Compression Test - Phil's 1964 1108cc Caravelle
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Thread: Compression Test - Phil's 1964 1108cc Caravelle

  1. #1
    Fellow Frogger! R8philSA's Avatar
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    Default Compression Test - Phil's 1964 1108cc Caravelle

    Hi fellow R8, R10, Floride and Caravelle owners.

    Just wondering if anyone can advise me of what I should expect when I carry out a Normal Operating Temperature Engine compression test, throttle wide open at the time. As far as I know it does have the 8 port head, and being fed by a downdraft twin throat Weber. Presumably the head is a standard 1108cc head and may have had a surface plane in its life before me.

    I got the following results:

    No. 1 = 180psi
    No. 2 = 172psi
    No. 3 = 172psi
    No. 4 = 180psi

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    Seems pretty good to me and I don't have an engine history record so who knows how old the rings and pistons are!

    Cheers guys
    Phil
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    Fellow Frogger! bingham driver's Avatar
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    Hi Phil, a pretty damn good result in my book. A drop of 20psi in any cylinder usually means inspection time, but I wouldn't be concerned with a 8psi difference. Sounds like a very satisfactory result.
    Once I thought I was wrong but, I was mistaken

  3. #3
    COL
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    Looks Good to me too.
    Regards Col

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    1000+ Posts renault8&10's Avatar
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    Third that. High, consistent across the board.
    Nothing to worry about there I think.
    KB


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    Those numbers look good. Last December, did a compression test on the R8G motor in my A110 (warm motor with throttle wide open) and got the following results :readings in psi: No 1 cylinder =190; No 2 = 205; No 3 = 210 and No 4 = 195.

    Just done a compression test on my rebuilt Fuego Turbo motor (type 341 motor as used in the R18) and bearing in mind the motor is not run in yet: No. 1 cylinder 145 psi, No 2 145, No 3 150 and No 4 140.

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    1000+ Posts alan moore's Avatar
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    Barry,
    You would be likely to have the lower figures in the Fuego Turbo given its lower compression ratio. 150Psi would be quite usual, where your R8G motor is probably closer to 10.5 to 1 and will see 200Psi depending on the cam fitted.
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    Hi Alan

    I thought as much. The R8g motor doesn't have a hot cam as yet but I do have one to go in later.

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    Thanks to everybody that has commented. I thought as much.
    Hmmm. So I won't be rushing to rip the head of. Shame !!! I love doing work on the engine, tis in my blood.
    Cheers
    Phil
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    COL
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    Quote Originally Posted by R8philSA View Post
    Thanks to everybody that has commented. I thought as much.
    Hmmm. So I won't be rushing to rip the head of. Shame !!! I love doing work on the engine, tis in my blood.
    Cheers
    Phil
    Phil spend your time gapping the plugs, setting the points/timing and tweeking the carbie to make her run silky smooth.
    Regards Col

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    A head retention and resetting valve clearance wouldn't hurt.
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    Fellow Frogger! R8philSA's Avatar
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    Already done a full tune up Col. Everything that could be done including full valve clearance check has been done.
    She purrs like a kitten and runs like clockwork. Lovely and smooth on the road, great suspension. Love her to bits. It's actually the wifes car and she raves over it.
    Cheers
    phil
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    VIP Sponsor 59 Floride's Avatar
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    Quote Originally Posted by R8philSA View Post
    Already done a full tune up Col. Everything that could be done including full valve clearance check has been done.
    She purrs like a kitten and runs like clockwork. Lovely and smooth on the road, great suspension. Love her to bits. It's actually the wifes car and she raves over it.
    Cheers
    phil
    Can't wait to see her at Forbes 2015. These cars are a real treat to drive when fully sorted and everything works well.

    It's taken me ages to fine tune my Floride and get all the mechanical upgrades sorted. My car isn't anywhere near standard but was a good car to learn on. Today I took her out for a good fang without the roof and was mesmerized by the sound of the dual throat weber and tuned extractors...

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    Quote Originally Posted by 59 Floride View Post
    Can't wait to see her at Forbes 2015. These cars are a real treat to drive when fully sorted and everything works well.

    It's taken me ages to fine tune my Floride and get all the mechanical upgrades sorted. My car isn't anywhere near standard but was a good car to learn on. Today I took her out for a good fang without the roof and was mesmerized by the sound of the dual throat weber and tuned extractors...
    Tell you what Graham. I can't wait for Forbes. I haven't taken the roof off yet as it's so B cold down here at the moment, BUT, Spring is coming and I don't know how that roof comes off but I'll get it of or my name ain't Phil !!
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    VIP Sponsor 59 Floride's Avatar
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    Quote Originally Posted by R8philSA View Post
    Tell you what Graham. I can't wait for Forbes. I haven't taken the roof off yet as it's so B cold down here at the moment, BUT, Spring is coming and I don't know how that roof comes off but I'll get it of or my name ain't Phil !!
    Ah do it Phil, get that roof off. I just came back from another night time fang out along the motorway and a few side roads. It's a balmy 14 degrees here at present (8 o'clock), not cold by any stretch and my old car seems to be right on song at this temperature/night time humidity.

    I had to drop into the local 7/11 to get a lemon to suck on..

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    Graham.
    How about you attach a photo of the Floride with the roof off. I love the deep blue colour in your Avatar and the white walls suit it so well. I always get a kick out of engines, any photos of the engine would be most welcomed.
    Cheers
    phil

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    VIP Sponsor 59 Floride's Avatar
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    Quote Originally Posted by 59 Floride View Post
    Wow Graham, puts mine to shame. Tell me, how do you get all those great photos into the aussiefrogs album ??
    Cheers
    Phil

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    Very pretty Floride but Phil, your Caravelle is the nicest one I have seen for many a year. Tidy, clean and original. Great car
    regards
    Chopper Bob

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    Quote Originally Posted by Chopper Bob View Post
    Very pretty Floride but Phil, your Caravelle is the nicest one I have seen for many a year. Tidy, clean and original. Great car
    regards
    Chopper Bob
    Thanks for the nice complement Bob. I just reckon Graham's blue with the white walls sets it of something special.
    Can't wait to see your R8G on the road, with the super oscars fitted, how cool will that look.
    Cheers mate
    Phil

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