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60 Imp

Posted 2014-08-16 6:02 AM (#453121)
Subject: Centre of Gravity

Location: North Australia

Has anyone a spec sheet, or maintenance instruction giving COG for our cars? Specifically looking for Imperial numbers (1960)

I am installing a 2 post hoist and the Imperial is the test weight!

Steve.

ttotired

Posted 2014-08-16 7:21 AM (#453127 - in reply to #453121)
Subject: Re: Centre of Gravity

Expert 5K+

Posts: 8443
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Location: Perth Australia

Dont think there is Steve

Its normally somewhere inline with the front seat on cars I have lifted

That Imp of yours will be like a baptism of fire for that hoist, I can hear it complaining now

VAN HELSING

Posted 2014-08-16 7:27 AM (#453128 - in reply to #453127)
Subject: Re: Centre of Gravity

Elite Veteran

Posts: 982
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Location: Upper Hunter NSW Australia

........

They're fun to install Steve, I was cheap and nasty and wanted to do mine meself.

Took myself and Dad 3 days to get mine up, made in China, rated at 4.2 tonnes , I've had a Bits-are-missing Pajero 4WD on it with no problems ( oh, and the 59 Dodge )

Have fun

.........

wizard

Posted 2014-08-16 12:03 PM (#453165 - in reply to #453121)
Subject: Re: Centre of Gravity

Board Moderator & Exner Expert 10K+

Posts: 13049
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Location: Southern Sweden - Sturkö island

The center of gravity should be approximately 59" from the center of the front wheel with a 126" wheelbase. If I'm not wrong, the Imperials have 129" wheelbase, so hypothetically the COG would be 62" from the center of the front wheel.

StillOutThere

Posted 2014-08-16 12:08 PM (#453167 - in reply to #453121)
Subject: Re: Centre of Gravity

Location: Under the X in Texas

I've never seen center of gravity specification printed for any car. Its a variable when putting a car on a lift if for no other reason than you'd have a 100 lb variation depending on whether the gas tank is empty or full and more if there is junk in the trunk, or not.

There is only so much reach of the arms of your lift. Generally speaking you want the forward arms lifting the frame close behind the front wheels because of the weight of the engine and transmission. The rear arms will reach most of the way to the front end of the rear spring hangers.

You will see mechanics using this test if they aren't positive or are just practicing safety. Raise the car two to three feet into the air. Rock the car by hand on the rear bumper. If you hear creeking or anything moves, let it down and adjust.

wizard

Posted 2014-08-16 12:53 PM (#453175 - in reply to #453121)
Subject: Re: Centre of Gravity

Board Moderator & Exner Expert 10K+

Posts: 13049
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Location: Southern Sweden - Sturkö island

Believe me, those specs are "still out there"

(Center_of_gravity_P-series (500x354).jpg)

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Center_of_gravity_P-series (500x354).jpg (91KB - 183 downloads)

60 Imp

Posted 2014-08-17 9:16 AM (#453255 - in reply to #453121)
Subject: RE: Centre of Gravity

Location: North Australia

There is a good reason you are called the 'Wizard'. Thanks Mate. This Imperial is 129 inch wheelbase, so 62" is a good starting point.

SOT, the rocking test sounds like it would be good practice with every car/lift, I will be doing that.

Mick, I might creep up on the test weight, I will start out with the tinny first, then maybe the 'Cruiser, then the Imp!

I bought a BendPak 4.2 ton 2 post overhead lift at a fire sale last year and finally got it erected, will finish it off this week hopefully. Looks like a real good lift.

I will print this COG chart for future reference. My reference folder is about 2 inches thick now, and growing!

Steve.

StillOutThere

Posted 2014-08-17 9:47 AM (#453258 - in reply to #453175)
Subject: Re: Centre of Gravity

Location: Under the X in Texas

wizard - 2014-08-16 11:53 AM Believe me, those specs are "still out there" :)

Would appreciate it if you would share the source of that diagram.

wizard

Posted 2014-08-17 10:12 AM (#453265 - in reply to #453258)
Subject: Re: Centre of Gravity

Board Moderator & Exner Expert 10K+

Posts: 13049
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Location: Southern Sweden - Sturkö island

StillOutThere - 2014-08-17 3:47 PM

wizard - 2014-08-16 11:53 AM Believe me, those specs are "still out there" :)

Would appreciate it if you would share the source of that diagram.

Sure thing, the diagrams (one of P and one for Q (Valiant) series are included in the Chrysler Corporation Training Center "1960 Valiant Unit Type Body" Developed by Chrysler corporation Service Development & Training Office October 9, 1959.

StillOutThere

Posted 2014-08-17 11:27 AM (#453274 - in reply to #453121)
Subject: Re: Centre of Gravity

Location: Under the X in Texas

Thank you.

wizard

Posted 2014-08-17 12:49 PM (#453287 - in reply to #453121)
Subject: Re: Centre of Gravity

Board Moderator & Exner Expert 10K+

Posts: 13049
5000

Location: Southern Sweden - Sturkö island

You're welcome Wayne - I'll throw in the COG for the toads as well.

The top view could be a Valiant with an open mind, but the side view really is a '59 Dodge Kingsway

Edited by wizard 2014-08-17 12:53 PM