mutantZ Posted January 26, 2012 Share Posted January 26, 2012 (edited) Came across this link today and was wondering what the limitations of this style of chassis? It seems like it would be more resistant to twist, but I am by no means an expert. http://www.biokustoms.com/portfolio/custom-suspension/one-off-systems/datsun-521/ Sorry posted this in the wrong forum. Meant to post it in the chassis forum. Edited January 26, 2012 by mutantZ Quote Link to comment Share on other sites More sharing options...
johnc Posted January 26, 2012 Share Posted January 26, 2012 Driveline packaging is a pain with a backbone chassis. They are generally not used in production vehicles because the weight benefits get offset by the additional structures needed to meet offset and side impact rules. Quote Link to comment Share on other sites More sharing options...
260DET Posted January 27, 2012 Share Posted January 27, 2012 Triumph Spitfire for one had a backbone chassis, separate from the body back in those days. As John says side impact is a real problem, really it is more practical to build side impact protection into the structural design of a chassis so that protection does two jobs. Always a good thing. Quote Link to comment Share on other sites More sharing options...
kiwi303 Posted January 27, 2012 Share Posted January 27, 2012 About the only current uses for backbone chassis today that I can think of is moffroad and military trucks... German Unimog and Russian Tatra 813 families. Quote Link to comment Share on other sites More sharing options...
zero Posted January 27, 2012 Share Posted January 27, 2012 (edited) I think TVR used something resembling a backbone chassis fairly recently as well. Edit: Here's a beefy looking one. Edited January 27, 2012 by zero Quote Link to comment Share on other sites More sharing options...
Chaparral2f Posted January 28, 2012 Share Posted January 28, 2012 I built a backbone chassis for my Z31. One of the main reasons for building it was to move the engine back and make it an integeral part of the chassis. The engine is set back about 4". The front and rear are Jaguar, It's really light, and extremly stiff. there are some changes I"d make if I were to do it again, but nothing major. Quote Link to comment Share on other sites More sharing options...
seattlejester Posted January 28, 2012 Share Posted January 28, 2012 Are my eyes fooling me, or am I seeing inboard brakes in the rear? Quote Link to comment Share on other sites More sharing options...
Leon Posted January 28, 2012 Share Posted January 28, 2012 Are my eyes fooling me, or am I seeing inboard brakes in the rear? Yes, that's a trait of the Jaguar rear suspension. Quote Link to comment Share on other sites More sharing options...
m1ghtymaxXx Posted January 30, 2012 Share Posted January 30, 2012 Didn't the Toyota 2000gt use a similar chassis? Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted February 1, 2012 Share Posted February 1, 2012 We talked about his a few years ago. I was thinking along the lines of not a full backbone chassis but more like the top half of one tied into the existing body. I was looking for ways to make the zed stiffer fron the front strut mounts to the rear strut mounts with out having an intrusive cage. In the end I desided I wanted to targa the car so I needed a cage anyway. Other cars with backbones....Dodge viper, most lotus's and Marcos.. Cheers, Douglas Quote Link to comment Share on other sites More sharing options...
HowlerMonkey Posted February 6, 2012 Share Posted February 6, 2012 My bud build a few similar machines when he worked as a fabricator for mosler. Quote Link to comment Share on other sites More sharing options...
Michael Posted February 19, 2012 Share Posted February 19, 2012 One possibility is to run bracing-tubes along the transmission tunnel. Triangulated bracing would be welded in between the front strut towers and the firewall (piercing the firewall), then continue along the transmission tunnel, and then kick up again to meet the bracing connecting the rear strut towers. Quote Link to comment Share on other sites More sharing options...
evildky Posted March 25, 2012 Share Posted March 25, 2012 C5 and C6 corvettes use a backbone chassis Quote Link to comment Share on other sites More sharing options...
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