Seems like a good idea, but i want feedback before i fab everything tomorrow.
Plan is a 5/8 heim in a threaded tube, welded to a piece of 1.5 id tubing with poly bushings inside. Poly mounts to tabs welded to frame.
My though it that it reduces obstruction to headers, reduces flex, gives me a little adjustability uf needed.
The heim would go between a couple of tabs welded on 1/4 plate, which would be bolted to two factory bosses in the side of the block.
This seems like a genius packaging solution.
Why is it a horrible idea?
It's a solid mount and solid mounts absolutely suck.
I have Heims in teh RX-7's rear suspension and they last two days before they rattle and clatter. I would expect an engine mount's non-noisy lifespan to be much shorter.
Wouldn't the poly bushings inside of the bottom tube absorb some vibration?
Driven5
SuperDork
12/15/17 10:15 p.m.
What's the advantage to dual pivots at either end on a single motor mount? Seems counterproductive to add extra (unnecessary/undesirable) degrees of freedom to the engine mounting scheme.
Just ditch the heim and weld the tube that the heim would have been threaded into straight to the 1/4" plate bolted to the factory bosses on the side of the block. All the variability you should need is handled by the urethane bushing bolted to the frame tabs.
The Heim seems like an unnecessary failure point to me. It also seems like it would concentrate load unnecessarily. And be more expensive.
SkinnyG
SuperDork
12/15/17 11:08 p.m.
With poly on one end, it may not be an issue, but I have reservations about pivots on both ends. What's to keep it from flopping around? Can you draw a sketch?
I forgot to get you pics. I'll get them this morning.
Our mounts are .25 inch plate on the engine, .25 inch plate at the subframe with some tubing connecting them. At The subframe side, they sit on a hockey puck.
I'll get pics to you in a few mins.
I am also wondering what keeps the engine from pivoting.
I think the heim joint is added expense, and unnecessary.
My idea was that rhe trans mount would keep everything in place.
The heim idea is soundig pretty bad.
Guess its back to the drawing board for engine mounts. Ill look at the suggestion that driven5 made. May be the way to go.
Yeah, you’d need Heims in several different planes to counteract the freedom the other ones allow.
You’d have to have a Heim to eliminate each direction of movement. That’s a lot of Heims.
Rough draft without heim joints is ready for test fitting
