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> Get bent, Building a better mousetrap
mitchntx
post Nov 25 2008, 07:03 PM
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IN an effort to lose weight off the race car, I want to cut the SFCs off. However, I use them to jack up the car.

After seeing several "pro" teams use a receiver/stab setup off the roll cage, I began fabricating this kind of rig.

I used 1" square tubing as the receiver and gusseted the hell out of it to keep deflection to a minimum. I have some 3/4" solid bar stock I was using as the stab.

After welding the receiver portion to the cage and mocking up the stab with plenty of gussets, I tested the rig and ... it bent. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/mad.gif) 3/4" solid bar stock bent like a pretzel.

And it yielded right at the end of the gusseting. Think of it as a pry bar.

I opened the door and placed the jack on the end of the receiver and lifted the car without an issue ...

So help me out here ... what can I do to the bar stock I have to increase it's strength or what kind of 3/4" bar stock can I source that will lift 1500lbs?
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JKnight
post Nov 26 2008, 12:42 AM
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Can't find a pic at the moment, but JR Smith on his AIX Camaro had part of the roll cage that came down through the rocker panel that he could use to jack the car. I've always thought that would be a nice thing to have - although jacking the wife's car via the subframe connectors is quite simple.

The jacking plate for BMW factory jack points shown above doesn't work terrible well on my BMW (quiet Randy!) as I can't get my jack and a jackstand to be in that same area simultaneously, and the factory jack point has been known to be not the strongest point.

Jason
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Posts in this topic
mitchntx   Get bent   Nov 25 2008, 07:03 PM
FBody383   QUOTE (mitchntx)So help me out here ... what can I...   Nov 25 2008, 07:51 PM
StanIROCZ   QUOTE (mitchntx @ Nov 25 2008, 02:03 PM) ...   Nov 25 2008, 07:53 PM
mitchntx   The stab ... The stab fully inserted. Afte...   Nov 25 2008, 08:13 PM
StanIROCZ   I assumed a 6" lever arm and 1600 lbs of load...   Nov 25 2008, 08:34 PM
StanIROCZ   QUOTE (StanIROCZ @ Nov 25 2008, 03:34 PM)...   Nov 25 2008, 08:36 PM
RichardP   QUOTE (mitchntx @ Nov 25 2008, 02:13 PM) ...   Nov 25 2008, 09:13 PM
mitchntx   QUOTE (RichardP @ Nov 25 2008, 03:13 PM) ...   Nov 26 2008, 12:42 AM
StanIROCZ   QUOTE (RichardP @ Nov 25 2008, 04:13 PM) ...   Nov 26 2008, 02:15 AM
mitchntx   QUOTE (StanIROCZ @ Nov 25 2008, 08:15 PM)...   Nov 26 2008, 02:57 AM
mitchntx   Thanks, Stan .... Learning by doing, I guess ... g...   Nov 25 2008, 08:36 PM
rmackintosh   I used small trailer hitch recievers and made a st...   Nov 25 2008, 09:23 PM
rmackintosh   Here is the stab. As stated it is a small sized ...   Nov 25 2008, 09:40 PM
JKnight   Can't find a pic at the moment, but JR Smith o...   Nov 26 2008, 12:42 AM
rmackintosh   Not THAT much heavier. Granted it is much thicke...   Nov 26 2008, 01:41 AM
StanIROCZ   QUOTE (rmackintosh @ Nov 25 2008, 08:41 P...   Nov 26 2008, 02:26 AM
rmackintosh   QUOTE (StanIROCZ @ Nov 25 2008, 09:26 PM)...   Nov 26 2008, 03:17 AM
StanIROCZ   QUOTE (rmackintosh @ Nov 25 2008, 10:17 P...   Nov 26 2008, 03:31 AM
rmackintosh   QUOTE (StanIROCZ @ Nov 25 2008, 10:31 PM)...   Nov 26 2008, 04:11 AM
nape   You can accomplish the same thing with about 8...   Nov 26 2008, 02:54 AM
Blainefab   I fabbed jack points for the C4 I built for Dr Gin...   Nov 26 2008, 12:53 PM
rmackintosh   QUOTE (Blainefab @ Nov 26 2008, 07:53 AM)...   Nov 26 2008, 05:23 PM
00 Trans Ram   Well, my solution isn't nearly as cool looking...   Nov 26 2008, 06:57 PM
billy_ocean   wow, what do you guys think about these little pin...   Dec 9 2008, 04:58 AM
StanIROCZ   QUOTE (billy_ocean @ Dec 8 2008, 11:58 PM...   Jan 7 2009, 12:35 PM
trackbird   You wouldn't catch me under that car sitting o...   Dec 9 2008, 05:04 AM
CMC #37   QUOTE (trackbird @ Dec 9 2008, 12:04 AM) ...   Dec 9 2008, 05:40 AM

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