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Thread: cylinder compression 3.5l 9.35:1

  1. 4th October 2013, 02:59 PM #11
    Davo
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    Quote Originally Posted by Jazzman View Post
    I love that i asked a simple question and get such a complex and comprehensive answer.
    This is AULRO, after all. Just count yourself lucky it didn't degenerate into a discussion involving K&N filters and how the country is going down the gurgler and we'll all be rooined.

    Anyway, for a high mileage like yours I'd say that's pretty much okay. BUT, this is an engine that's likely to be on its way out, given how they go through camshafts.
    At any given point in time, somewhere in the world someone is working on a Land-Rover.
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  2. 4th October 2013, 03:25 PM #12
    BathurstTom
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    Did anyone mention volumetric efficiency?
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  3. 4th October 2013, 06:07 PM #13
    Jazzman
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    That is what i figured. I plan on measuring cam lift this weekend.

    Quote Originally Posted by Davo View Post
    This is AULRO, after all. Just count yourself lucky it didn't degenerate into a discussion involving K&N filters and how the country is going down the gurgler and we'll all be rooined.

    Anyway, for a high mileage like yours I'd say that's pretty much okay. BUT, this is an engine that's likely to be on its way out, given how they go through camshafts.
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  4. 4th October 2013, 09:25 PM #14
    Collins
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    Volumetric Efficiecy

    Quote Originally Posted by BathurstTom View Post
    Did anyone mention volumetric efficiency?
    Actually, if you plug the figures in to a VE calculator the 4.0 l V8 comes up quite well.
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  5. 4th October 2013, 09:35 PM #15
    Davo
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    Where's 400HPONGAS when you need him to curse the inefficiency of Rover heads???
    Last edited by Davo; 4th October 2013 at 09:39 PM. Reason: 'Coz
    At any given point in time, somewhere in the world someone is working on a Land-Rover.
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  6. 4th October 2013, 09:45 PM #16
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    101RRS
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    Quote Originally Posted by Davo View Post
    Where's 400HPONGAS when you need him
    The last I heard (Apr 12) he had major health issues and was no longer able to come online.
    REMLR 243

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  7. 4th October 2013, 10:16 PM #17
    Davo
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    Well, sorry to hear that.
    At any given point in time, somewhere in the world someone is working on a Land-Rover.
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  8. 4th October 2013, 10:20 PM #18
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    cdbanks
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    I am going to call bad calibration on the gauge for the high compression readings. To get that high of a comp' test without any modifications, something is amiss.

    EDIT: This is in regards to the 170-185.
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  9. 5th October 2013, 06:22 AM #19
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    Blknight.aus
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    I always use compression ratio *15 to get my minimum acceptable pressure for an engine that's been run for a couple of minutes to ensure that the rings aren't sitting cold and dry.

    Best I've ever seen out if a rover engine was 220psi but then it wasn't precisely stock or 300k km old either.

    Via the modern day equivalent to smoke signals fromsome place other than the cave where my hat hangs.
    Dave

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