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Old 02-17-2010   #39
Pushit2.0
15min late to the world
Re: Roll cage feedback

The 6 or 5 point roll bar(6 point is with and a 5 point is with out a passanger side door bar) is needed at 11.49 ET and up to 135mph in the 1/4 mile. The 8 point roll cage with or with out a passanger side door bar is good to a 8.50 or 150mph.

the 6 point roll bar can be either mild steel or chrome moly tube. mild steel would need to be 1 3/4" .120" wall DOM tube (drawn on mandrel). Mild steel joints can be MIG or TIG welded, with ER70s filler rod/wire. Chrome moly would need to be a 1 3/4 OD and .083" wall DOM tube. Any joint with Chrome Moly in it needs to be TIG welded using ER70s filler rod.

The 8 point cage with or with out a passanger door bar needs to be made from 1 5/8" OD .120" wall DOM mild steel, again MIG or TIG welded. Or Chrome Moly of 1 5/8" OD and .083" wall DOM can be used, again any joint with chrome moly needs to be TIG welded.

I recommend with stock style seats for the car to have the door bar on the driver and/or passanger side removable or a swing out. But if you have a high sided race seat the door bar can make it easier to get in/out of the car if you know what to do.

I think most people that complain about or hate a roll bar/caged vehical is riding in a car where it is either not installed properly or the cage is not design around you, the driver. Which is the hole point of a roll bar/cage, to save the driver.

~John
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Moon taxi: 9.45@156.9 mph 41psi 2011... Letting people down sense 2012.
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