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Author Topic: adding finger ports to sachs  (Read 2191 times)

71coltrider

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Re: adding finger ports to sachs
« Reply #15 on: January 16, 2018, 02:02:11 pm »
I thought the original mod hirths had he pistons spun around so the pins where on the exhaust side
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    Dacota25d

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    Re: adding finger ports to sachs
    « Reply #16 on: January 16, 2018, 04:09:39 pm »
    I didnt think you could do it that way. Interesting. I suppose I could move the pins to the exhaust side if i chose
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    Mario

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    Re: adding finger ports to sachs
    « Reply #17 on: January 16, 2018, 04:39:14 pm »
    Is this the proper place to discuss fingering your Sachs?! ::)

    I'm not a Sachs therapist, but I would be happy to watch your demonstration.  :)
    « Last Edit: January 16, 2018, 04:41:24 pm by Mario »
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    ajjohns

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    Re: adding finger ports to sachs
    « Reply #18 on: January 16, 2018, 06:18:15 pm »
    For the most part, your piston doesn't care which way it is orientated. Unless you have a funky top on your piston to match the profile of the head. It's all the orientation of the ring pins. JLO's are in the front because of the extra wide intake port. Most others are in the back because it's just normal port layout. As long as you have sufficient area for the ring gaps to be supported, you should be ok. People have changed a lot of things to make mod ports work. Move pins, cut new ring lands for the rings and add new pins, run one ring, you name it.
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    Should just drive em' in the daylight anyway.

    slowestsled

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    Re: adding finger ports to sachs
    « Reply #19 on: January 16, 2018, 08:40:14 pm »
    you DEFINITELY DO NOT WANT THE RING GAP,(PIN) IN THE MUCH WIDER EXHAU >:( >:(ST OPENING.  :-[ :-[ :-[ :-[
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    AHood

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    Re: adding finger ports to sachs
    « Reply #20 on: January 17, 2018, 06:13:51 am »
    Imo not much material between Sachs transfers and intake port for a traditional style vertical port especially since you don't want to weaken the iron liner too much. It might be possible to go through the casting behind the liner and mill in two ports.  Maybe need some welding outside the cylinder to keep it from breaking through.
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    twinrotor

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    Re: adding finger ports to sachs
    « Reply #21 on: January 17, 2018, 02:57:16 pm »
    That's what I do for the Sachs is a high velocity diagonal behind the sleeve transfer port. Start by grinding a hole with a ball bit through the sleeve where the port will terminate ,now you have a mark in the aluminum where the port will go. Now push out the sleeve and create the trough down to the crankcase transfer area.Then push the sleeve back in. You should have good tooling to push the sleeve out as it is easy to break the bottom skirt off of the jug .There is enough aluminum to create this port without welding.I would send a pict but this site is to old to allow it.
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    dirtman

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    Re: adding finger ports to sachs
    « Reply #22 on: January 17, 2018, 05:14:48 pm »
    Quote from: Mario on January 16, 2018, 04:39:14 pm
    Is this the proper place to discuss fingering your Sachs?! ::)

    I'm not a Sachs therapist, but I would be happy to watch your demonstration.  :)

    Where did all the "spunk" go in you guys....   ::)

    dirtman
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    Dacota25d

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    Re: adding finger ports to sachs
    « Reply #23 on: January 17, 2018, 10:22:26 pm »
    Quote from: twinrotor on January 17, 2018, 02:57:16 pm
    That's what I do for the Sachs is a high velocity diagonal behind the sleeve transfer port. Start by grinding a hole with a ball bit through the sleeve where the port will terminate ,now you have a mark in the aluminum where the port will go. Now push out the sleeve and create the trough down to the crankcase transfer area.Then push the sleeve back in. You should have good tooling to push the sleeve out as it is easy to break the bottom skirt off of the jug .There is enough aluminum to create this port without welding.I would send a pict but this site is to old to allow it.

    Sounds like a great idea but this is a all steel jug. I will keep that info in mind tho
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    AHood

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    Re: adding finger ports to sachs
    « Reply #24 on: January 17, 2018, 11:01:15 pm »
    Sounds like you should get an aluminum jug.
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    Dacota25d

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    Re: adding finger ports to sachs
    « Reply #25 on: January 18, 2018, 03:25:41 am »
    I should but this one is free and just a experiment and for funsies. The real purpose of this is my ol man has the same sled with a 290ss that i ported lightly abd threw a megaphone on. It goes like hell. I told him i kniw i can build the same sled with a 290sa and beat him so im giving it my all
    « Last Edit: January 18, 2018, 03:28:35 am by Dacota25d »
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    AHood

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    Re: adding finger ports to sachs
    « Reply #26 on: January 18, 2018, 06:52:24 am »
    I see good luck.
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    twinrotor

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    Re: adding finger ports to sachs
    « Reply #27 on: January 18, 2018, 02:19:08 pm »
    cast iron is a drag to port on.
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    Dacota25d

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    Re: adding finger ports to sachs
    « Reply #28 on: January 18, 2018, 04:05:42 pm »
    Quote from: twinrotor on January 18, 2018, 02:19:08 pm
    cast iron is a drag to port on.

    It's been fun haha
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