05-07-2010, 03:03 PM
(This post was last modified: 05-07-2010, 03:05 PM by Larry Herman.)
Hopefully you haven't fabricated those door bars yet, because they are completely worthless. IMHO they are both heavier and weaker than a simple X brace. They are fundamentally an unsupported trapizoid, and because of the double bends create an unstable complex of tubes that can easily be concaved on impact.
I have also seen plenty of cages that had "Nascar Bars" that were also worthless because they too had no strength in tension or compression. Instead, you should consider making a gusseted X brace similar to what a Porsche 996/997 cup car has. Straight tubes are stronger, and the pyrimidal shape offers significant strength in compression. Of course YMMV.
I have also seen plenty of cages that had "Nascar Bars" that were also worthless because they too had no strength in tension or compression. Instead, you should consider making a gusseted X brace similar to what a Porsche 996/997 cup car has. Straight tubes are stronger, and the pyrimidal shape offers significant strength in compression. Of course YMMV.
Larry Herman
2006 Cayenne S
2010 Allegro RED 38QBA
Nationally Certified PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
2006 Cayenne S
2010 Allegro RED 38QBA
Nationally Certified PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car