Best home 4post lift
04-20-2014, 01:52 PM
#61
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I mocked it up ahead of time using PVC pipe so I made sure I got them the right length. Those lift adjustments seem pretty sensitive cable length that is not just so so.
I don't see any reason a stack of washers wouldn't work for just a couple of inches.
04-21-2014, 05:48 PM
#63
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So yer a name dropper too?
Everybody has an opinion but I am just reporting on what I've experienced. If you haven't experienced it, you are just left with your opinion aren't you? My opinion either has credibility with you or it doesn't. I don't care.
Everybody has an opinion but I am just reporting on what I've experienced. If you haven't experienced it, you are just left with your opinion aren't you? My opinion either has credibility with you or it doesn't. I don't care.
04-21-2014, 05:53 PM
#64
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Since it's been mentioned, what do you think does the most damage to rubbber suspension bushings? The reverse rotation of the suspended suspension or the side loading forces of the weight of the car and the reactive forces the springs put on those bushings when a car sits on all four wheels. I have an opinion based on experience. Do you? My sample size is far too small to come to a credible conclusion though.
04-21-2014, 06:02 PM
#65
Drifting
I originally wanted a two post but my ceiling was only 11' and you need 12' to have the clear floor two post. I bought a 4 post and have been able to make it work for all kinds of jobs. It is a little harder to do suspension work but with a couple of different jacks and some stretching across the rails it can be done.
04-21-2014, 06:22 PM
#66
Safety Car
Since it's been mentioned, what do you think does the most damage to rubbber suspension bushings? The reverse rotation of the suspended suspension or the side loading forces of the weight of the car and the reactive forces the springs put on those bushings when a car sits on all four wheels. I have an opinion based on experience. Do you? My sample size is far too small to come to a credible conclusion though.
I think the logic of the argument is that the bushing should not be twisted to it's far limit for extended periods of time. I think that the concern is that the bond might fail between the bushing sleeve and the rubber if left at this torsional stretch. Same logic that drives the directions included with all rubber bushings, not to torque the retaining bolts on the bushings until the car is sitting at it's ride height. This condition would have the bushing at the opposite direction of torsion.
Can't comment as to whether this argument has any validity, but it sure makes logical sense.
Regards, John McGraw
04-21-2014, 07:57 PM
#67
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Mike,
I think the logic of the argument is that the bushing should not be twisted to it's far limit for extended periods of time. I think that the concern is that the bond might fail between the bushing sleeve and the rubber if left at this torsional stretch. Same logic that drives the directions included with all rubber bushings, not to torque the retaining bolts on the bushings until the car is sitting at it's ride height. This condition would have the bushing at the opposite direction of torsion.
Can't comment as to whether this argument has any validity, but it sure makes logical sense.
Regards, John McGraw
I think the logic of the argument is that the bushing should not be twisted to it's far limit for extended periods of time. I think that the concern is that the bond might fail between the bushing sleeve and the rubber if left at this torsional stretch. Same logic that drives the directions included with all rubber bushings, not to torque the retaining bolts on the bushings until the car is sitting at it's ride height. This condition would have the bushing at the opposite direction of torsion.
Can't comment as to whether this argument has any validity, but it sure makes logical sense.
Regards, John McGraw
There are other forces exerted on those bushings than just torsional twist John. It usually shows up as an egg shaped hole through the bolt hole in the rubber bushing that holds everything together and that has nothing to do with torsion.
The first job I had as a production supervisor in an assembly plant was where the pinion angle was set and it was set with the upper suspension arm tightened in the
"ride height" position for the very reason you mention.
Somebody show me where I'm wrong and I'll go peacefully.
Last edited by MikeM; 04-21-2014 at 08:02 PM.
04-21-2014, 10:52 PM
#68
Safety Car
Thanks, I know what the logic is. I've just never seen anything that shows a negative impact on those same bushings other than somebody's opinon.
There are other forces exerted on those bushings than just torsional twist John. It usually shows up as an egg shaped hole through the bolt hole in the rubber bushing that holds everything together and that has nothing to do with torsion.
The first job I had as a production supervisor in an assembly plant was where the pinion angle was set and it was set with the upper suspension arm tightened in the
"ride height" position for the very reason you mention.
Somebody show me where I'm wrong and I'll go peacefully.
There are other forces exerted on those bushings than just torsional twist John. It usually shows up as an egg shaped hole through the bolt hole in the rubber bushing that holds everything together and that has nothing to do with torsion.
The first job I had as a production supervisor in an assembly plant was where the pinion angle was set and it was set with the upper suspension arm tightened in the
"ride height" position for the very reason you mention.
Somebody show me where I'm wrong and I'll go peacefully.
Regards, John McGraw
04-22-2014, 08:03 AM
#69
On my 63 I jacked it up when I first got it and cleaned under front end .The bottom bushing popped out .I assumed they were all bad and changed them all .This poses a good question .I installed the nea pream bushings .This time when I took it in the guy said go with the original <I remember the plastic ones squeaking .
04-22-2014, 03:00 PM
#70
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On my 63 I jacked it up when I first got it and cleaned under front end .The bottom bushing popped out .I assumed they were all bad and changed them all .This poses a good question .I installed the nea pream bushings .This time when I took it in the guy said go with the original <I remember the plastic ones squeaking .
The "poly" bushings are VERY different - they're much harder (higher durometer, like a hockey puck), and they move (rotate) within the outer sleeve and around the inner sleeve, which is why they squeak and have so much ride harshness; that's great for autocrossing, but not so much for normal street driving.
04-22-2014, 08:05 PM
#71
I think you meant to say polyurethane bushings, which are fundamentally different than OEM rubber bushings. With OEM rubber bushings, NOTHING moves relative to anything else - the outer sleeve is locked solid in the control arm, and the inner sleeve is locked solid to the shaft when the end bolts are tightened; when the control arm moves up and down, ALL torsional motion occurs within the rubber portion of the bushing, which is bonded to the inside diameter of the outer sleeve and to the outside diameter of the inner sleeve.
The "poly" bushings are VERY different - they're much harder (higher durometer, like a hockey puck), and they move (rotate) within the outer sleeve and around the inner sleeve, which is why they squeak and have so much ride harshness; that's great for autocrossing, but not so much for normal street driving.
The "poly" bushings are VERY different - they're much harder (higher durometer, like a hockey puck), and they move (rotate) within the outer sleeve and around the inner sleeve, which is why they squeak and have so much ride harshness; that's great for autocrossing, but not so much for normal street driving.
and when the guy told me to put stock in I thought maybe recall or something wrong .you don't hear much about them nowadays.
04-22-2014, 08:52 PM
#72
Burning Brakes
Well, I'm not quite that narrow-minded. Yes, I use my 4-post lift to change oil, and other maintenance, but I look at it another way. I added another stall to my garage for about $2200. I park the '60 on top and the Monte Carlo underneath. Suits me just fine.
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Last edited by 1COOL60; 04-22-2014 at 09:05 PM.
04-22-2014, 09:33 PM
#73
