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  1. #1
    Mongoose's Avatar
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    Pro-Teb billett head. Which have I got?

    Hi,
    Just received a new Billett cylinder head made by Pro-Tec, bought from exact personal watercraft.
    There are no markings on it. is there a way of finding out if it is the 'rec' or 'limited' spec one without bolting it up and doing a comp test?


  2. #2
    Flying Scotsman's Avatar
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    Ask the seller or measure the dome vollume.

  3. #3
    Duke's Avatar
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    Did it come in any sort of Pro-Tec packing? 14-9495 is the rec head 14-9496 is the higher compression one. When you bought it from Exact did they specify which one it was?

  4. #4
    RAIDER RUNNER BULLRAIDER's Avatar
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    The way i do it is, you need
    1. some type of graduated cup or cylinder that has cc's on it,
    2. a piece of thick maybe 1/2 inch plexiglass about the size of the one cylinder with a small hole drilled in the middle
    3. a syringe or a device to inject the water into the head through the hole

    but most all the machine shops will do a cc check real cheap. it is money well spent...

  5. #5
    Mongoose's Avatar
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    No,Exact didn't say(Even thogh I did ask).
    I think I've ****** up!
    It 'looks' as if it's the limited one!
    The transition from the deck area to the combustion chamber has no lip there at all, and looking at the Pro-Tec catalouge, the rec one does have a definite lip!
    A well, anybody need a Limited Pro-Tec head??

  6. #6
    Old Ski Insanity w/rpm500's Avatar
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    you could get close enough to determine .. roll a spark plug into the head , flip it over, get a graduated syringe,from the apothicary..(pharmacy), pull it full with an amount you know is larger than your cyylinder is, of light oil,read that #..level the head and slowly fill it with oil.. surface tension will simulate your gasket area,just fill it to the edge .. its not exact but will detirmine a large known cc spec.difference.

  7. #7
    RAIDER RUNNER BULLRAIDER's Avatar
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    Mongoose.the head i bought was 210 psi, at first.but I paid only25.00 new....they went for about 400.00, my machinist removed the same amount in the bowl untill they all read the same cc, that made it 150 psi....cost around 65.00 / 75.00 to do...

  8. #8
    Hydrotoys's Avatar
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    Did the same thing with some flat-top domes from Mel-miller for the gpr.

  9. #9
    Mongoose's Avatar
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    Quote Originally Posted by w/rpm500 View Post
    you could get close enough to determine .. roll a spark plug into the head , flip it over, get a graduated syringe,from the apothicary..(pharmacy), pull it full with an amount you know is larger than your cyylinder is, of light oil,read that #..level the head and slowly fill it with oil.. surface tension will simulate your gasket area,just fill it to the edge .. its not exact but will detirmine a large known cc spec.difference.
    Just done roughly that.
    had 2 heads side by side(stock and Pro-tec), put the plugs in and just filled with water to the head gasket level.
    Don't suppose what iv'e done is very accurate, but it is a comparison.
    Stock head 55ml
    Pro-tec 40ml
    I think ml is the same as c.c.
    Does that help to tell me wht head/comp ive got?
    Thanks.

  10. #10
    RAIDER RUNNER BULLRAIDER's Avatar
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    As a comparison yes, but not accurate enough to justify getting rid of it, have it measured ,then decide....it is the cheapest..

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