Factory Five Racing Forum banner
1 - 9 of 9 Posts

·
Junior Charter Member
Joined
·
1,146 Posts
Discussion Starter · #1 ·
In the day, the teams got a bit tired of hoisting up cars with the bumper hooks and contraptions that levered the car up. For whatever reason, hydraulic jacks (like NASCAR) weren't commonly used trackside. Some recent photos posted on early Cobra's racing pictured the tubing used to do it.

Shortly thereafter, SA and others added pneumatic cylinders, plugged in trackside air, and popped the cars off the pavement for services. They had added air powered rams to lift the chassis and tires right off the pavement.

Currently, kits to do that run $800 up, and heavy sleeves are included, because these things leak down after awhile. Plus, adding onboard air doubles the cost.

Got to thinking what would be less expensive, still offer the ability to jack the car up, and feasibly work. Hmm. Electric powered would be nice, just run it off the battery. Fast isn't needed, just up. Load capacity wouldn't be that high, a 2,500 pound car, use 1,500 jacks each corner, properly mounted to the frame at appropriate points.

1,500 pound electric trailer tongue jacks.

Hey, don't go all tongue clucking what a hillbilly. :001_rolleyes: Here's the nice parts, they are relatively light weight, extend 12-18" depending. They eliminate carrying a jack, plus finding one that actually fits under the car, plus actually getting it on a good jacking point. These cars don't do that well, entirely the point of the bumper hooks. Electric jacks don't leak down, the gearing eliminates back driving and settling. And, you get to have another dash switch, plus, it jacks itself up! How cool is that?

Nobody is going to jump in and drive it off - a nice-to-have security feature. Plus, you will pwn the car show, very few do it. No problem with getting a mirror underneath, don't forget the angel hair. :) Lots easier than hauling ramps around, too.

I fully expect someone to suggest that if they went up 8 feet you could park the family car underneath? Nope. But maybe your bike and mower.

I know you're overjoyed to know your taxes and debt are going to finance this out of my pension checks. . . :evil:
 

·
Peckin' away at it
Joined
·
1,047 Posts
Interesting, but I think I will stick to my jack
 

·
Peckin' away at it
Joined
·
1,047 Posts
The ones on my bus type RV are hydraulic
 

·
Registered
Joined
·
901 Posts
The electric trailer tongue jacks idea is interesting but I can foresee some issues unless you have some sort of closed loop system to sync each jack with each other. All the jacks would need to start the same distance from the ground or else the car would start jacking at the lowest jack first and the car wouldn’t lift straight up. The weight on each jack would need to be the same because the speed of the jack motor will very with load and the car wouldn’t lift straight up. So you would need to manually control each jack or make a closed loop system to ensure the car would lift straight up. I did a quick check of the price of trailer tongue jacks and a set of 4 would be around $700 which is not much lower than the jacks made for the job. These are my firs thoughts and there maybe other issues but interesting idea.

Bill Lomenick
 

·
Senior Charter Member
Joined
·
2,408 Posts
hey...is that how the Mach 5 jumps?

cool!
 

·
Junior Charter Member
Joined
·
1,146 Posts
Discussion Starter · #9 ·
Thanks, Bill. Feedback appreciated.

Jacks can be found for $99 - you do get what you pay for - $400 the set, with motors. Air jacks require air, cheapest thing there would be an A/C compressor conversion, which isn't rated for volume. The offroaders remark it's just ok as it takes time.

Coordinated lifting isn't done anyway with air jacks, and we floor jack a car one corner or end at a time. Mount them so they are equidistant from the ground. Weight distribution on these cars is a lot closer to 50/50 than a donor. What may be more pertinent is mounting location. One on each corner of the front suspension tower, one each corner of the IRS cage is a possibility.

I'm not seeing a major deal breaker yet, if I ignore the expense. It's our toy car, so we can indulge. There are those who install A/C in their roadsters.

Ok, safety interlock of some kind, can't have them accidentally activated. Some sort of feedback when they are extended to kill the power. A cable operated external control like a winch would be helpful, to watch under the car on less than good surfaces. No dolly wheels, but ya know, in the garage it would be nice. Some of these come with a universal clip, you choose the style landing gear. Use them with all the due consideration of a floor jack, no hills, etc.

Likely, one of youse guys will do it before I can even scrape up the down payment on the kit. Post pics of the angel hair and mirror at the car show.
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top