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  1. #1

    Join Date
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    Lightened stock valves

    If anyone is interested in lightening their stock valves, I have perfected the process for cutting them, including machining fixtures to properly hold them.

    I can take almost 4 grams out of an intake and 3 out of the exhaust valve. That is large percentage of a 49 gram valve!!! I do not cut the margin above the seat surface at all.

    Believe it or not, I ran lightened 2004 intake and exhaust valves in the Turbo GTI with Riva springs and Retainers at 9200 rpm all season.

    If you use early valves just make sure they are not pitted from corrosion, that is what makes them break.

    Anyway if anyone is interested, PM me. It is inexpensive to do, and adds some rpm insurance.

    It is a bad photo, right off the lathe, I polish them a bit after cutting.

    [email protected]
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    Last edited by Louis914; 09-20-2009 at 12:43 AM. Reason: none


  2. #2
    Poppa Dawg's Avatar
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    Awesome. Let me see if I can find my stock valves.

    Doug

  3. #3
    ROTAX RACING performance
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    here is a picture of our CNC lightweight stock valves. 100 % perfect
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  4. #4
    Water4fire's Avatar
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    I would assume after this is done you will need to do a valve job correct?
    As you can not just put the valves back in and all be well? I just can't see just a lap with compound being enough?

    .

  5. #5

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    novwhere
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    rpms

    Yes, great jobb from MR, but all mod you need if are you like us your engine more than 8800 rpms, else better if you buy not lightweight inconel super alloy valves and replace your stock, you will see more compression.

  6. #6
    porschemaniac's Avatar
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    What kind of price we looking at? I am building a 05 motor-just a stage 3 rec motor for grudge matches at the lake. Ive been looking at ferrodo valves for it, but you say these would be a good alternative??

  7. #7

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    Quote Originally Posted by Water4fire View Post
    I would assume after this is done you will need to do a valve job correct?
    As you can not just put the valves back in and all be well? I just can't see just a lap with compound being enough?

    .
    I do not touch the seating surface of the valve, so the valve job will depend on wether it needs it before you have them cut. If all was fine when they came out, they will go back in the same. Number them all when you take them out.

  8. #8

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    Quote Originally Posted by porschemaniac View Post
    What kind of price we looking at? I am building a 05 motor-just a stage 3 rec motor for grudge matches at the lake. Ive been looking at ferrodo valves for it, but you say these would be a good alternative??
    I personally failed 2 fererra valves, luckily caught one of them in time, it split the ex valve head like a slice of pie was cut from it. The small pie slice did not harm the head, but it killed a turbine wheel.. The other... well the head is for sale in the classifieds. Since going back to stock valves.. zero problems for me..

    As for Price, send me a pm or e-mail

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