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1592 for Racing

Discussion in 'Rootes Racing' started by jdoclogan, Apr 20, 2020.

  1. alpine_64

    alpine_64 Donation Time

  2. Eleven

    Eleven Gold Level Sponsor

    Thank you. I did not know the earlier engines ran dished pistons. I have an SV with flat. Interesting thread, BTW
     
  3. alpine_64

    alpine_64 Donation Time

    The SV all had dished pistons as well in stock form. The 1725 piston while hsving the same bore as a 1592 has a larger dish to control rhe compression. It was a 7.5cc dish iirc
     
  4. Eleven

    Eleven Gold Level Sponsor

    So mine was rebuilt at some point?
    I am starting a new thread on gasoline in Stock Alpine, I hope you can answer some questions for me. This is more interesting now!
     
  5. spmdr

    spmdr Donation Time

    I have been casually looking through my STUFF, for a piston that came out of an Alpine engine from England.

    This piston fits the the "New school" concept of having a smaller pin.

    The smaller pin lets you have a longer rod, a shorter piston and less reciprocating weight.

    I'll find that piston eventually, in the mean time just use your imagination of a piston with a WAY smaller pin.

    ...even though it doesn't take full advantage of a longer rod...

    DW
     
  6. spmdr

    spmdr Donation Time

    I found the piston.

    The picture has a stock Alpine piston on the left.

    The center piston is forged, for use with a Chevy rod/pin.

    The right piston is used with a custom/GT6 rod with a .866 pin.

    You can see there is Real Estate above the pin hole to move the pin up,

    with a longer rod.

    And/or a yet smaller pin.

    IMG_20200723_083606794.jpg
     
    Last edited: Dec 2, 2020
  7. RootesRooter

    RootesRooter Platinum Level Sponsor

    So you have flattops in your Series V? I don't remember your head having been shaved much, if any. If there's any hint of pinging, better back the timing off and/or start running supreme in it.
     
  8. Eleven

    Eleven Gold Level Sponsor

    Dick, it does knock. I filled it with Supreme a bit ago but am concerned about the alcohol. I have a source of non alc gas but the octane is in the low '80's. I bought some octane booster but the instructions are not helpful: "Treats 24 gallons of gas. Pour the entire bottle into the tank before refill". Who has a 24 gallon tank? I have 6 gallons of room plus the 2ish that is in there. I guess I will have to try and scope out what 1/3rd of a bottle looks like. Helpfully, it has a very attractive multi-curve shape... I also got some alcohol treatment that is supposed to help protect against the bad stuff alc does.
    I have the timing backed off a bit but don't want to go any more. Car is running great for the first time. We should take this off line, a little off topic.
     

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