4130 HT or 7075 AL?

Mr. Underkill · Aug 8, 2008

Making a new tie rod and drag link for the stock mod.
opinions on both materials?

4130 1"x.250 direct thread for heims
7071 1.25 hex bored and threaded. Unless theres a better way I don't know.

B Gillespie · Aug 8, 2008

Re: 4130 or 7071?

I ran 4130 heat treated from Poly Performance on the front suspension and tie rod, with 2" 7071 or 7075 ??? rear lowers and 1.5" uppers.

The 4130 heat treated is definately stronger, and close to the same weight. I worried about the threads loosening in the alum., but I have never experienced it. The 4130 is expensive, but I dont know the cost difference between machined alum pieces and 4130 plus bungs and welding time. If you still need high strength and space is an issue, 4130. If you want some bling and you have the room, aluminum.

Mr. Underkill · Aug 8, 2008

Re: 4130 or 7071?

been leaning to the 4130.
any thought about cutting the threads in the material instead of using tube adapters?

LOSER · Aug 8, 2008

Re: 4130 or 7071?

B Gillespie said:
close to the same weight. .

1-3/4" x .188 wall 4130 tube = 3.16 lbs per ft.
1-3/4" Solid 7075 Alumimum = 2.94 lbs per ft

InDaShop · Aug 8, 2008

Re: 4130 or 7071?

I run 7075, and have smashed my front tie rod so hard Kelly kringed and threw up his arms. But it bounced right back, I swear by that stuff, it has HUGE memory!

BamaTJ · Aug 8, 2008

Re: 4130 or 7071?

Have any weights of 1.5" 7075 and 1.5"x.250 DOM?

InDaShop · Aug 8, 2008

Re: 4130 or 7071?

7075 is LIGHT!!!

Mr. Underkill · Aug 8, 2008

Re: 4130 or 7071?

Wyatt,
is that tie rod solid or hollow?

Pat

InDaShop · Aug 8, 2008

Re: 4130 or 7071?

Solid.

I run a 1.75" solid 7075 tierod

Links are solid 7075 1.75" uppers, and front lower. Rear lowers are 2"

1" Hiems all around.

After having them, and using them, I cant believe we in this sport didn't move to 7075 sooner. Its so light, super strong, and has memory, unlike most other grades of aluminum.

Mr. Underkill · Aug 8, 2008

Re: 4130 or 7071?

I'm seeing with the 1.75 and a 1" heim. You have 3/8 wall. Obviously it works well. From your ratio I could get away with 1" and a 5/8" heim. for more beef step up to 1.25. thoughts?
I have to keep my Clayton links.

Beyer · Aug 8, 2008

Re: 4130 or 7071?

I use 2" 7075 on my lower links and it takes a beating, but I did slightly bend one of my lowers the first trip out. :dunno:

But, I also bent my 2" x .375" DOM lowers before these.

Mr. Underkill · Aug 12, 2008

Re: 4130 or 7071?

OK, hex or round bar for the tie rod in 1.25" 7075?
I think the plan is 4130 for the drag link to keep it small, and 7075 for the tie rod. Using the different sizes will keep the ends on the knuckle from sharing molecules. Unless 1" 7075 will keep the threads with a 5/8" heim.

Tomtom · Aug 25, 2008

Re: 4130 or 7071?

Anyone using keenserts or heli-coils or is that 7075 hard enough to hold threads?

vanguard · Aug 25, 2008

Re: 4130 or 7071?

InDaShop said:
Rear lowers are 2"

After having them, and using them, I cant believe we in this sport didn't move to 7075 sooner. Its so light, super strong, and has memory, unlike most other grades of aluminum.

Do you think that it's lighter than 2" x 1/"4 thick DOM?

BamaTJ · Aug 25, 2008

Re: 4130 or 7071?

Yeah, it is much lighter than 2x.250 DOM. Close to 2lbs per foot

InDaShop · Aug 25, 2008

Re: 4130 or 7071?

Mr. Underkill said:
OK, hex or round bar for the tie rod in 1.25" 7075?

Round for a tierod if you expect to hit anything, round would allow something to roll under it, vs, hex has a hard edge.

Tomtom said:
Anyone using keenserts or heli-coils or is that 7075 hard enough to hold threads?

Nope just thread the 7075, its some tough snot

vanguard said:
Do you think that it's lighter than 2" x 1/"4 thick DOM?

What Matt said.

P · Aug 25, 2008

Re: 4130 or 7071?

InDaShop said:
Solid.

I run a 1.75" solid 7075 tierod

Links are solid 7075 1.75" uppers, and front lower. Rear lowers are 2"

1" Hiems all around.

After having them, and using them, I cant believe we in this sport didn't move to 7075 sooner. Its so light, super strong, and has memory, unlike most other grades of aluminum.

Justification, no one was willing to throw the type of money at rigs they are now. Not a bad thing, just getting more and more in depth and serious about the sport and that brings innovations like "price materials" and so forth.

Its cool as **** to see these comparisons real world and in use !! :afro: