? Total amount(length) of tubing used ..

[digbydog2]

I was curious how much tubing was used in the fabrication of a typical NASCAR chassis?? I have no idea. 250 feet???

I am in the very, very, very early conceptual stage of my next challenge. Porsche Spyder replica with tube frame and S2000 running gear.

I have spent the last hour reviewing all the messages on the board and there has been a fair bit of information on tube frames/roll cages. It would seem a Miller Dynasty 200 and DOM 1 5/8 tubing with .134 thickness would be fine. I have a 110v MIG but the discussions would suggest that it would not be suitable.

Any thoughts on .125 tubing and a 110v MIG and/or suitablity of this wall thickness for a frame??

Andrew.

[digbydog2]

oops, hit return before completed thought.

complete thought as above (edit)

[Grampa]

Welder selection

Depends on base metal..if you are using mild steel tubing then the GMAW process works fine..I use a 110 wire feeder on mild steel all the time..Now if you go to 4130 chrome moly tube then that stuff shoudl be welded with GTAW/tig process..has a lot to do with the properties of the base metal..

The amperage rating of the machine will have to do with the thickness of the material you are welding..Since most automotive does not involve anything thicker than 3/16 or 1/4 you will not need one of the high amp machines..

I have selected the Dynasty 200 as my next machine which will be in addition to my current 110/mig machine..Since the Dynasty also does Stick it can handle making the necesary fixtures and jigs that you will need to build..

In general in weldment design we pick the base metal..mild steel..aluminum..high alloy steel...stainless or what ever then select the proper welding equipment to do the job we require..

As far as how much tubing you will require..sketch up in scale your proposed chassis design and then estimate from that..BTW steel is cheaper if you buy full 20' bar lengths and cut it yourself to the lengths that you need..

Hope this helps you
Grampa

[arcdawg]

cool man

that sounds like one **** of a car, the s2000 is a sreamer and the spyder body O.M.G. KEEP US POSTED, and i would not recomend using a 110v mig, if its mild steel you can get a 220v mig and go that route, this is something that you want to be assembled the right way, especially with a 9 grand rev limit

brian

[Paul Seaman]

If the cromoly is the choice and you have some patience it too can be done in mig, it requires a different filler wire I think it is e70,,I have to look it up for the particulars but it can be done. I have the mm210 and a 220volt mig has some duty cycle strengths over the 110volt models with 20% duty cycle you can only weld 2 minutes in a 10 minute period, which on tubing is not very long.

I weld 1/8" wall square steel tubing all the time and in mild it is really nice to fit several pieces and tack them and then go finish all the welds at one time which is where higher duty cycle is the call.

Most good suppliers have demo or training models you can try get some samples of the material you plan to use for the chassis and go try em out. Weld well weld safe