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Ok, need advice. Next week is my first race....help me be prepared!

  1. #26
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by Rada View Post
    Only the caps need to be metal.
    What is the theory behind this?

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  2. #27
    Rookie Rada's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Legend has it that the caps can melt....
    I don't buy it but the shiny metal caps are easier to find when they fall on the floor.. Lol

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  3. #28
    Is this thing on? Mr. Kurtz's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Metal caps have an o ring in them that can prevent air loss in the case of a valve core failure.

    Everyone said all the good stuff.

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  4. #29

    Re: Ok, need advice. Next week is my first race....help me be prepared!

    I have most def passed inspection and raced with no caps at all. Lol

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  5. #30
    Lifer union's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by tsorfas View Post
    I have most def passed inspection and raced with no caps at all. Lol
    Thats nothing. I know a bike that got passed with no pinch bolts in the upper triple clamp. Instead there were zip ties through the holes that were holding the number plate on. Some stuff they look for and other things they don't.

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    James

  6. #31
    Get Weird! maxim_X's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    See you there. You'll have no trouble. Ask about the rookie garage. It was all fucked up for me, but maybe you'll have better luck.

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  7. #32
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    I will be posting up personal gear soon. Helmet (L) with eject system. Spyder 48/58 Silver Suit. Suit drying hanger and trailer travel heavy duty hanger. The very best Spyder boots. Gloves (L). Chest and back protector. And a carry bag and spare stuff. Rookie gets first shot. 508 713 5663

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  8. #33
    Is this thing on? Mr. Kurtz's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Make sure you swing by the RSP garage and say hi(Center garages, nearest the pre-grid), and like Adam said, definitely don't miss the BBQ Sat night after the trophy ceremony.

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  9. #34
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by union View Post
    Thats nothing. I know a bike that got passed with no pinch bolts in the upper triple clamp. Instead there were zip ties through the holes that were holding the number plate on. Some stuff they look for and other things they don't.
    Oh god, I remember that..... wasn't that Kid? Or DDK?

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    Last edited by OreoGaborio; 08-24-14 at 06:43 AM.
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  10. #35
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by Rambunctous View Post
    I will be posting up personal gear soon. Helmet (L) with eject system. Spyder 48/58 Silver Suit. Suit drying hanger and trailer travel heavy duty hanger. The very best Spyder boots. Gloves (L). Chest and back protector. And a carry bag and spare stuff. Rookie gets first shot. 508 713 5663
    Thanks buddy! I'm all good with gear

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    Johnny

    Its an Italian bike...Ive had (have?) a few

  11. #36
    Lifer union's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by OreoGaborio View Post
    Oh god, I remember that..... wasn't that Kid? Or DDK?
    I wont say names but you need a nice rack to do it I used to get failed for having clips on my rear axle nut.

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    James

  12. #37

    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by Rambunctous View Post
    I will be posting up personal gear soon. Helmet (L) with eject system. Spyder 48/58 Silver Suit. Suit drying hanger and trailer travel heavy duty hanger. The very best Spyder boots. Gloves (L). Chest and back protector. And a carry bag and spare stuff. Rookie gets first shot. 508 713 5663
    You can PM me about the suit hangers

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  13. #38
    Unsafe At Any Speeds Jim's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    See if you can pit with Sam in N12. We're all around to help

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  14. #39
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by Mr. Kurtz View Post
    Metal caps have an o ring in them that can prevent air loss in the case of a valve core failure.

    Everyone said all the good stuff.
    Mike is absolutely correct.... but…. it may not be obvious as to one key reason why....

    Q. Why would I lose air pressure without a sealing valve cap?
    A. Due to centrifugal force opening the poppet valve in valve stems.

    I just calculated the how and why.
    Turns out the poppet valve opening can happen around 130 MPH due to centrifugal force on a straight valve stem (90o valve stem is a non issue).
    (Even at NHMS the fastest racers get to approx. 137-143mph down the straight (I measured with a radar gun some time back).

    I took into account numerous factors (including the obvious such as wheel speed/RPM, radius to valve stem etc to factor G forces) such as:
    -Weight of valve poppet and valve spring -
    -G force acting on poppet valve at various speeds (at 200mph there is 1600G force trying to open the valve)
    - Mechanical force (spring) required to open poppet = approx. 400grams
    - Internal tire pressure keeping the poppet valve closed of 30psi
    - Took into account pressure drop at inner rim surface due to centrifugal force on captured air.
    - Diam of poppet surface (0.090") exposed to internal it pressure (turns out the air pressure keeping the poppet valve closed it a lot less than you may think).

    So that’s why it’s important, a simple metal sealing valve cap is your last line of defense to losing air pressure.

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    Last edited by xsiliconkid; 08-25-14 at 09:59 AM. Reason: correction 0.09" not 0.9"
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  15. #40
    Lifer
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Today I was servicing the chain and tires on my street bike. I noticed the plastic OE caps on my valve stems have o-rings in them.

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  16. #41
    Lifer union's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by nhbubba View Post
    Today I was servicing the chain and tires on my street bike. I noticed the plastic OE caps on my valve stems have o-rings in them.
    I'm sure it has something to do with durability too. I probably check my pressures 10 times a weekend. How long do you think a plastic thread will last compared to a metal one?

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    James

  17. #42
    Lifer jasnmar's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    http://www.amazon.com/Set-Bullet-Val.../dp/B009C9PA96

    Metal

    Am I going to get grief from tech for anything here?

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  18. #43

    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Love how the official clarified everything about the topic and people still developing theories

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  19. #44
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Quote Originally Posted by jasnmar View Post
    http://www.amazon.com/Set-Bullet-Val.../dp/B009C9PA96

    Metal

    Am I going to get grief from tech for anything here?
    Are you really doing a rookie weekend too? Or just being a goon?

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  20. #45
    Lifer jasnmar's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    They aren't mutually exclusive .

    Last time I took the sport bike to the track, I could not complete a session without it dieing coming out of t12. I couldn't repeat the failure in the pits or running up and down the infield. It seemed to be running out of fuel. I replaced everything between the tank and the carbs, but haven't tried t12 yet.

    So far, I am signed up for the basics class.

    How that goes will determine much of the rest.

    One step at a time.

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  21. #46
    Rookie Rada's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Get The Fuck Out of here.....

    Are you shitting me.. Way to go Jason!!!!!!! You racing the CBR or the Wing?

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  22. #47
    Lifer jasnmar's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Signing up for the basics course is easy... Only a valid credit card is required.

    There are plenty of aspects of this thread which are still true.

    I'm actually still more comfortable on the wing than I am the CBR. I'm still waiting on that race class the requires factory stereos. Plans for Friday don't include the GL .

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  23. #48
    Lifer
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    This post still applies. I'm pumped for next weekend. And my candyass is just doing another track day.

    Quote Originally Posted by tsorfas View Post
    Love how the official clarified everything about the topic and people still developing theories
    No theories. Just asking questions. I am half irish and a professional inganeer by day. I'm practically designed to be a pain in the ass.

    Ultimately rules are rules. You pay to play or gtfo. Ain't even my game anyway.

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  24. #49
    Unsafe At Any Speeds Jim's Avatar
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    Re: Ok, need advice. Next week is my first race....help me be prepared!

    John, you NEED a helmet fan. Fuck what everyone else says.

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  25. #50

    Re: Ok, need advice. Next week is my first race....help me be prepared!

    Bubba I was directing anything to you. I find it super entertaining anyways

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