The official what I'm doing/changing for the 08 season thread - Page 3
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This is a discussion on The official what I'm doing/changing for the 08 season thread within the Motorsports Talk forums, part of the Community - Meet other Enthusiasts category; Originally Posted by drummerboy Planning on full suspension setup: Coilover setup around the 400/350 or 350/300 (RCE Tarmac 2s are ...

  1. #31
    Registered User Pzary3233's Avatar
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    Quote Originally Posted by drummerboy View Post
    Planning on full suspension setup:
    Coilover setup around the 400/350 or 350/300 (RCE Tarmac 2s are a strong possibility)
    I ALMOST decided to go the RCE Tarmac 2 Route! They look like a very well thought out product.

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  3. #32
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by Big Sky WRX View Post

    Setup wise I have some big changes I'm planning on - I'm going to move up to 17" rims...................
    check thanks JR

    I'm keeping a close eye on TIC's work w/ AST- the dynos look very promising, lots of travel- so far everything has been very well thought out
    "Simplify and add lightness." - Colin Chapman

  4. #33
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by Pzary3233 View Post
    Suspension Changes:
    Koni inserts with D_Rex spacers
    GC Adj Springs with 450# springs front and rear
    Those are very close to the rates I'm shooting for as well- after looking closely at the Koni dynos I can assure you that they will handle those rates w/o any problem
    "Simplify and add lightness." - Colin Chapman

  5. #34
    Registered User wrx wagone's Avatar
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    You guys will have cushy suspension.
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  6. #35
    Registered User Pzary3233's Avatar
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    Yeah? And that frequency ratio deal... Do you have a link to that big sky?

  7. #36
    Registered User digitalseance's Avatar
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    I hope to do the Evo school, depends on timing and funds (like everything else)

    1. Buy a trailer (car hauler)
    2. Make up my mind on either 17x9.5 or 16x8 wheels (currently on 17x7.5 w/ 245s)
    3. Buy wheels
    4. Buy 275/xx/xx hoosiers
    5. purchase 30 gals of VP Import and new tune by Jorge
    6. Upgrade to 14k/12k springs
    7. Design new website (current one is WAY too lame)
    8. Place top 5 PAX at Subie Challenge (got 8th last year)
    9. Attend 5 GASS events and 3 National Tours
    10. Attend nationals and place top 10 in ESP
    11. Do my best to save my local region from extinction due to new temp membership fees and split of local autox club from local SCCA.
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  8. #37
    Moderating on the run! Big Sky WRX's Avatar
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    compared to the rates that JR is looking at- 450 ft lbs will be like stock

    this entire site is full of good "techy" info on autoxing

    http://farnorthracing.com/autocross_secrets.html
    "Simplify and add lightness." - Colin Chapman

  9. #38
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by digitalseance View Post
    I hope to do the Evo school, depends on timing and funds (like everything else)

    1. Buy a trailer (car hauler)
    2. Make up my mind on either 17x9.5 or 16x8 wheels (currently on 17x7.5 w/ 245s)
    3. Buy wheels
    4. Buy 275/xx/xx hoosiers
    5. purchase 30 gals of VP Import and new tune by Jorge
    6. Upgrade to 14k/12k springs
    7. Design new website (current one is WAY too lame)
    8. Place top 5 PAX at Subie Challenge (got 8th last year)
    9. Attend 5 GASS events and 3 National Tours
    10. Attend nationals and place top 10 in ESP
    11. Do my best to save my local region from extinction due to new temp membership fees and split of local autox club from local SCCA.
    if you do 6., you will almost certainly need 1.

    those are some serious spring rates, those I believe are even higher than JR is considering
    "Simplify and add lightness." - Colin Chapman

  10. #39
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by Big Sky WRX View Post
    those are some serious spring rates, those I believe are even higher than JR is considering
    Yes they are, not by a whole lot.

    With all that money you're dumping into things, you better get a top ten.
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  11. #40
    Registered User digitalseance's Avatar
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    Quote Originally Posted by wrx wagone View Post
    With all that money you're dumping into things, you better get a top ten.
    You have no idea. I'll be selling off my tire trailer once I get the car hauler. I bought an SUV to start towing with and to daily drive so I left that off the list, but it might as well be on it since I'll be paying for it over the next 4 years!

    I hope 30gals of VP Import will be enough for the year. I run about 18 weekends (both sat and sun) a year. That stuff is uber expensive.

    OH, and remove AC, stereo and all associated components, get a cheap lightweight racing seat for the passenger side, and over the winter I (myself) must loose weight. I promised myself that for every pound I loose, the car can loose to double the weight savings. I hope I'm dedicated enough to do it b/c jogging in -20* sucks...
    Last edited by digitalseance; 11-30-2007 at 12:07 PM.
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  12. #41
    Registered User drummerboy's Avatar
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    Quote Originally Posted by Pzary3233 View Post
    I ALMOST decided to go the RCE Tarmac 2 Route! They look like a very well thought out product.
    The only real concern I'm having is using this setup in winter... I'm not up to swapping back stock struts in the winter (its a pretty common practice up here) since I'm not sure how corrosion resistant they are despite them being stainless, or how the threads would handle anti-corrosion sprays (another thing other people do instead of swapping). I plan on talking with racecomp about this.

    I almost forgot...
    stainless brake lines... definitely would like those too

    Quote Originally Posted by Big Sky WRX View Post
    this entire site is full of good "techy" info on autoxing

    http://farnorthracing.com/autocross_secrets.html
    great link
    Last edited by drummerboy; 11-30-2007 at 04:15 PM.
    2006 WRX - World Rally Blue

  13. #42
    Registered User wrx wagone's Avatar
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    Posting this over here too:


    I still need to make this thread over here, but anywho, here are my thoughts on car setup. All of this is based on Vehicle Dynamics and weight transfer.

    In vehicle dynamics you can control the following things:

    1. Pitch
    2. Roll
    3. Yaw

    Ultimately you control pitch and roll to effect the weight transfer to produce the desired yaw.

    When tuning suspension you can control these components and the dynamics they control:

    1. Swaybars - Only control Roll
    2. Springs - Control Pitch and Roll
    3. Dampers - Control rate of change in Pitch and Roll

    This leads me to the following conclusions:

    1. Since you can only control Pitch with springs, you need to tune your springs to effect changes in the way the car enters and exits corners.

    ex. If your car nose dives into corners you need to add stiffer front springs, and if the rear end squats under acceleration add stiffer rear springs.

    Stiff rear springs should be especially important as they will keep weight from transferring rearward during acceleration on corner exit. This will keep weight on the front end so the car doesn't understeer on exit.

    2. Once you have your springs sorted you can then fine tune your roll stiffness with your swaybars. The stiffer springs you installed in step 1 will add roll stiffness to the car this may or may not be enough to complete your setup. You must now adjust your swaybars to achieve the desired amount of roll. The swaybars will influence the dynamics of the car IN a corner under steady-state conditions.

    I would first start with the front end. Through trial and error, find the swaybar setting that provides the largest amount of front grip. Set it there and basically leave it alone! Next, go back to the rear end of the car and dial in rotation with swaybar stiffness. I very much use this to tune my car for different surfaces, courses, etc.

    3. Final step! Tune the dampers to control the dynamics of the car in transitions.

    You will very much need to adjust this based on conditions and course layout. This area from what I've seen has the most "rules of thumb" and "old racers tales" associated with it. This is the really where suspension tuning becomes a black art of sorts. I still have much to learn in this area. This is a very interesting read:

    http://www.ozebiz.com.au/racetech/th...hocktune1.html

    I would still recommend that the driver experiments with damper settings and tunes the car to his/her liking.
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  14. #43
    Registered User drummerboy's Avatar
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    ^ good points to consider ...

    I'm actually thinking of running a couple of auto-x's with just the stock sways after I do springs & dampers to get a better idea on what swaybar size/adjustment I would need so I don't over/under-estimate the size to get.
    2006 WRX - World Rally Blue

  15. #44
    Registered User wrx wagone's Avatar
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    Unless you are going with springs stiffer than 400 lb.in or so, just the biggest front bar you can find and then dial the rear one to suit.
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  16. #45
    Registered User Pzary3233's Avatar
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    Quote Originally Posted by drummerboy View Post
    The only real concern I'm having is using this setup in winter... I'm not up to swapping back stock struts in the winter (its a pretty common practice up here) since I'm not sure how corrosion resistant they are despite them being stainless, or how the threads would handle anti-corrosion sprays (another thing other people do instead of swapping). I plan on talking with racecomp about this.
    Interesting point... but I'm down south where we take one month off from racing for the holidays.

    WRX Wagone,

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