Recent content by radracr

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    Automotive Race car suspension Class

    Ranger Mike, It took me a few days to pick my jaw up off the ground...9C on a rear shock?! WOW...it seems to me the fronts would be trying to transfer weight to the rear (6R) but the 9C rears would be resisting? The 7C on the fronts and 5R is 'close' to what I'm currently running. Referring...
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    Automotive Race car suspension Class

    I know shocks by numbers: 4, 6, 8, 9, etc. but I'm sure these correlate into velocites? And, which is a better way to undestand a shock - number or velocity? Next, how to establish a shock baseline for each corner? Do both front shocks need to be equal? Both rears equal? Or is assymetry better...
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    Automotive Race car suspension Class

    Ranger Mike - thanks for continuing to follow me along. I truly appreciate the feedback and insight. You have forced me and my team to continue to hunt for information. AND, measure…measure…measure... Now, I know you say that I can't compare this year to last year BUT…I've studied the videos...
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    Automotive Race car suspension Class

    Update: 1050 RF, 1000 LF, 250 RR, 200 LR = Text book. The car was terrible - loose all the way through. The RF is sticking better but not great. Tire temps improved. Changed to 1050RF, 1000LF, 200RR, 175LR. We also changed the front ride height so that it was 7" across. It was 6. MUCH BETTER...
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    Automotive Race car suspension Class

    Ok, I've had a few beers, a few steaks, even a few winks no I'm on a mission to, as we say in Texas - git'r done. Again, one of my guiding lights has been to study - frame by frame - when the car was bad-fast. It closely replicated what you are saying. The Right side compressed - the RF more so...
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    Automotive Race car suspension Class

    I'll be curious to hear this answer. First thought is compression of the springs but that would mean the LR would be in near coil bind. Some old notes say: Motion ratio: RF = .607; LF = .671 My upper and lower control arms from a 70-81 Camaro. I think it's time to run some more...
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    Automotive Race car suspension Class

    I'm not comfortable in the accuracy of these number but here it goes - the fronts don't have rubbers on them and I'm not sure if I 'reset' the rear rubbers. RF = 1.6 LF = 1.3 RR = 2.3 LR = 2.8
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    Automotive Race car suspension Class

    Ranger Mike, All I know about my ARB is that it came off of a 1978 Trans Am and is 1-1/4" diameter. As far as motion ratio, the software says that with a 950#RF spring the RF wheel rate is 271. @ 800# LF the wheel rate is 229. Track with on the RF = 35.6. LF = 32.0. My Right Swing Arm is 60.7...
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    Automotive Race car suspension Class

    Could I interpret what you saying as having too much spring split on the front - 150#? No racing until the May 17th. This will give me lots of time to work out the details, and change the cam. Based upon our shock travel = ~1.3" each side I'm inclined to 'go by the book' for the front springs.
  10. R

    Automotive Race car suspension Class

    I'm not worthy...:smile:….I'm not worthy but I am drinking a Modello trying to digest your Tupperware. (I ran outta popcorn…) Taking a trip in the way-back machine, I've studied the videos from when we broke the track record and when we couldn't get out of our own way - this year. In...
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    Automotive Race car suspension Class

    Sorry, Ranger Mike. I had to think it through. Since my car is loose on EXIT, and not transferring weight to the right side THAT's why I need to stiffen the LF. (Versus loose-in and at apex = stiffer RF, which is not me.) Got it! Grasshopper getting wiser...and soon...faster!...
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    Automotive Race car suspension Class

    Looking at and comparing the LF tire to the RF - the LF certainly does look like it is working harder. The LF tire appears to be scrubbing more so than the RF - real gooey and lots of rocks. Or to put it a different way, the RF isn't showing near the amount of wear as the LF - no rocks are...
  13. R

    Automotive Race car suspension Class

    It does not appear to be rolling over as much as it did last year. So yes, that has improved. 3297# (full of 22 gallons of fuel.) Left = 55.9 (versus MAX 56.0) Rear = 46.1 (versus MAX 47.5) Cross = 46.5 (after race. Most of the day it was in the 45s. We put many rounds in/out before the race.)...
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    Automotive Race car suspension Class

    Ranger Mike, We ran our first race of the year after setting up the RC. I have to say - I'm disappointed. I really expected the front tires to shred the track. The feedback from the steering wheel was smoother but the car did not feel like it would take too much 'wheel'. (I felt like the...
  15. R

    Automotive Race car suspension Class

    Dig out the notes, RM! It's a 68-76 block. My crank is ground for larger than stock bearing clearances. I have made a change this year to reduce the rod side clearance.
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