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  1. #1
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    Default combustion chamber measuring cc What do u use ????

    HI
    Looking to measure reliably /accurately combustion chamber / valve reliefs etc Need accuracy under .5 cc . Like all of us I have used syringes in the past but a little hit and miss .Want to go semi pro if I can eg plastic buret with tap and clamp . If price is right stand . Glass units seem $$. To get around plastic/ rubber reacting with eng oil use cooking oil and clean up in the dish wash .


    What`s every body using ????????????

  2. #2
    Do you ever leave? EH179's Avatar
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    Engine oil/cooking oil????

    Try water or brake fluid...fills the cavity much easier.

  3. #3
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    hi

    What tool is everyone using .????????
    Where did u get yours from ????

    NOT talkin about the fluid ha ha Shouldn`t have mentioned it .

  4. #4
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    Hi Swampy. VPW should be able to help you out for a burette etc..

  5. #5
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    Yeah think I scored a glass one on fleabay. Iíve heard metho with food dye for fluid. Water has a greater surface tension so it will bulge before spilling. If that makes sense. Oil will as well.


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  6. #6
    Do you ever leave? EH179's Avatar
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    Quote Originally Posted by Castiron355 View Post
    Yeah think I scored a glass one on fleabay. I’ve heard metho with food dye for fluid. Water has a greater surface tension so it will bulge before spilling. If that makes sense. Oil will as well.


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    Under a sealed perspex sheet??? you haven,t done this too often ay?

  7. #7
    Do you ever leave? EH179's Avatar
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    Quote Originally Posted by swampy View Post
    HI
    Looking to measure reliably /accurately combustion chamber / valve reliefs etc Need accuracy under .5 cc . Like all of us I have used syringes in the past but a little hit and miss .Want to go semi pro if I can eg plastic buret with tap and clamp . If price is right stand . Glass units seem $$. To get around plastic/ rubber reacting with eng oil use cooking oil and clean up in the dish wash .


    What`s every body using ????????????
    You going for a National record or EMC ?

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    Hahaha!! Whoops.


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  9. #9
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    Water with colour. Polycarbonate sheet, grease to seal around the chamber and two syringes.

    A fancy burette is good if you can't count or you do it for a living.

  10. #10
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    You can buy a Class B Burette 100cc for under $100...

    You can also get syringes for cheaper, if you are off 1 cc who really cares...

  11. #11
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    Hi
    Trying to stay at 10.7 CR

    Already machining a lot of the heads ,want to keep to a moderate amount .030 flat mill from memory=70cc comp chamber
    .006 thou per CC 60thou max ,,,,then u can angle mill
    ***Main concern is piston maker said valve reliefs canbe 4.5--7cc 5 being the target

    https://www.ebay.ca/itm/Plastic-Bure...P2r3TEqaxxV_pg

    https://www.ebay.com.au/itm/Plastic-...4AAOSwYeNbFzmb

    Just need a bit of round bar welded to a base plate
    Last edited by swampy; 19-05-2019 at 09:11 AM.

  12. #12
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    You are way more fussy than me... 10.5-11 anywhere between that I'd call it good ... You can be accurate enough with syringes..

  13. #13
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    I use a graduated cylinder. I presume you are using a perspex plate over the chamber. Just pour the liquid in. I use Turps or Kero; I add a little ATF for colouring, easier to read. Your chemist should be able to get a GC for you. Mine is glass, graduated to 100cc, but will take 150+ cc.

  14. #14
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    I use radiator coolant (bright green, and low surface tension).
    I also subscribe to the 'within 1cc' togic.
    Not sure how much extra fits in the fill hole in the plate, or how far off of the surface the plate sits with the thin smear of vaso to seal.
    My burette I think is 100cc cheapy

  15. #15
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    Quote Originally Posted by Deuce. View Post
    I use radiator coolant (bright green, and low surface tension).
    I also subscribe to the 'within 1cc' togic.
    Not sure how much extra fits in the fill hole in the plate, or how far off of the surface the plate sits with the thin smear of vaso to seal.
    My burette I think is 100cc cheapy
    Only the chamber is cc'ed... People sometimes forget to do the crevice volume, or top of the piston to the 1st ring land in the bore, there is 1cc there... Also they read the manufacturers statement for relief clearance cc...

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