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Thread: Is our suspension setup correctly by aftermarket strut MFR's? Is the bias correct?

  1. #71
    One day....it will be on 4 wheels. supporter
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    I'll tell DG what's Stiffer.
    Building a House, Car Mods on hold!
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    I read your post in chat MR2 regarding the rates being really high. I think you're interpreting them wrong. The actual wheel rate of my setup based on the mechanical reduction is 11K Front's and 9K rears. That's the line called wheel rate.

    The spring's I require multiplied by the motion ratio in order to obtain those wheel rates are 13K rears and 11K fronts.

    The "Ideal Wheel Rate" for a stock 3/S is 6K front's and 4.5K rears. The actual spring rates required to achieve the ideal are 6K front and 6K rear.

    Notice how this scale is not linear.

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    Hmmm... so is the pivot in front of the wheel or straight inboard from the wheel? Seems to me it's a little of both.
    1995 Dodge Stealth R/T Turbo
    Mods: DR750s, BC Sportsman rods, Ross pistons, ACT HD 6 puck clutch, 5 speed transmission, 300M output shaft, Broomfield racing billet transfer case housings, Spectre air filter, GM 3.75" MAF w/translator, DN Pre-turbo pipes, Pampena/CX Racing dual core FMIC, M2 Performance turbo-back exhaust, Walbro 450lph E85 pump, SXPerformance fuel filter, stainless fuel feed lines, EK2 Mfg fuel rails, SXPerformance AFPR, 1000cc Bosch injectors, 99 VR4 replica ECU w/ Chrome for tuning, Kenne Bell Boost-a-Spark, Blitz SBC i-D boost controller, IPS oil cooler, Intrax springs on KYB GR2 struts, Enkei Kojin 18X9.5 +30, Nexen N3000s, 99 front end, carbon fiber steering wheel, Pioneer AVH-X2600BT, JL C2 6.5" and 6"x9" speakers, free 4 channel amp for subs (LOL), twin Alpine 10" type E subs.

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    When you jack your wheel up unsprung from resting... when you raise the tire 1" does the shock travel more or less than 1"? There's your answer.

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    ahhhhhhhhhhh 6k and 4k, that's better I kept the rears and had double progressive 300lb front's put in, have not spent enough time playing with the valving to see if I like it or not

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    Quote Originally Posted by J. Fast View Post
    When you jack your wheel up unsprung from resting... when you raise the tire 1" does the shock travel more or less than 1"? There's your answer.
    Fair enough. Glad we're dealing with actual measure values rather than assumed ones

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    Where this gets interesting... say you know 3/S rear shocks have 4" of overall travel from stop to stop. When we lower the chassi via lowering springs 2" we automatically think we have 2" of shock travel remaining... we actually have just shy of 2.5" because of the motion ratio.

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    subscribed. interesting reading so far. is 1.6 hz the stock 3/s rate for ECS on the hard setting, or the stock rate for non-ecs? where does n/a fall into that?

    my butt doesn't seem to like much past 1.6hz--at least not for a car that sees daily use.

    can we also infer that my wife's 03 sonoma crew cab is .5hz..since it's floaty as hell?

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    Quote Originally Posted by J. Fast View Post
    Where this gets interesting... say you know 3/S rear shocks have 4" of overall travel from stop to stop. When we lower the chassi via lowering springs 2" we automatically think we have 2" of shock travel remaining... we actually have just shy of 2.5" because of the motion ratio.
    weren't you going to make tube subframe for your car? these specs won't apply to your race car anyway.

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    Quote Originally Posted by mehrshadvr4 View Post
    ... these specs won't apply to your race car anyway.
    Sure they will. If anything what I will be gaining is shock travel. The adjusters I've selected have an adjustment range of an additonal 100lbs (2K). When I add a little camber, change caster and change the lever the motion ratio will change to about 1:0.8 ish give or take. I'll have plenty of valving and spring preload for the fine tuning. I can add more spring weight in but it's really difficult to take it out.

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