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Thread: 1999 sltx 1050

  1. #1
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    1999 sltx 1050

    Was there anything special about the 1999 SLTX 1050 ? I'm just curious. If you have read Mort's Hurricane project you already know that I discovered that one of my Hurricane projects has these cylinders. Just wondering how they compare to other 1050's?


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    ph2ocraft's Avatar
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    The "hot" cylinders were the 009's due to their porting characteristics.
    I'm not sure just how the 019 differed with the 009's, sounds like a great question for an engine builder from "back in the day".

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    PolarisNut's Avatar
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    Quote Originally Posted by Polaris_Nut#1 View Post
    Was there anything special about the 1999 SLTX 1050 ? I'm just curious. If you have read Mort's Hurricane project you already know that I discovered that one of my Hurricane projects has these cylinders. Just wondering how they compare to other 1050's?
    The porting is a bit higher on the 009s...exhaust and transfers. I want to say it was 1.5mm. They turned more rpm and would then make the boat faster. Both 96 and 97 hurricanes had the 009s. The SL700s and the newer 1050s were the lower port jugs. Hurricanes also had tighter domes.

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    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    Quote Originally Posted by PolarisNut View Post
    The porting is a bit higher on the 009s...exhaust and transfers. I want to say it was 1.5mm. They turned more rpm and would then make the boat faster. Both 96 and 97 hurricanes had the 009s. The SL700s and the newer 1050s were the lower port jugs. Hurricanes also had tighter domes.
    OK, now I'm really confused because the ones I have are the 09's with a exhaust bridge. Should they have this or were they re sleeved? Wolf said the cane cylinders didn't have the bridge? I checked parts-land and all the part numbers are different now. The must have be updated or something. It now shows 19's on the SLTX and 18's on the Hurricanes. Thanks Nut! I have the correct heads thanks to Del. I had miss matched heads, but now I have three of the good ones. I wanna pull the cover off my complete cane, but it's 35 degrees and I don't know if I'll get it back on. I know it has never been a part. I'm lost. So I'm guessing the 09's should be good for rebuilding this engine someday.

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    PolarisNut's Avatar
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    Quote Originally Posted by Polaris_Nut#1 View Post
    OK, now I'm really confused because the ones I have are the 09's with a exhaust bridge. Should they have this or were they re sleeved? Wolf said the cane cylinders didn't have the bridge? I checked parts-land and all the part numbers are different now. The must have be updated or something. It now shows 19's on the SLTX and 18's on the Hurricanes. Thanks Nut! I have the correct heads thanks to Del. I had miss matched heads, but now I have three of the good ones. I wanna pull the cover off my complete cane, but it's 35 degrees and I don't know if I'll get it back on. I know it has never been a part. I'm lost. So I'm guessing the 09's should be good for rebuilding this engine someday.
    If you have an exhaust bridge on 009s, it's not a Polaris sleeve. Polaris hasn't used any cylinders with the bridge on any of the domestics...it's not needed. 009s have been discontinued and now sub to the 018s, which have the same port timing, but a slightly different exhaust port shape, for improved ring life.

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    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    Quote Originally Posted by PolarisNut View Post
    If you have an exhaust bridge on 009s, it's not a Polaris sleeve. Polaris hasn't used any cylinders with the bridge on any of the domestics...it's not needed. 009s have been discontinued and now sub to the 018s, which have the same port timing, but a slightly different exhaust port shape, for improved ring life.
    OK, that solves one mystery. Now I just wonder who's sleeve's are in my 09's. Here are the pictures. Plus one picture of the spring cleaning I need to take care of. Would you use these cylinders for a rebuild with that bridge or will it wear the rings out faster?
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    Connecticut CrazyA's Avatar
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    Polaris_Nut1,
    I'm confused. You keep refering to this "exhaust bridge", but you haven't shown us a single picture with this "bridge". Actually, I don't think we've seen 1 picture of the exhaust port from the inside, have we? I'm confused. You're not referring to that "hole" in your intake transfer port are you?


    .

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    Quote Originally Posted by CrazyA View Post
    Polaris_Nut1,
    I'm confused. You're not referring to that "hole" in your intake transfer port are you?
    .
    Crazy, I guess you are right somebody told me that it was an exhaust bridge. Duh, I never even questioned it. You're right it's on the intake side. Now if I could only remember who told me it was an exhaust bridge??? So are these good cylinders for a rebuild or what? I was told 09's were the good ones. Are there better ones?

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    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    OK, my confusion started with post #29. (when I asked about the hole in the side of the piston)

    http://www.greenhulk.net/forums/show...t=12212&page=3

    Hydrotoys nailed it right away and I didn't pick up on it. My bad!

  10. #10
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    The hole is called a boost port.
    My understanding is the the hole redirected the flow of the incoming charge to hold it better in the combution chamber, so as not to waste the charge through the exhaust.

    It works very well, but the returning spent charge, when on the pipe, causes a leaner mixture. No problem if you have the correct jetting.

    Personally, I favor the 019's. Their only good for ~6500-6700rpm, but the lower exhaust port gives you more torque out of the hole.

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