Ran 3 practice sessions with the clamped in front of the left rear. Car was really fast. Track owner took away the option to use clamped up. Now Only 2 options are bolted to birdcage ( so it rotates away from the spring in the corner) or z-link. Now i can see how the z- link would rotate into the spring just like a clamped up setup, but is a z- worth trying? Another car there had it and he looked to be quicker than the others. Does anyone still use this setup? What spring?
Limited late - z link option
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We ran a z-link with spring on the swing arm car .It was easy to set up and adjust, had a wide sweet spot.Best i remember had a 400 r/s spring,500 l/s with at least 150lbs of bite.
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Yeah, rule is 4 link or zlink only. Coil over must attach to birdcage. No clamp.Must be mounted in front of axle on left rear. Everything else is open. But we have a shock rule so no adjustable or re-valved shocks. Installed zlink tonight and cycled it through. Doesn't rotate a whole lot into spring. But definetly more than the 4 link with spring attached ahead of axle on birdcage on LR. Tried soft spring to get some preload and have spring rate on LR at full drop but even at 125# it has a couple inches of gap between spring and top of coil over cup/ mount. 225# had 4" of gap.Originally posted by save the racers View PostWe ran a z-link with spring on the swing arm car .It was easy to set up and adjust, had a wide sweet spot.Best i remember had a 400 r/s spring,500 l/s with at least 150lbs of bite.
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Need really long trailing arm.Originally posted by Dirtmod13 View PostYeah, rule is 4 link or zlink only. Coil over must attach to birdcage. No clamp.Must be mounted in front of axle on left rear. Everything else is open. But we have a shock rule so no adjustable or re-valved shocks. Installed zlink tonight and cycled it through. Doesn't rotate a whole lot into spring. But definetly more than the 4 link with spring attached ahead of axle on birdcage on LR. Tried soft spring to get some preload and have spring rate on LR at full drop but even at 125# it has a couple inches of gap between spring and top of coil over cup/ mount. 225# had 4" of gap.Modern Day Spec Wedge Racing
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Top / rear , used the longest bar we could find. Wondering about indexing birdcage a little bit differently, wonder if that'll get the wrap into the spring. Wondering about that for the 4 link also. Since its mandated to be in front- it indexes away from the spring. But maybe indexing and maybe moving one or the other closer/ further from the normal mount on points where bars bolt to birdcage we could lessen that negative effect.Originally posted by MasterSbilt_Racer View PostNeed really long trailing arm.
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The old Rayburn geometry with 32" trailing arm works pretty well for your application.Originally posted by Dirtmod13 View PostTop / rear , used the longest bar we could find. Wondering about indexing birdcage a little bit differently, wonder if that'll get the wrap into the spring. Wondering about that for the 4 link also. Since its mandated to be in front- it indexes away from the spring. But maybe indexing and maybe moving one or the other closer/ further from the normal mount on points where bars bolt to birdcage we could lessen that negative effect.
You could move the lower link closer to the axle and get a lot of angle in it. 20 degrees at leastModern Day Spec Wedge Racing
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We added the longer rear bars the second year.The car was very quick on the little bull rings.We could get it to hike the l/r up high if we wanted.It was never any faster like that.
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Update. First race, first ever feature win in Usra limited late model class. I appreciate all the help and discussion/ ideas all of you have given to my posts and others as well.I think it was possible only because of things you guys have posted and taking the time to help us guys out. Thank you.
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Right?! So we need to cover the rear end because what we did is so simple if they see it they'll duplicate it. What is the rear cover called and where do u get them. Some are printed.Originally posted by TheJet-09 View PostCongrats on your win! Now your competitors are going to be looking at what you're doing.
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Modern Images can make them for you and if you get him to do your wrap he can even print them to line up with your wrap and match it when on the car. Tell him Russ Ogletree sent you if you contact him.(706) 681-4665
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Kind of interested in clamping the left rear like was discussed earlier? Is there a specific bracket you buy to do this and do you remove the traction shock and just clamp the shock with the spring in front of the axle to wrap into the spring when under throttle? Thanks for any info.
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