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Author Topic:   Adjusting 4-bar LR/Swingarm RR
modified17
Member
posted June 19, 2002 07:31 PM
I changed my car this winter from a 2 bar to 4 bar LR and swingarm RR. The car is a bullet on a tacky track or a slick track with a cushion to run on. However, when the whole track gets slick from top to bottom, I'm slow (slower than most everybody else). The car has a metric clip. Front springs are lf 900lb, rf 1000lb. Shocks are Pro 7500 lf, 7630rf. Left rear is 4 bar with 225lb spring behind axle and 9400 shock. Right rear is 300lb spring on the swingarm and a 9400 shock. Because of the location of the 300lb spring, it equates to a 200 lb spring if it were mounted on the axle. The upper and lower bars and the RR are about level and the lower bar on the lr is level with the upper bar at about 15 degrees. I run a J-bar in second to bottom hole and the top of the J-bar is up high on the frame. Rear percentage is 57% with driver and 58.5% when we bolt on 60lbs. Does anyone see problems with this setup? What do you think about running a short rod to the left side of the pinion? Also, I have seen Jim Shereck run his lower 4 bar rod with a spacer between the frame mount and the axle so the lower 4 bar rod is shorter. What about that? Also I have heard some metric drivers run as much as 1200lb rf and 1100 lb lf. Any help would be appreciated.

[This message has been edited by modified17 (edited June 19, 2002).]

2nd2none
Member
posted June 19, 2002 07:47 PM
i started runnin my LR behind and started increasing the spring, as of now i got a 250 lb spring on LR and 175 on RR, this improved my bite on slick track a ton,