I plan to undertake manufacturing my own softmount, too. My installation of the SA 180 will also be in a Focus (ARC). What outer diameter would you recommend for the softmount so that i'll have no issues with it conflicting with the cowl?
And just to be sure, the glue on the rubber only goes on the cut edge or can it bleed under just a little? I get how it works and really appreciate you guys taking the time to post.
-D
I'm at work and not home 'til late, but I will measure and let you know. Mine
just barely has enough cowl clearance on the left side of the firewall, and it is less than 4" in diameter. So for the Focus it is somewhat critical because it has a lot of right thrust built in, some of which I had to remove. You might have a little more flexibility with the ARC, but at any rate you won't have gobs of room to play with.
P.S. [link=http://www.rcuniverse.com/forum/m_6285026/tm.htm]HERE[/link] is MTK's thread about constructing the soft mount.