornering, and I've been VERY happy with their performance, especially compared to ~20 year old rubber bushings. Any of the quality poly bushing sets should dramatically improve feel vs. stock rubber, and the increase in harshness is minimal with stock suspension, and the improvement in handling with an aftermarket spring/strut (or coilover) is dramatic.

HTH-

-Blake

Originally Posted by RETed

I don't know why anyone would want all that crap that is being advertised in terms of being an upgrade for engine / motor mounts.

It's just a piece of aluminum / plastic / polyurethane / etc. with a fricken bolt through it.
I've been bitching about these things ever since they became popular a few years ago.
These things work only in compression.
What happens in tension?
When the engine tries to pull against the bolt itself?
The aluminum / plastic / PU / rubber don't do jack shit when the engine tries to pull against the mount.
So what do you think happens?
You're right - the bolt BREAKS.
You're putting strain in the bolt and the metal engine bracket - something is going to fail.
Sure, these mounts are cheap, but there's a reason why they are cheap - cause they are easy to make.
Get a block of whatever - drill a hole in it - insert bolt / nut.
Viola - cheap ass engine mount.
Yes, they transmit a significant amount of vibration through the chassis cause it's going through the bolt.

I've seen one of the "popular" aftermarket engine mounts fail by the bolt breaking.

At least the stock mounts are design to handle the compression and tension forces of the engine.
These mounts actually pull a little when the engine pull against the two end studs.
This is why the stock engine mounts are best...or at least the stiffer Mazda competition ones.

I can see why race cars would go with solid mounts, but no street car should be running anything other than the Mazda units.

/RANT


-Ted

Originally Posted by RETed

I'm sorry but all those "aftermarket" engine mounts all "suck".
They only flex (if any at all) in just compression.
Under tension, they are fighting the bolt and nut!

The stock (and competition) engine mounts from Mazda are not designed this way.
The longevity of those engine mounts have not been tested yet.
Many are relatively new, and I don't think anyone has like 100,000 miles on a set yet.
Sure, they will probably never break, but I question the increased stress on engine, brackets, transmission, etc. cause the mounts just don't give under tension.

I'd recommend the competition mounts at under $50 each.


-Ted