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  1. Replies
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    2,298

    I'm a firm believer that the spoiler acts much...

    I'm a firm believer that the spoiler acts much more like a Gurney flap than what would be considered a spoiler. Hence why 90 degrees actually works.
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    660

    Not sure about tubing lengths but obviously the...

    Not sure about tubing lengths but obviously the correct way to measure is from center of ball joint to center of heim (the rear one). The left side lower should be 16-5/8. That's with a 10-1/2"...
  3. Thread: RR load numbers

    by Matt49
    Replies
    19
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    3,611

    If you do that, it may help you a little getting...

    If you do that, it may help you a little getting into the corner but it is going to really hurt you coming off.
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    5,698

    If it were my car and it was "a smidge tight" on...

    If it were my car and it was "a smidge tight" on entry, I would take j-bar out until it wasn't. You'll also get off the corner better. Most cars (especially with a low HP motor) have a pretty broad...
  5. Replies
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    5,506

    I feel like people are lost on the fact that the...

    I feel like people are lost on the fact that the "top level" racing classes (as viewed by the American public) are basically spec classes with enormous marketing potential. The "drivers" that get...
  6. Thread: stack spring

    by Matt49
    Replies
    25
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    4,305

    An important thing to keep in mind is that while...

    An important thing to keep in mind is that while we talk about a load at a certain travel, what we really care about is travel at a certain load.
    The same goes for shocks. We talk in terms of...
  7. Thread: Hike up issue

    by Matt49
    Replies
    9
    Views
    2,078

    Excellent point. The OP should carefully inspect...

    Excellent point. The OP should carefully inspect all axle splines, drive plates, and spool for damage. Chatter in the drive line on one side or the other could cause some strange problems like this.
  8. Thread: stack spring

    by Matt49
    Replies
    25
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    4,305

    It is very dependent on your car and the rest of...

    It is very dependent on your car and the rest of your setup. No easy answers. You also need to know how much travel you are currently getting and what your load is at that travel. And if you're...
  9. Thread: Technology

    by Matt49
    Replies
    11
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    2,545

    It's a blog post, dude. It doesn't even say "our...

    It's a blog post, dude. It doesn't even say "our 4-post testing is better than..." or anything remotely close to trying to sell the service that they offer over anybody else's. It is simply...
  10. Thread: Heave Spring

    by Matt49
    Replies
    9
    Views
    1,544

    I don't think anybody really is. You look at F1...

    I don't think anybody really is. You look at F1 and they have tons of wind tunnel data and CFD at their disposal and they are still constantly making changes to the cars in the most minute ways. It...
  11. Thread: Heave Spring

    by Matt49
    Replies
    9
    Views
    1,544

    Austin34471, the biggest application I would see...

    Austin34471, the biggest application I would see for it is ease of adjustment. You could throw in spring rubbers if you were concerned about plowing the nose on a heavy track with a cushion. I...
  12. Thread: Heave Spring

    by Matt49
    Replies
    9
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    1,544

    Thanks, billet. I haven't even begun to think...

    Thanks, billet. I haven't even begun to think about how it would be designed or packaged. Obviously F1 has the benefit of the rockers and the fact that the suspension is symmetrical makes it...
  13. Thread: Heave Spring

    by Matt49
    Replies
    9
    Views
    1,544

    Heave Spring

    Since everybody seems to be sitting around watching it rain, I thought I would go way outside the box here.
    I realize many rules packages would not allow for this but wondering if anybody has...
  14. Replies
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    2,105

    The overarching point here should be: All that...

    The overarching point here should be:
    All that data in the world is of no use if you don't have the ability to gain knowledge from it by first converting it to information.
  15. Replies
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    2,515

    The bars starting parallel will only result in no...

    The bars starting parallel will only result in no rotation/indexing if the bars are the exact same length...which is rarely if not never the case. Not sure if that was implied somewhere that I...
  16. Replies
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    892

    https://www.speedwaymotors.com/Longacre-52-44467-A...

    https://www.speedwaymotors.com/Longacre-52-44467-AccuTech-SMi-Alum-4-Gauge-Panel-OP-WT-OT-FP,126806.html
  17. Thread: Body

    by Matt49
    Replies
    5
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    1,855

    Not to discredit any of the people already...

    Not to discredit any of the people already referenced...I'm sure they do great work...but I think this question will elicit a lot more responses if you post it on the tech section.
  18. Replies
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    1,201

    We can't attach Excel files on 4m and I'm not...

    We can't attach Excel files on 4m and I'm not going to offer to email you what I use or I'm going to get a flood of requests from other people and I'm not running a free consulting business :-) ...
  19. Replies
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    1,201

    Are you just talking about a sheet that will...

    Are you just talking about a sheet that will create a graph once you have entered the load numbers at specific travel distances?
  20. Thread: Bump stops

    by Matt49
    Replies
    19
    Views
    2,936

    Watching the touring guys it appears that all of...

    Watching the touring guys it appears that all of them are basically on the verge of a throttle push when they launch really hard off the corner. Especially if they happen to under-rotate the entry. ...
  21. Thread: Bump stops

    by Matt49
    Replies
    19
    Views
    2,936

    Kinda. But you have to be able to keep it there....

    Kinda. But you have to be able to keep it there. As soon as you unload off the bump, your dynamic wedge falls off a cliff. And to billet's point, that's where "forward bite" is coming from.
  22. Thread: Bump stops

    by Matt49
    Replies
    19
    Views
    2,936

    The first thing you need to know is whether or...

    The first thing you need to know is whether or not you're getting on the bump at all in the first place. So you need a travel indicator for starters.
  23. Thread: Bert atf

    by Matt49
    Replies
    15
    Views
    1,679

    An added point to that is that you are far better...

    An added point to that is that you are far better off having your RPMs too high for the downshift than too low, so I intentionally rev past what I think is good to make sure of that. If you engage...
  24. Replies
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    Front ride heights depend on whether or not you...

    Front ride heights depend on whether or not you have the old style front end parts or the S7 stuff. With old style stuff, it is 3-7/8 LF and 3-3/4 RF. If you have S7 stuff, it is 3-1/2 both sides. ...
  25. Thread: J-Bar Theory

    by Matt49
    Replies
    45
    Views
    8,711

    Now you've really got me thinking! Maybe my left...

    Now you've really got me thinking! Maybe my left side tether needs to weigh WAY more than my right side tether. Ha ha
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