Competition Traction Bars - 2" diam; .5" walls; inside diam for threads?

[Big MAK]

I know 1" is the obvious answer but what is it specifically? I need to order heims and want to make sure I get the correct thread and stud size.

 

[Graphic man]

I just made 2 sets

If you have a 1/2 hole then you will need to use 5/8 joints and use a 37/64 bit, 5/8 left hand tap and right hand tap





Scott

 

[RAMICATOR]

he has a 1" hole so, it too big for 1" tap, i dont have my tap drill chart in fron of me, so i dont know what size drill size it would be, but 1" wont work. i would make a sleave and weld it in, then tap it for a 3/4" hiem joint. thats my opinion.

 

[RAMICATOR]

if you go with 3/4", the drill size you need is 21/32", you could get away with a 5/8" if need be, theres only a . 025" difference

 

[Big MAK]

Getting some specifics now...



Heims are 7/8-14 thread size.



From what I can tell; I should have a . 687 opening and tap 13/16.



I don't have the tubing yet...



Trying to decide if I should go with the DOM and order as needed to get the right size to tap or just get some solid steel 'rods'. The solid rods are not as strong as the DOM correct?



DOM is crazy $$$ around here and hard to get. But I only want to do this once!

 

[Jeff_K]

just get some of these and weld them on.

 

[Graphic man]

BIG MAK



just a question but why are you going to 2" bars?



all the kits i have seen use 1. 125" OD bar with a 1/2" ID



i used a 1. 125OD with 0. 375 ID

 

[TReed]

I used 1 3/4 with 1/2'' wall and pulling sled they flexed like crazy, I stepped up to 2 5/8'' with 1/2'' wall and no more flex.

 

[HPetrat]

BIG MAK,

If you are going to use your 2" O. D. X 1" I. D. tube, you can tap them for 1-1/8" X 7 NC without needing a tap drill (tap drill size is 63/64").

If you wish to use a fine series thread, then I would suggest using a 1-1/8" X 12 NF tap. Again, the tap drill size (1-3/64") is just over the 1" I. D. of your tube, and I would just tap the tube without tap drilling.

In either case use a good tapping fluid (such as rapid tap or joskitch) to produce the cleanest thread possible.



My 2 cents,

HP

 

[Big MAK]

I used 1 3/4 with 1/2'' wall and pulling sled they flexed like crazy, I stepped up to 2 5/8'' with 1/2'' wall and no more flex.

I don't think there's enough clearance under a 3rd gen for 2 5/8s.



I really really should have started this traction bar project 3 months ago! I had no idea it'd be such a pain to get this together.

 

[wildmanben]

I am making a set also for my 98 and wondering what size heims to get. 3/4 or 7/8? I am getting the 2" DOM with 1/2: walls. How do you go about getting 3/4 or 7/8 threads in a 1" hole? Do I need to weld a big nut on the end or use the inserts like mentioned above?