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Author Topic:   to jig or not to jig????
thebomb
Dirt Maniac

Total posts: 149
posted December 02, 2004 07:32 PM  
how crutial is it to build a metric on a jig, allways ran camaros and never used a jig... seem to be fine,,,, thanx for any info

stockcar5
Dirt Forum Champ
Total posts: 578
posted December 02, 2004 08:42 PM  
have you ever lifted a metric frame and seen how much it can twist?
if you have that will tell you why you need a jig!

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www.geocities.com/dirtstockcar5

340duster
Dirt Maniac

Total posts: 195
posted December 05, 2004 10:42 PM  
We are in the process of building a new car and I decided to build a jig. It was a good decision. The new car will be guaranteed straight. It gives easy reference points to measure from during the build. As well if I wreck it we can put it back on and see what is bent.

thebomb
Dirt Maniac

Total posts: 149
posted December 06, 2004 02:26 AM  
ok i think ill go ahead and build one, might as well do it right, right??? whats the best material i was thinking I beam,,, but what size, also so whats the best way to mount the frame onto the jig when the jig is done,

340duster
Dirt Maniac

Total posts: 195
posted December 06, 2004 09:47 AM  
I built mine from very heavy wall c-channel (4" x 1/2" thick) only because I bought it cheap from our boneyard at work. I (and c-channel) beam is good in the vertical direction but can be twisted easily. If you can get the I beam cheap I would use it. Just make sure the jig is levelled before using. If I had to buy the material I would use square tubing (minimum 3x3).

To attach the frame to the jig you can either clamp or tack weld it (or both)

racenmotorsports
Dirt Maniac

Total posts: 169
posted December 06, 2004 05:59 PM  
how do you go about building a jig?

boas51
Dirt Maniac

Total posts: 190
posted December 06, 2004 07:51 PM  
there is a jig under here somewhere.

boas51
Dirt Maniac

Total posts: 190
posted December 06, 2004 08:04 PM  


 
sorry, attachment didnt work.
also i have built several metric street stocks without a jig, no problem make sure the frame is square and level, and tack every thing together, including all the triangulation, and alternate welding from side to side front to back.

andykmod
Dirt Freak

Total posts: 351
posted December 07, 2004 02:52 PM  
Saw horses and wood 2x4's (my dads type of jig)

BEL67RACER
Dirt Roller

Total posts: 10
posted December 07, 2004 06:03 PM  
I resently built a car on a homemade jig, it was a copy of a uni-jig, I think you can search and find them. A jig is basicly to beams that run the legth of the frame conected together perfectly sqare and paralell in all ways. We made attachment points through the four lower control arm bolt holes and upper and lower rear control arm holes. More attachment points can be made if needed. Hope this is some help on understanding the jig and hook-up

thebomb
Dirt Maniac

Total posts: 149
posted December 08, 2004 12:06 AM  
hey thanx guys i really appreciate all the help, keep coming with more replys if you think of something

sideways
Dirt Forum Champ
Total posts: 715
posted December 08, 2004 09:16 AM  
This was our thought,building a jig,mobile and strong enuff to straiten out a chassis(big I beam)hide away wheels etc.The uni jig is a fine looking unit I think.

thebomb
Dirt Maniac

Total posts: 149
posted December 10, 2004 12:40 PM  
hey guys i got a heck of a price on some 4" Ibeam, however i forgot to ask about thinkness, this should work right?

340duster
Dirt Maniac

Total posts: 195
posted December 10, 2004 02:42 PM  
4" I beam will be especially if it is cheap!

thebomb
Dirt Maniac

Total posts: 149
posted December 15, 2004 11:15 AM  
k guys got all my material any secrets before i start welding it all together????

340duster
Dirt Maniac

Total posts: 195
posted December 17, 2004 01:23 PM  
There is a hole in the bottom of the front crossmember, I think it is 3/4". Th front edge of the hole is the front "axle" centerline (wheelbase). Place a jig cross member under this with a 3/4" (check size) bolt sticking up through your steel. WHen you put you chassis on the jig this will be the locating point. Then measure back 108" from the front edge of the bolt and put another cross member - this will be your rear axle centerline.

thebomb
Dirt Maniac

Total posts: 149
posted December 18, 2004 02:05 AM  
hey thanx 340duster ill do that

DEEDDUDE
Dirt Maniac

Total posts: 157
posted December 18, 2004 06:43 AM  
bomb make sure you drop the beam that holds the 3/4" bolt down about 1/2" or more. the front cross member sets lower than the frame rails.

thebomb
Dirt Maniac

Total posts: 149
posted December 18, 2004 09:16 AM  
DEEDDUDE
thanx i was wondering about that, you all have beeen very helpful and i appreciate it guys

    

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