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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

my custom IFS truss

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Old Aug 30, 2007 | 06:55 AM
  #1  
89red4x4yota's Avatar
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my custom IFS truss

so i was at work the other day and tripped over a piece of angle iron that was 4"x5" and was 5/16" thick....i measured it and walked it out to my truck and saw if fit perfect...not only is it strong enough to jack the truck up on but i will be mounting my belly pan and skids to it...let me know what you guys think...
pics


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Old Aug 30, 2007 | 07:00 AM
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From: Plainfield, IL
Good job! It's likely very unnecessary with material that thick and with a belly pan but if you box that in even with like .125" plate it will add a fair amount of strength to it.

Frank
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Old Aug 30, 2007 | 07:02 AM
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ewong's Avatar
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Nice...

If it were mine I would "round" out the cutout a bit - and avoid the "notches" in the corner of the cuts (tho I doubt the "stress risers" will be an issue as if that peice is stressed enough to bend/break you have other issues)
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Old Aug 30, 2007 | 07:26 AM
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Yeah, I second the corners. Corners like that are the first place cracks will form. Also, I don't see it having much strength, because of the big notch for the driveshaft. That's why people use the boxed or tube design.

But, it's better than nothing, and will surely support the skid.
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Old Aug 30, 2007 | 07:33 AM
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Looks plenty beefy to me. I wouldn't worry about it anymore.
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Old Aug 30, 2007 | 07:38 AM
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i dig it i was actually just thinking about starting to design one. (my roommate is a mechanics major and i have unlimited access to solidworks!)
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Old Aug 30, 2007 | 08:07 AM
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Does your boss know that you steal from work?
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Old Aug 30, 2007 | 09:31 AM
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Originally Posted by fastkevman
Does your boss know that you steal from work?
LoL, it's called being creative. making something out of nothing.
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Old Aug 30, 2007 | 10:03 AM
  #9  
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Anything there is better than nothing. IF the forces on those lower A-arms were so great ..enough to bend, crack or hurt that truss, then i think toyota would of engineered something there in the first place.

its fine, good job =)
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Old Aug 30, 2007 | 10:04 AM
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How much do you think that truss weighs?

Frank
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Old Aug 30, 2007 | 11:28 AM
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Looks good... especially considering the cost.

Maybe you could beef it up with some gussets like this:



Would help support the skid from impacts and probably prevent any possible cracking or bending of your truss. Seems simple enough... if you can weld. If not... then my idea is probably just overkill anyway.
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Old Aug 30, 2007 | 11:49 AM
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It's already over-kill! (its 5/16" steel angle iron for crying out loud). If he ever manages to crack that thing I will personally weld it up for free
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Old Aug 30, 2007 | 11:52 AM
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Originally Posted by mt_goat
It's already over-kill! (its 5/16" steel angle iron for crying out loud). If he ever manages to crack that thing I will personally weld it up for free
Haha true that. That corner alone has to be close to 1/2" thick. That thing isn't going anywhere.
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Old Aug 30, 2007 | 12:02 PM
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From: Phx, AZ
^^^ Party Poopers ^^^


Rocks should fear that truss and preemptively sink into the ground before you get there just to avoid the full punishment they are about to receive.
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Old Aug 30, 2007 | 12:28 PM
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schweeeeeet!
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Old Aug 30, 2007 | 12:44 PM
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thanks for the good words guys...it prolly weighs a good 15 pounds ish never really weighed it...yeah the corner of this thing is SOLID...i actually asked my boss about taking it and he said take more while your at it.....get the place cleaned up a bit...it was going in the dumpster if i didn't take it...i am working on a custom bull bar next...should a have pictures later on tonight...i incorporated another peice of this angle iron however it is only 1/4" will keep you guys posted...to tell you the truth i jacked the truck up on this truss and it didn't even bow...(i know because i put a 2 foot level up to it)
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Old Aug 30, 2007 | 12:56 PM
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I think the bolts you used for it are probably the weak point. I'd nab some Grade 8 bolts!

Other than that, looks sweet. That is a thick hunk of metal. Have any more you'd maybe like to send along? I need to make a custom one since I have a lift and the Sonoran one won't fit =/
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Old Aug 30, 2007 | 12:56 PM
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18.53 pounds
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Old Aug 30, 2007 | 01:01 PM
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sounds right...jcfb i only grabbed two of the job site and one is the 5/16th on and the other is 1/4. the shorter bolts you see are grade 8 and the others are grade 5...i will be redoing all the hardware on it and the skids when i get the skids done
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Old Aug 30, 2007 | 01:21 PM
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aviator's Avatar
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From: COTKU,Ontario,Canada
Originally Posted by fastkevman
Does your boss know that you steal from work?
It's called "scrap iron" for a reason LOL

I would have torched round edges more for asthetics than strength but it looks nice and plenty beefy... anything you do that's narly enough to crack that is probably going to write off the truck anyway so no worries...
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