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  1. #1
    Contributing Member BWC54's Avatar
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    Default Restrictor Plate Color Coding

    Anyone know the restrictor plate color coding used for other than the SCCA blue 29 mm plate?
    Crossle 32F, Piper DF5 Honda

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    Senior Member SOseth's Avatar
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    I only know of 2 restrictor colors from HPD. I think the 29 mm is blue. The restrictors used at the ARRC were gold and were 27.5 mm restrictors that QS bored out for that event.

    SteveO

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    Guys, while I do not know the colors yet, Tom Grosart at HPD is overseeing the restrictors, we will have numerous options at VIR and intend to begin the Thursday test day at 31mm with the ability to go up or down as needed.
    We will knoiw the colors of each size well in advance.

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    Contributing Member BWC54's Avatar
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    Quote Originally Posted by SOseth View Post
    I only know of 2 restrictor colors from HPD. I think the 29 mm is blue. The restrictors used at the ARRC were gold and were 27.5 mm restrictors that QS bored out for that event.

    SteveO
    Bored to 30.5 mm?
    Crossle 32F, Piper DF5 Honda

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    Senior Member Dave SanF 50's Avatar
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    Default Sorry to bring back this old thread

    Can anyone give me an update as to the restrictor sizes currently being used, by which sanctioning body and the color coding?

    Is the current size 29.5mm for SCCA Club racing?
    TIA

  6. #6
    Grand Pooh Bah Purple Frog's Avatar
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    May GCR says the Fit restrictor for club racing is 30.5 mm (i believe it is anodized gold)

    31.0 mm for pro racing (anodized silver)


  7. #7
    Senior Member Dave SanF 50's Avatar
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    thanks

  8. #8
    Contributing Member TimW's Avatar
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    Quote Originally Posted by Purple Frog View Post
    May GCR says the Fit restrictor for club racing is 30.5 mm (i believe it is anodized gold)

    31.0 mm for pro racing (anodized silver)

    I think the 30.5 is anodized bronze. The gold was the original 27.0 (of which some where opened to 30.5 for the 2010 ARRC and are not legal at any other event. I believe the GCR states the restrictor must be run as delivered by HPD, of which those 4-6 restrictors no longer comply).

    Tim
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  9. #9
    Senior Member Dave SanF 50's Avatar
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    Quote Originally Posted by TimW View Post
    I think the 30.5 is anodized bronze. The gold was the original 27.0 (of which some where opened to 30.5 for the 2010 ARRC and are not legal at any other event. I believe the GCR states the restrictor must be run as delivered by HPD, of which those 4-6 restrictors no longer comply).

    Tim
    Now I'm confused. Does this mean the early adapters are SOL and must runthe smaller restrictors their engines came with?-that does not make sense even for SCCA
    Last edited by Dave SanF 50; 04.30.12 at 2:40 PM. Reason: added a "the"

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    Dave you're reading to far into it. It just means your can't mill out an old smaller restrictor to the new size even if it matches perfectly. You need to buy the part that is the right size from HPD and run it unaltered.
    Mark Swick

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    Contributing Member TimW's Avatar
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    Quote Originally Posted by fezzic181 View Post
    Dave you're reading to far into it. It just means your can't mill out an old smaller restrictor to the new size even if it matches perfectly. You need to buy the part that is the right size from HPD and run it unaltered.
    Correct. The restrictor is simply a plate that sandwiches between the throttle body and the manifold. It is easily replaceable. It is not alterable...
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  12. #12
    Senior Member Dave SanF 50's Avatar
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    Default I must be reading too much into this again

    Quote Originally Posted by TimW View Post
    Correct. The restrictor is simply a plate that sandwiches between the throttle body and the manifold. It is easily replaceable. It is not alterable...
    WOW, what kind of material are manufactured from so they are not alterable?
    Or did you mean to state that the rules do not allow them to be altered? I'm just teasing you Tim

  13. #13
    Contributing Member Steve Demeter's Avatar
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    Unobtanium

  14. #14
    Contributing Member TimW's Avatar
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    Quote Originally Posted by Dave SanF 50 View Post
    WOW, what kind of material are manufactured from so they are not alterable?
    Or did you mean to state that the rules do not allow them to be altered? I'm just teasing you Tim
    Jeez Dave, are you a freaken professor making me defend a thesis? Its made from ally, its anodized. If the anodizing is altered and the HPD inscripted codes are not present, its not legal. yes, you can alter the restrictor, but then you would be cheating if you use it, even if it is the right size. Ok? Do your want GCR reference sections delineated?

    I can't believe what SFR guys do to freaken run regionals around here. I thought it was a hobby, not trying to catch the other guy out as a cheater or assume he is cheating to win a stupid regional. Last I checked, the runoffs are not at Sears or Laguna. I feel sorry for anyone who has to cheat at a regional and frankly a little frightened that there is such high suspicion of it for a regional.
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  15. #15
    Senior Member Dave SanF 50's Avatar
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    Default "I'm just teasing you Tim"

    Quote Originally Posted by Dave SanF 50 View Post
    WOW, what kind of material are manufactured from so they are not alterable?
    Or did you mean to state that the rules do not allow them to be altered? I'm just teasing you Tim

    Tim-I stated that my comment was in jest. I am sorry you took it the wrong way. I always assume all the guys I race with are decent guys. I have never protested anyone or accused anyone of cheating. I am sorry you took my remarks as trying to stir up trouble.

    I know nothing about the Honda engine except that it is in my class and I am trying to learn something so I can at least ask intelligent questions.
    Last edited by Dave SanF 50; 04.30.12 at 10:06 PM. Reason: added "to"

  16. #16
    Contributing Member TimW's Avatar
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    Quote Originally Posted by Dave SanF 50 View Post
    Tim-I stated that my comment was in jest. I am sorry you took it the wrong way. I always assume all the guys I race with are decent guys. I have never protested anyone or accused anyone of cheating. I am sorry you took my remarks as trying to stir up trouble.

    I know nothing about the Honda engine except that it is in my class and I am trying to learn something so I can at least ask intelligent questions.
    Dave: You're welcome to come for a look see at any event and ask all the questions you want. Yes, I realize I haven't been able to be at an event recently to allow that, but I'll be at Laguna in June. Or if you need a look see sooner, I have cold Santa Cruz Mountain Brewery stocked and its walking distance to their place if we run out.

    Everyone knows someone who loves a Honda. So they say.
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  17. #17
    Senior Member Dave SanF 50's Avatar
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    The cold Santa Cruz brews sound great! Thanks for the offer.

    I was hoping to be at Laguna for the next double, but it is my nephew's HS graduation weekend. And, as my wife reminds me, he is my only nephew AND I went to his sisters graduation so to be fair I should attend his. So my entry is in question that weekend.
    I may be able to miss the first race and just come to qualify and run the second race.

    Can you bring the Santa Cruz Brew? I'll be sure to be there.

  18. #18
    Member hpdinsider's Avatar
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    Default HPD L15A7 Restrictor Color Coding

    [FONT=Arial]Hello FF Racers,[/FONT]

    [FONT=Arial]Here is an HPD L15A7 restrictor plate guide.[/FONT]



    [FONT=Arial]Enjoy and good luck to you all this season.[/FONT]
    Last edited by hpdinsider; 05.11.12 at 1:52 PM.
    Passion + Innovation = Success
    Honda Performance Development (HPD) is Honda’s racing company within North America. In addition to its new grassroots motorsports initiative, HPD is the single engine supplier to the IndyCar Series and competes in prototype sports-car racing under the Acura banner in the American Le Mans Series.

  19. #19
    Contributing Member TimW's Avatar
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    Wow, kudo's to our northerly neighbors for going straight to 31.0mm.
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    JK 1964-1996 #25

  20. #20
    Contributing Member problemchild's Avatar
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    Not sure where you got your info, but Ontario is starting with 30.5 mm restrictors, and I believe Quebec is as well. There will be 6 active Hondas in Ontario this year. Kents won the first two races with Hondas 2nd in one and 3rd in the other.

    If you were referring to Washington or Oregon ..... Nevermind.
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  21. #21
    Classifieds Super License stonebridge20's Avatar
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    [QUOTE]
    Quote Originally Posted by problemchild View Post
    Not sure where you got your info,
    Greg, The PDF file above has mysteriously changed in the past hour. There's different info on there than an hour ago.
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  22. #22
    Contributing Member problemchild's Avatar
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    OK.
    All in all, the infusion of FIT cars seems well-received. While perhaps not equal at 30.5, its certainly worth bringing a car out to race. Getting the part-time and casual racers out is proving to be the difficult part, as it was last year, when entries fell off dramatically. The new Toyo tire package should help that.
    Greg Rice, RICERACEPREP.com
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  23. #23
    Senior Member rmccown's Avatar
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    [QUOTE=stonebridge20;344323]


    Greg, The PDF file above has mysteriously changed in the past hour. There's different info on there than an hour ago.

    Bob McCown
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  24. #24
    Contributing Member TimW's Avatar
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    Quote Originally Posted by rmccown View Post

    No, there was a PDF that listed sizes, colors and then where each is used. It now only lists sizes and colors. The hpd post was edited about the same time my post was submitted, and obviosly to me with a different attachment. Which is fine, as the where used can become stale and lead to misinformation down the road.
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  25. #25
    Classifieds Super License Skelly's Avatar
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    Default Fit restrictor size

    I just pick up my Fit kit for my 99 VD on Friday. I think the color of my restrictor is gold in color, and has 30.5 stamped on it. I will reopen the box and check in a few days. Wilkl start send ing in pics as the kit in being installed. Really looking forward to next year..

    Sean Kelly
    99 VD Honda
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