What material are people using for there engine mounts. Mine seams to be to soft as when the engine is under load is moves a bit to much

What engine ? car or bike

Land Rover type mounts seem to be the most popular.

Volvo 122 mounts similar to the Rover, I have used them in my Datsun 1200 sedan race car and the Toyota GTS powered Locost.

HEAVY DUTY RUBBER ENGINE MOUNT - 35mm

http://www.rallydesign.co.uk/product_info.php?cPath=609_881_884&products_id=7218&osCsid=n51ro512pjc7rgsipok9n6dua3