I have a '66 Biscayne ( same ch***is as a '65), 496, 4 speed, 12 bolt, M/T 10.5/29/15 slicks. I am trying to improve traction when I launch this thing. She is running 11.60s s with a 1.70 60 ft.. I have fiddled with an airbag in the p***enger side rear spring and different spring and shock combinations. I am now trying to adjust the instant center( where the upper and lower control arms would theoretically intersect if they ran through the entire car) more towards the center of the car instead of slightly in front of it (by my calculation, hard to do with the body on the frame). I understand this will benefit planting of the rear tires and hopefully improve my launch/60 ft times. My plan is to decrease the upward angle of the two upper control arms so they will intersect with the projected line of the lower control arms more towards the center of the car. I believe by adjusting the angle down on the two upper bars by about two inches it will get me there. Just want to hear from those with more ch***is experience if I'm on the right track. Thanks
Lower the rear of the lower control arm on the rear axle 1 to 1 1/2 inches. This will make it hit the tires harder. Adjust your tire pressure so you have about 3 wrinkles to be front of the tire when you leave
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