engine mount experience

[400TT]

Urethane would be the best choice for your application.

I expect you have already thought about this stuff, but as some positive reinforcement:

* Use quality brand Urethane bushes.
* Use a common enough size/application Urethane that it can be replaced years down the track if required.
* Substantial enough for the application.
* Make sure the design has failsafe in case of Urethane breaking/tearing.
* Make a solid version or sold insert to replace the Urethane for when you are aligning the mounts on your chassis, you want the Urethane mounts to be unstressed.
* Be consistant in your mounting, make sure the gearbox mount is of a similiar material/movement/design.
* Make the mounting system strong enough to future power upgrades, Cobra's only get more power, a huffer etc.

For our mid-engine applications we use pair front Urethane mounts, pair Urethane mounts off the bellhousing/adaptor plate and Urethane gearbox mount. So all up 5 - 6 mounts. Enough to limit drivetrain movement to an acceptable level as it seems everyone is in the 500-800HP bracket these days or planning to be.

[Zedn]

Thanks for those points Craig.

The solid mount for mock up is a good idea that i hadnt thought of.

The bushes i am looking at are for lower control arms so should be substantial enough.

Cheers.

[Rebel1]

Excellent post Craig ... Point 5 (solid insert) for initial fab of the mount is very important. We spun up an alloy insert.

Another point I would make is ensure the side cheeks of 1/2 mount without the urethane bush is at least the same diameter as the OD of the bush.

In other words the whole urethane bush is covered at the ends.
Zedn, rather than purchase lower control arm bushes you might try whiteline for the replacement bushes for their mounts.