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Author Topic:   pavement smart/dirt dummie
pavement racer
Dirt Newbie

Total posts: 1
posted April 14, 2005 06:29 AM  
Retired Nascar pavement chassis guy needs to under stand how and what makes these dirt mods so way cool fast. Please someone explain how and why running 2links on the left rear floating bracket uphill dramatically on top link and slightly up on the bottom w/short j-bar downhill to pinion affect the chassis, what chassis loads does this incur in relation to instant center locations on trailing arms verses forward bite, and where are the loads transfered to when the chassis lifts up (or lays over in pavement terminology)I have a friend here in AZ who is our local Champ and I am trying to work all this out (geometry wise).

21racer
Dirt Full Roller

Total posts: 56
posted April 14, 2005 07:42 AM  
you can click on the menu on this site then click toolbox scroll down there is a article explaning 4link principles.
the upper link at an upward angle will lift the chassis pushing down on the tire the lower affects rear steer in the car
the short bar connected to the pinion on the rearend pushes down on the rearend at its center loading both tires more evenly when cornering than a long bar will. that is a short explanation. remember car wants to slide on dirt,this set up would push into the wall on pavement i hope this helps

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