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It also works with special X-, V- and diagonal bracing underhood and an aluminum rear bumper to double the car’s torsional stiffness.
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The cage protects the driver and ties into rear suspension attachment points. It has a safety cage of 1.75-inch-diameter 4130 steel tubing with a 0.095-inch wall thickness.
"The Comp Coupe team started with the 03 Viper frame, but “chopped some parts off and added a cage,” says Petersen. "This drivetrain rests in an updated chassis that offers a 31-percent increase in torsional rigidity (Dodge claims it's stiffer than the outgoing 2002 GTS Coupe)." With the goals of shaving excess weight and improving high-speed control, the Viper team was able to trim about 200 pounds from the car while improving the frame's torsional rigidity by about 25 percent." "The changes, however, go deeper than cosmetics. The Viper chassis was reengineered to eliminate 60 pounds in comparison to its predecessor, yet provide a 25 percent increase in torsional rigidity."ġ996 RT-10 (Same chassis as 1996 Gen-2 GTS, but with 400hp Gen-1 engine)
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"The second-generation Viper included engine modifications to add power, while reducing weight by 50 pounds. "The Viper has a high driveline tunnel, which also houses structural members that help account for its outstanding 5000 lb-ft-per-degree torsional stiffness." You decide for yourself what you enjoy more! (and please let us know).Īfter a quick search, i found a few quotes and extrapolated the relative stiffnesses to try to figure out the torsional stiffness of the Gen 2: Not knocking VW's decisions, just sharing some data. But the Audi is also hundreds of pounds heavier (despite a much smaller motor). In contrast, the Audi R8 is even stiffer than a new Viper. And, having just spent more time driving this car ******* the track this week, I think we succeeded the Gen 5 Viper is amazing on a track, and runs hard all day long - this car is an amazing and proven (time and again) track warrior.īut, please go drive the Gen 5 Viper for yourself, and tell us if you believe we have achieved the right balance between stiffness, and lightweight. We believed that a significant increase in structural stiffness, as well as a dramatic decrease in curb weight, would yield an amazing 'light on it's feet" performance for the new Gen 5 Viper. And, we also lightened the space frame significantly too! But, because we realized that this data was becoming an issue of competitive intelligence, we at SRT decided early on that we would not publish this information for the all new Gen 5 Viper spaceframe rather we would just share directional indications. Actually, our lab test data showed that the old car was better than your list indicates, and that we have further improved the all-new Gen 5 space frame by (well) over 50%. So consider the weights reported by some Italian and English supercar builders with appropriate suspicion.īack to structrual stiffness, according to the "data" you show above, the new Viper must have gained well over 100% stiffness increase! Dang, we should have claimed that!! (kidding). (all fluids are included in curb, in case any of you were wondering., and SRT will ONLY talk about curb weight - dry weight is irrelevant). As an example, some of our journalist friends do not understand even the difference between 'curb weight' and 'dry weight'!. Now for the bad news, don't believe everything auto companies tell you, nor all the 'data' journalists publish. (inevitable) mass-add trade-off in a sports car. The trick is figuring out the best stiffness vs. Impressive effort! Like you, some of us are avowed fans of an "appropriate level of" structural stiffness, for very important engineering reasons. Let me compliment you, Vancouver GTS, on your meticulous research. Land rover Freelander 2 - 28,000 Nm/degree Porsche 911 Turbo 996 Convertible: 11,600 Nm/deg Here's some older specs on all cars, Veyron being stiffest of allĪston Martin DB9 Convertible 15,500 Nm/degīMW E46 Sedan (w/o folding seats) 18,000 Nm/degīMW E46 Sedan (w/folding seats) 13,000 Nm/degīMW E46 Wagon (w/folding seats) 14,000 Nm/degīMW E46 Coupe (w/folding seats) 12,500 Nm/degįord Mustang Convertible (2003) 4,800 Nm/degįord Mustang Convertible (2005) 9,500 Nm/deg We all read about 50% stiffer chassis but no mention of actual specification for the 2013 Viper anywhere on the web.