snailmont5oh
02-11-2010, 04:31 PM
If this question has been asked and answered, you have my sincere apologies.
I have a problem. Here's the long version.
I have a '79 Fairmont, 2-door sedan that came factory with a 302 and a 4-speed. I'm not currently using it, but that's where the story starts. The motor mounts let the engine sit so low in the car that the oil pan rubbed the steering rack, and the Hooker Super Competition (equal length shorty) headers hit the steering shaft. I thought they were worn out, so I replaced them. Same deal. I drove it that way until the day that the assist cylinder ruptured on the autocross course. Imagine the excitement involved with losing steering boost at exactly the same moment that the rear tires get oiled. Fun stuff. So, I bought a pair of Prothane poly mounts. They raised the engine about 1 1/2 inches or so. Since then, I've had a vibration.
Also since then, I broke the frame on the '79, which made me notice how much it needs a full restoration (read: piece of shit). I took it off the road, and was lucky enough to find an '80 boxtop 'Mont that is freakin' pristine underneath. So, I took all of the good stuff (engine, trans, rear, suspension) out of the '79 and put it in the '80. A friend offered me the K-member from a '90 5.0, so I installed it to get a better caster angle.
Well, my driveline vibration is freakin' horrible now. I started looking into stuff, and I found that my transmission and my pinion shaft both point at the ground. Not good. I know that I need to work with the pinion angle some, but I would like to lower my engine about and inch and a quarter, to a) help with the vibration; and, b)get the engine weight just a little lower in the car for better handling. I know, it ain't that much, but every little bit helps, right?
So, the question is this: Does anyone know of a poly motor mount that will lower the engine somewhere between an inch and an inch and a quarter? If not poly, how 'bout solid? Do I have to make them? Any other thoughts on the subject?
Thanks for the help.
Later,
Mike.
I have a problem. Here's the long version.
I have a '79 Fairmont, 2-door sedan that came factory with a 302 and a 4-speed. I'm not currently using it, but that's where the story starts. The motor mounts let the engine sit so low in the car that the oil pan rubbed the steering rack, and the Hooker Super Competition (equal length shorty) headers hit the steering shaft. I thought they were worn out, so I replaced them. Same deal. I drove it that way until the day that the assist cylinder ruptured on the autocross course. Imagine the excitement involved with losing steering boost at exactly the same moment that the rear tires get oiled. Fun stuff. So, I bought a pair of Prothane poly mounts. They raised the engine about 1 1/2 inches or so. Since then, I've had a vibration.
Also since then, I broke the frame on the '79, which made me notice how much it needs a full restoration (read: piece of shit). I took it off the road, and was lucky enough to find an '80 boxtop 'Mont that is freakin' pristine underneath. So, I took all of the good stuff (engine, trans, rear, suspension) out of the '79 and put it in the '80. A friend offered me the K-member from a '90 5.0, so I installed it to get a better caster angle.
Well, my driveline vibration is freakin' horrible now. I started looking into stuff, and I found that my transmission and my pinion shaft both point at the ground. Not good. I know that I need to work with the pinion angle some, but I would like to lower my engine about and inch and a quarter, to a) help with the vibration; and, b)get the engine weight just a little lower in the car for better handling. I know, it ain't that much, but every little bit helps, right?
So, the question is this: Does anyone know of a poly motor mount that will lower the engine somewhere between an inch and an inch and a quarter? If not poly, how 'bout solid? Do I have to make them? Any other thoughts on the subject?
Thanks for the help.
Later,
Mike.