Moti,
Thanks for the heads up on post fab treatment needed for CrMo. I didn't know that.
I actually built a custom rear set 4 pt weld in Cr-Mo cage for a mk1 Rabbit (with 2.0L Passat motor) years ago. Never finished the car and the new owner redid he cage, but still good to know.

So if I'm reading this correctly, NASA no longer issues new log books for ERW caged cars and there isn't a wall thickness break for running 4130 vs. DOM. There USED TO BE a thickness break for 4130 vs. EWR (of which is not allowed any more). I'm not sure you're supporting your argument?

As a Chump Car participant for the past few years, I would say most of the cars I see have been around for 3+ years. Maybe LeMons cars don't last that long, but Chump Cars do last for years (they maybe ugly, but they last).

^^^^^^^^^^^^^^^^^^^^This^^^^^^^^^^^^^^^^^^^^^^^^

Or don't?

All of your posts have been trying to justify spending a dollar to save a penny WHILE NOT HAVING A VESTED INTEREST. Keep in mind, I'm assuming that you're just a ERW enthusiast and not an ERW seller/manufacturer because in that case I take back my assertion that you don't have a vested interest.

To use the MSM as an example, you're the type of poster who says "oh man, the MSM is awesome and that's a steal at $10k! It'll easily make 200 to the wheel after once you replace literally all of things that are attached to the turbo and spend $5k on it!" versus starting with an NB1/2 for $5k and buying $5k in turbo parts.

See, that's where you're wrong. None of my posts have been trying to justify using ERW over any other option. All of my posts have been defending the use of ERW in certain circumstances where warranted as a valid option among many different options. I am the only one in this thread who has raised the counterpoint against blanket, unfounded and unreasonable statements that practically equate ERW with AIDS. Get real man. I'm not the one with any vested interests here as building roll bars/cages and racing cars isn't my business, just a hobby. I have the perspective of having been around a lot of different racing for many decades and I know that there are many different ways to build a "safe" race car. Rules compliance is the responsibility of the fabricator, vehicle owner and event participant.

Now quote the second part. Here, I'll do it for you:

ERW is cheaper! It's just as strong and safe after you spend twice as much effort/time on it to make sure that it's structurally sound! I don't understand why ERW gets such a bad rap!

Like I said earlier, for someone who has ALREADY FUCKIN' ADMITTED that DOM is the superior option, you sure are spending a hell of a lot of time defending ERW. No one has denied that ERW can be used to make safe roll structures, it's just that ERW is more likely to be used in explicitly unsafe roll structures; you're taking a rounding error and turning it into a significant digit.

https://cimg9.ibsrv.net/gimg/www.mia...6de15e6a4b.jpg

The Fifth Third Bank sponsorship sort of confuses me. That name does not really make sense.

they should just call it 53%

Apparently ERW is fine if you hook it together with this fancy duct tape instead of welding it.

How They Really Pulled Off This 'Duct Tape Roll Cage' Stunt

--Ian

If Fifth Third Bank merges with Third Fifths Bank, does the resultant company become One Bank?

More like the Two and Four Fifteenths Bank. But actually, It's the fifth third not five thirds and likewise, third fifth as opposed to three fifths. Technically you'd still have only 8/15ths of a bank. Sounds questionable. We should all invest.

5/7, would invest again.