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Author Topic:   spring location on a 4 bar
fastow
Member
posted September 25, 2003 12:00 AM
check for binds in the birdcages, especially if they're 3 piece. some times they will bind up when each piece is bolted together.
we used to run lr in front clamped up, using the throttle to control bite, we switched to lr behind on a dead shock and control shock in front and i found this a lot more progressive, you can feel as the car starts to roll the LR biting harder.



fastow
Member
posted September 26, 2003 09:05 PM
all your four bar arms should point slightly toward the centre of the car @ the fram mounts.
if you have the springs in front of the axle but not clamped up (still floating on the birdcage) the car will seem stiffer as the bird cage rotates (indexes) the springs are compressed from both ends (chassis pushing down and birdcage pushing up).
hope that helps.


fastow
Member
posted October 01, 2003 11:10 PM
the birdcage indexing (timing) is interesting question. I have asked this before (on this forum) and didn't get a reply, but i too would like to know.
as far as i know, you would normally run a spring around 25lb stiffer on the LR if it is clamped up to the axle tube in front of the axle. but i might be wrong


norightturn
Member
posted October 02, 2003 08:38 PM
4 bar, L spring behind on bc, R in front on bc. Car tilts (generally speaking) on CL of rear to the right. LS BC indexes top toward front keeping spring load more consistant throughout the downward movement of that side of the rear. RS BC indexes top toward rear increasing spring load and transfering weight to the RR tire at a accelerated rate. If you think about it, it's just a way to get alot of weight transfer to the tires quickly without all the chassis roll. In turn, keeping the car more stable and speeding up your weight transfers. Other than that the standard 4 bar rules apply. Oh and by the way keep the BCs vertical at RH and work from there. Good luck