Thicker motor mounts???

[SCOBRAC]

Hi all. I have a situation in which I need a couple degrees of pinion angle taken up. It looks like my toploader is about 0 and the salisbury is +3 (going up).

I could lower the back of the tranny or I could raise the engine slightly. I am hoping to kill two birds with one stone actually. I have seen thick (really thick) polyeurathane looking motor mounts in some of the photo gallery pictures over the years and am hoping an extra 1/4-3/8 in fron will get me a couple degrees in back while giving me a more stable platform for my 427.

I am using standard rubber 2240 /2241 style mounts from NAPA auto parts currently.

Thanks in Advance,

[Michael C Henry]

You want the U joint to move a little, to spread out the wear pattern.If they do not move they will wear a pattern in the joint and caps.and it moves the lube around.
My motor mounts were old and sagged .They had to be shimmed them up with alluminum shimms to get clearence for oilpan to cross frame. 62 Gallaxy

[SCOBRAC]

I could easily throw in a .250 shim into the frame mount. I have the space under the 7/16" stud. I'm also getting tons of shake with the rubber mounts. Idle is rock solid at 800 and mixture is right. It just seems like 11:1 is overwelming the stock mounts. And with the pinion angle problem ( see my thread in shop talk ) I think a thicker, stiffer mount will help.

Thanks,

[era565]

it is very easy to make solid motor mounts of any thickness, and this will not add any vibration to the car, but some frame strength, and quick response.

[SCOBRAC]

Hmmm... Back when I crewed for a V-mar offroad or RPC Racing and I had a supply of flat stock aluminum, heliarc, plasma cutter, end mill and a shop full of tools I would agree.

I tend to look at beer bottle caps with some trepidation these days.

Solid mounts or eurathane I'm not picky. I'm just looking to pick up say 3/8-1/2" of added height without resorting to something unsightly.

[SCOBRAC]

It seems motor mounts are motor mounts. None seem to exist. I ended up looking rearward, specifically at the tranny mount which was standard toploader fare. Two bolts in a rubber matrix wrapped in steel.

I ended up gutting the oem ford transmission mount and reducing the height by about half, welding it to a .250" piece of steel plate, bolting the plate onto the transimssion mounting platform and thereby creating a net loss of about 1/2" in transmission elevation at the output shaft.

I haven't calculated the net degree change but the tailsaft face and the salisbury now seem to be at about the same (opposing) angles creating the proper phasing between the u joints.

I have had it out briefy and it is much smoother until about 3500 (where the serious power starts) and from there up to about 4500 it is somewhat rougher but not bad. I'm still under 500 miles and am not planning on taking it over 5000 rpm until I get a few thousand on the new engine, at least I can roll up some miles now without worrying about the driveline vibration. As far as the new mount transmitting more engine vibe I guess this was to be expected going from a rubber mount to a solid mount.

Either way all the off / light throttle vibrations are gone.

[decooney]

era565,
Do you have solid engine mounts in your car?

I need to do something, my motor torques hard enough to rap the top of the pipes on the body on the left side of the car. I did some searching for poly/solid, and only found poly from a company that went out of business. So now I'm down to making some solid mounts... I want to know, how much more do you feel it shakes your ERA or other cars you may be aware of that have solid mounts?. What about cars with radical cams?

[Jack Zupan]

Michael,

Don't know if you are aware of the company this site but they are supposed to have polyurethane mounts for the FE motor. I haven't talked to them myself but I know someone who used a set a few years ago and liked them. He did say they raised the engine slightly which caused a driveline vibration.

http://www.totalcontrolproducts.com/motormounts.html

Jack Z.

[decooney]

Hey Jack,
speaking of these... Terry/TC has not been operating for a while...going through some unfortunate issues..., but hopefully the new owner/operator will continue these type products. I live right near TC and the (hopefully) new operators location. I wondered if anyone here had tried these from TC yet. Good to know...

Does anyone know if there are different quality grade rubber mounts from the various suppliers; meaning one might be more heavy-duty (better rubber) than another brand?

[SCOBRAC]

Energy Suspensions in LA has Poly Eurethane mounts for most every application.

http://www.energysuspension.com/

[SCOBRAC]

I am going to go with a poly motor mount that will hopefully smooth out some of the increased "feel" I'm getting through the chassis from making the transmount solid. It may not work but poly mounts are a good idea either way with the HP these things make.

Thanks,