Infiniti G20 racecar race car
 Keeping the kiddies safe!


Project Infiniti G20 Racecar

by Martin Gonzales and Steve Rockwood


Check out the rest of our Project Infiniti G20 Racecar build click here!


Accidents, the downers of all motor sport related activities, and reminders that things don't always go as planned.  Though spinning out of control or taking Dukes of Hazard jumps are not part of anyone's dreams of racing glory, it doesn't mean shit has to happen before preparing for the worst.  Luckily, for those of us not inclined to think ahead, NASA will require us to install a roll cage before we can compete.  In this installment of Project G20 Racecar we will cover what is by far the most important part of our racecar's safety equipment: the roll cage.  We will be covering everything from cage materials to appropriate roll-bar padding.


Track accident roll over
Do we really need a caption for this?


A roll cage's primary function is crash protection.  Whether rolling over, flipping end over end or crashing into stationary objects or other cars, the roll-cage is what keeps the car from crumpling and crushing your soft squishy body.  In case that's not reason enough , it will also do wonders for the structural rigidity of your vehicle.  A flexible chassis will squirm and not allow the suspension to perform at its full potential, making it harder to predict the suspension's effect on handling.  Most race cars, with their extensive roll cages, ride better than their street driven counterparts despite running significantly higher spring rates.  This is mainly due to impact energy being transferred directly to the suspension rather than your butt first. 

When adding bars to a cage on a limited budget concentrate on safety first, not handling.  Your well being is of paramount importance: Do not skimp!  Accidents happen, have happened and will happen.


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Sunday, August 09, 2009 7:32 AM
MOAR updates! Weight, engine specs?
Wednesday, January 06, 2010 6:45 PM
How much $$$$ do you put on your safety?
Annie Sam
Annie Samlink
Monday, January 25, 2010 5:05 PM
Are you talking about this car specifically, or just for any race
car? Generally for a car itself, it really depends on how much safety you're looking for and how much you're willing to spend. Saftey can range from about 3k to 10k and up. You can get an acceptable roll cage done for around $1,500 - $2,000, which is where the bulk of the costs is from. Mine cost around 4k. It depends on how involved and how precise you want the cage to be. It can be built to Smalltown racing series spec, or world challenge spec.... Belts can range from 200-600 depending on whether you want quick release or latch n link systems. Halon fire systems can cost between 500 - 1,000... and some series allow just a fire exstinguisher securely mounted within drivers reach. my guess is martin and steve paid 4k in total for the cars saftey equipment...
Wednesday, February 29, 2012 5:00 PM

you guys should use my g20 for the cage pic
Jonathan Spiegel
Jonathan Spiegellink
Wednesday, July 03, 2013 6:57 AM
NASCAR door bars aren't designed specifically for strength or stiffness, but for driver protection. In an impact, the design allows for much more energy dissipation than an x-brace. There are actually three "impacts" in any collision. Primary impact is the car striking (or being struck by) something - essentially this doesn't harm the driver. Secondary impact is the driver impacting against the belts, seats, or other interior parts of the car. This certainly can harm the driver - bruising and breaking bones. Tertiary impact is the most harmful - internal organs impacting against each other, the abdominal cavity, the ribcage, and the skull. Tertiary impact is the most deadly. Belts are designed to stretch, seats and helmets are padded, all to lengthen the distance and increase the time over which deceleration occurs, reducing the g-forces transmitted to the driver. The NASCAR door bars are designed to "cushion," not to stiffen or strengthen.
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