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Quick Jacks
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http://www.clubcobra.com/forums/era-speak-bob-putnam/121533-quick-jacks.html)
| jhand |
07-23-2013 10:25 AM |
Quick Jacks
Has anyone used them for what they are designed to do? I don't think I would trust the bolts and the way they mount to the frame, but using them would make working on the car a lot easier until the lift goes in.
Jay
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| Jim Holden |
07-23-2013 10:51 AM |
Do not use the lift jacks. While the bolts could be changed to Grade 8s, the connection to the chassis is not strong enough (IMHO) to prevent things from bending and perhaps cracking the fiberglass, etc....
Use proper jackstands under the chassis frame. It's one thing to come roaring into the pits at Riverside Raceway (circa 1964) to change tires, it's another to be lying on a gurney under a car supported only by a couple of bolts
Jim
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| Bobcat |
07-23-2013 05:20 PM |
X2 on what Jim said .
Do NOT use them as support when you`re under the car.
I have used them ( both ) to pull mine up on a rollback when they couldn`t get under the car . The difference is the bolts are in tension and you`re only fighting rolling resistance up a ramp vs a shear load . Four bolts in shear with about 2000 lbs on them ???? No way .
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| ERA2076 |
07-23-2013 05:22 PM |
Yes - on the rears - Grade 8 - bent the bolts. I did not ruin anything, but had more than ample opportunity.
Will not be trying again.
chr
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| CSX3183 |
07-23-2013 09:20 PM |
Not unless you have a death wish
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| razerwire |
07-23-2013 11:03 PM |
Have used mine but the frame has extra tubing to support. You can see the black # 98 cobra up on stands if you look up pictures SAAC 38. The spec racers and comp cars from the old finishline motorsports have the extra tubing. Like to know more about the jack stands used by the car at SAAC, homemade or purchased?
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| dcdoug |
07-24-2013 08:28 AM |
Quote:
Originally Posted by Bobcat
(Post 1254339)
X2 on what Jim said .
Do NOT use them as support when you`re under the car.
I have used them ( both ) to pull mine up on a rollback when they couldn`t get under the car.
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This is the reason to carry a 6' nylon tow strap, by the way......:cool: |
| Shootnride |
07-24-2013 08:35 AM |
I can't speek for any other manufacturers, but Superformance specifically states in their owners manual that these are not to be used to raise the car.
Ted
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| 601HP |
07-24-2013 03:17 PM |
I just use mine to bust my shins while walking around the car. Its happened more than once. I have actually dropped to the floor because of the pain. **)
David
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| jhand |
07-24-2013 03:46 PM |
I would never trust anything holding the car up with out jack stands under the car, I was just seeing if anyone used them to get the car off the ground to get the stands under the car. It seems it would be easier then jacking under the car.
And yes i have banged my legs on them more then once.
Jay
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| ERA Chas |
07-25-2013 08:05 AM |
Quote:
Originally Posted by 601HP
(Post 1254445)
I just use mine to bust my shins while walking around the car. Its happened more than once. I have actually dropped to the floor because of the pain. **)
David
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You can minimize that by reversing them-hook side toward body. Many comp cars were like that. Even in front. |
| ERA2076 |
07-25-2013 12:32 PM |
Not to hi-jak, but has anyone used a front attachment point for a tow hook. It seems the load would be in tension.
Any re-inforcement used?
x-chr
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| bwcobra15 |
07-25-2013 02:10 PM |
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| ERA2076 |
07-25-2013 02:32 PM |
Those days were just great. We tried to simulate with a piece of pipe and a jack which was incorrect because of the bending moment at the center of the pipe.
Slight bend in pipe also. :LOL:
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| ERA Chas |
07-25-2013 04:05 PM |
Quote:
Originally Posted by ERA2076
(Post 1254563)
Slight bend in pipe also. :LOL:
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Remington knew what he was doing. The contact areas are doubled with small sections of pipe to fit the hooks. Larger diameter pipe for the cross-piece. And the bend is for additional tin clearance on small nose cars.
Worked great-one guy, one yank and it's up.
***Note also, the hooks are reversed... |
| twobjshelbys |
07-25-2013 04:17 PM |
I was at the Shelby American collection and asked Dave about them. He said that they were essential on the track for speed but even then the bolt/rod would flex and deform the metal around the hole. Not a problem with aluminum but nothi g good for glass or cf. I was going to make one from theirs but decided against it
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| Bobcat |
07-26-2013 07:40 AM |
ERA 2076 , refer to my earlier post on this .... I think the 3rd one down . I`ve down it before to get the car on a rollback ( broke a valve spring ) . Just don`t do any sudden jerks or try a vertical lift :eek: .
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| ERA2076 |
07-28-2013 11:11 PM |
Quote:
Originally Posted by Bobcat
(Post 1254662)
ERA 2076 , refer to my earlier post
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oops - missed it
x-chr |
| hawk1014 |
01-15-2014 02:03 PM |
I am going to Fabricate a set of quick jacks for my Cobra FFR roadster. I am thinking of making them out of Stainless Steel. Does any one have full size pattern or a print with dimensions that they would be willing to share with me? Thanks Mike mhawk69@gmail.com |
| Rick Parker |
01-15-2014 03:46 PM |
The sheet metal area around the mounts where the bolts passed theough the lift jacks and into the frame tubes was relieved (cut out around the mounting holes) to allow for flexing of the sub structure.
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