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Daniel
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Welded Uprights

Post by Daniel »

Back in the GTV6.ORG days Barry posted some pics of a front upright (stub axle) that had been cut and shortened for an "upsidedown ball joint" mod.
Was there anything special to welding this - pre & post weld heat treatment ?
I have put an upright on a nuclear analyser and come up with a material called "Tool L7" - anyone know the welding procedure for this ?

I've been out of the forum loop for a while and this is my first post in the new site so I hope I've done this right.

D
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Post by hutchensgd »

Daniel,

You are correct to ask a question about this matter. I do have a question for you however:

When you had the chemistry evaluated, how many elements can the unit read? The tool steel you identified is an odd choice for such a part. If you can tell me what elements you have, and their percentages I think I can help you identify which processes you should utilize to do this process not just look good, but work well long-term.
Glenn
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Daniel
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Post by Daniel »

Glenn

The only thing this machine couldn't tell was the carbon content ie- a piece of 4140 would read as 41XX.
Tool L7 was the nearest match it could find but it did give a complete analysis. I don't have the details with me at the moment, I will post them up later on.

Thanks for your help
D
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Post by gtv11636 »

Why do you wana shorten the Uprights ? I tought they should be extended down for lower roll center, shouldnt they ? :roll:
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Daniel
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Post by Daniel »

I am lengthening mine - cut and shut 2 to make 1 longer one (per side).
Barry shortened his but then turned the ball joint upside down.
I am interested in the welding he did for this mod.

D
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Micke
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Post by Micke »

To get space inside the rim for an upside down ball joint.
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Carel
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Post by Carel »

Hi All

I think that was Julien and not Barry, but I too would like to know what the welding entails

If I may ask, why do you need to shorten the uprights? If you use a 17" wheel, I think you will be able to fit the A-arm underneath the upright if you use something like a Lada's ball joint. No welding, just a bit of drilling...

Carel
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Zamani
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Post by Zamani »

I have extended uprights meant for 16" wheels. On the track I wish I could fit 15" wheels. As far as I know Beninca reinforces the welded ones. The ones I have, 2 spindles were used per side to make 1 extended unit, and they were cut at an angle. I think TIG welded, I could be wrong, but I doubt if they MIG welded.
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Daniel
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Post by Daniel »

Sounds like what I am aiming to do - 2 uprights to create 1 but the welding procedure is critical, especially with alloy steels. Do it wrong and you end up with hydrogen embrittlement (bad things happen :( ), cracking etc.

Z - Why do you want 15" wheels over the 16's. Is it for tyres?
I need my 16's to fit over the brakes.

D
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Post by Micke »

In my case, I used to have 14" magnesium rims which needed shortening of the upright.

Another problem we solved by welding is the hole for the ball joint.
It is tapered, not straight. This means drilling it is not that easy. Hence, we just took the enitre lower part from the donor car including the tapered hole.
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Daniel
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Post by Daniel »

Finally have a home internet connection - slow but it's a start.

I'm still looking for a weld procedure for tool L6 which has the composition -
Cr - 1.2%
Mn - 1.3%
Fe - 96.5%
Mo - 0.05%
C - ??% (The machine couldn't read carbon content)

Any help on this, or anyone who has welded uprights and can tell me what they did will be appreciated.

Thanks
D
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Steve R
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Post by Steve R »

Did anyone come up with a clarification for the welding process - MIG, TIG, specialist whatever.... ?

Another question on extending the uprights:

What new length should be aimed for, or it it just a case of "so long as it fits under the wheel rim in use"?

thanks
S
83' GTV6, 3.0 24v supercharged
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