Chris Wilson Posted February 1, 2010 Share Posted February 1, 2010 Unfortunately I have little on the MKIV's used occasionally in the JGTC, but this old article from Racecar Engineering shows just how far these things are removed from a production car! Quote Link to comment Share on other sites More sharing options...
JustGav Posted February 1, 2010 Share Posted February 1, 2010 Unfortunately I have little on the MKIV's used occasionally in the JGTC, but this old article from Racecar Engineering shows just how far these things are removed from a production car! Hmmm, strange, how you don't see them running those large offset wheels on a normal set of springs and dampers : Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted February 1, 2010 Share Posted February 1, 2010 I'd like to get my hands on a Supra JGTC car, I tried a few years back and was given a stupid figure, basically a 7 figure price! Quote Link to comment Share on other sites More sharing options...
Alex Posted February 1, 2010 Share Posted February 1, 2010 God I had a copy of that when it was new! Quote Link to comment Share on other sites More sharing options...
paul mac Posted February 1, 2010 Share Posted February 1, 2010 great read Chris, couple of things that caught my eye, a hydraulic powered cooling fan and what were they talking about when discussing suspension with a 4 poster rig Quote Link to comment Share on other sites More sharing options...
TLicense Posted February 1, 2010 Share Posted February 1, 2010 A 4 poster rig is a piece of equipment that you sit the car on. The wheels sit on plates which have hydraulic actuators under them. The actuators then bump the suspension up and down in a controlled fashion and the accelerations in the car are measured. It's basically the equivalent of a chassis dyno but for suspension. We have a 7 post rig at work which has the actuators under each wheel but then also had three actuators that we can use to pull the car down onto the pads to simulate aerodynamic force. On a Friday the cars will go out and we'll log the suspension travel and ride heights and then send that information back to the factory and replay the lap again and again on the rig until we get an optimal suspension set-up. In fact the closest I'll ever get to driving an F1 car was sitting in the 7-post rig car whilst it played a lap of Monaco. IIRC it was about 1.5mill to buy and install. Quote Link to comment Share on other sites More sharing options...
JODY T Posted February 2, 2010 Share Posted February 2, 2010 sounds like a cool piece of kit Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 2, 2010 Share Posted February 2, 2010 Them brake calipers are Quote Link to comment Share on other sites More sharing options...
Thorin Posted February 2, 2010 Share Posted February 2, 2010 Nice article, thanks Chris. Quote Link to comment Share on other sites More sharing options...
paul mac Posted February 3, 2010 Share Posted February 3, 2010 A 4 poster rig is a piece of equipment that you sit the car on. The wheels sit on plates which have hydraulic actuators under them. The actuators then bump the suspension up and down in a controlled fashion and the accelerations in the car are measured. It's basically the equivalent of a chassis dyno but for suspension. We have a 7 post rig at work which has the actuators under each wheel but then also had three actuators that we can use to pull the car down onto the pads to simulate aerodynamic force. On a Friday the cars will go out and we'll log the suspension travel and ride heights and then send that information back to the factory and replay the lap again and again on the rig until we get an optimal suspension set-up. In fact the closest I'll ever get to driving an F1 car was sitting in the 7-post rig car whilst it played a lap of Monaco. IIRC it was about 1.5mill to buy and install. thanks for taking time to explain Quote Link to comment Share on other sites More sharing options...
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