Suspension by the Numbers - Car Setup How To

Discussion in 'General – Setup & Tuning, PSA Knowledgebase' started by phate, Mar 16, 2016.

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  1. Redline

    Redline I done fucked up for the last time. BANNED Greenie Member

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    I wish our coilover kits put the springs over the rear shocks instead of maintaining the stock, separate position for the springs. I guess it's a clearance issue.
     
  2. Nliiitend1

    Nliiitend1 aka "Nintendo" Greenie Member

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    For what reason?
     
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  3. Mauro_Penguin

    Mauro_Penguin Punk in Drublic. #BlackLivesMatter Motorhead Platinum Member

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    Becuz dumb idea.
     
    Mauro_Penguin, via a mobile device, Jun 5, 2017
    #43
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  4. ConeKiller

    ConeKiller Motorhead Greenie Member

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    It would make calculations easier, and strange things happen with the rear motion ratio and the springs.

    Overall, not a big deal.
     
    ConeKiller, via a Nexus device, Jun 5, 2017
    #44
  5. Motherfnmonsta

    Motherfnmonsta Greenie Member

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    thanks for the write up but any way to get the images back up
     
  6. phate

    phate Motorhead Silver Member

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    Maybe if you ask really nicely. And send nudes. Nudes always help.

    Sent from my SM-G935V using Tapatalk
     
    phate, via a mobile device, Jan 15, 2018
    #46
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  7. Motherfnmonsta

    Motherfnmonsta Greenie Member

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    pretty please with cherry on top sorry no nudes to give unfortunately
     
  8. shift8

    shift8 Greenie N00B Member

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    A lot of the images are still in photofuckers here I believe: http://s64.photobucket.com/user/phate1985/library/phate MS6/Suspension?sort=3&page=1

    I'm able to grab the images through some magic (ctrl+shift+c, find the real image link, wget it to my desktop... ok, so not really magic). I was planning to go through the posts here from @phate and try to correlate the images I found to the post, and then upload the images here. Not sure if that's effective though. I could maybe grab a list, upload them to the forum, and a moderator could just change the links?

    This is one of the more useful posts I've read.
     
  9. phate

    phate Motorhead Silver Member

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    Sorry guys. I've been meaning to do this, but have been going full bore getting the car ready for the season. I should have time to upload everything to the MSO server in the next couple weeks and add the pics back in.

    Sent from my SM-G960U using Tapatalk
     
    phate, via a mobile device, Apr 11, 2018
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  10. therealleifmadse

    therealleifmadse Greenie Member

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    Psssst, been a couple weeks :)
     
    therealleifmadse, via a mobile device, Sep 2, 2018
    #50
  11. Motherfnmonsta

    Motherfnmonsta Greenie Member

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    Yes please. I am going to track the car at cmp at track night and would love to get the car dial in.
     
    Motherfnmonsta, via a mobile device, Sep 2, 2018
    #51
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  12. John

    John Full Fledged Member Greenie Member

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    Honestly fellas, the references he cited contain most everything he discussed here anyway. Check 'em out.
     
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  13. phate

    phate Motorhead Silver Member

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    Updated the 1st post
     
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  14. deldran

    deldran Greenie Member

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    Awesome read. Once third car is in my driveway, I am going to start diving down this rabbit hole.
     
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  15. DAV

    DAV Greenie N00B Member

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    Interesting series with some seriously flawed perceptions. Why would you include the bump stop in the spring rate calculation? If you're driving around on those your coil springs are way too soft. No consideration for front/rear drive? No consideration for the impact of unsprung weight on ARB? The calculations and theories contained in this post do contribute to predicting understeer/oversteer, but not in a vacuum.
     
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  16. Easter Bunny

    Easter Bunny Professional Engineer Motorhead Platinum Member

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    im only going to reply to your first question since that alone will make it clear that you have no idea what you are talking about.

    the bumpstops on these cars are multi stage and function as part of the spring from the factory.
     
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  17. phate

    phate Motorhead Silver Member

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    Bump stops should only be included if/when you are using them as a main spring - or more so for when you do use them. That will help you understand the behavior for when they are utilized. It's a missed aspect, most people just toss them in without regard for their rate, let alone when they engage. [I actually mentioned this in the first post, if you read it.]

    No need for front/rear drive consideration. The roll bias calculations are just that - steady state roll bias. The fact that your drive type is one or the other doesn't influence the roll bias. A different quest is how to effectively put down power - and sometimes that leads to compromises in roll bias in order to obtain better application of power. [Or, for me, a balance of roll stiffness contribution between the main springs and ARB's that didn't compromise roll bias.]

    What in particular do you mean about the unsprung weight influence on the ARB? I'm not sure I see what you're getting at.
     
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  18. DualSpeed

    DualSpeed Greenie Member

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    Hey Clint, how's it going? I know I'm late to this, but is it ever a good read. Are you able to run different engine/trans, diff mounts in your car? I'm looking at building mine like this for a street/track car.
     
    Last edited: Jun 21, 2020
    DualSpeed, via a Samsung mobile device, Jun 19, 2020
    #58
  19. phate

    phate Motorhead Silver Member

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    Yep - If you want, start a new build thread and give me a mention if you have any questions.
     
  20. DualSpeed

    DualSpeed Greenie Member

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    Ok, thanks. I've built lots of cars, but have never done a thread. All good! I'll tag you in it, when I start.
     
    DualSpeed, via a Samsung mobile device, Jun 22, 2020
    #60
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