Blown gas Ring end gap
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Blown gas Ring end gap

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    Senior Member TwinTurbo540's Avatar
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    Default Blown gas Ring end gap

    What are you guys running your ring end gap for blown gas set up's? Number 1 and 2 ring? This is a 565 chev, 14-71 set up, 10 to 20psi with possibly some nitrous on top of it in the future.
    Thanks

    Travis
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    Senior Member Hass828's Avatar
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    Quote Originally Posted by TwinTurbo540 View Post
    What are you guys running your ring end gap for blown gas set up's? Number 1 and 2 ring? This is a 565 chev, 14-71 set up, 10 to 20psi with possibly some nitrous on top of it in the future.
    Thanks

    Travis
    depends on the ring material and the inches of cylinder bore. I went with a gapless stainless top ring and a napier second from total seal and I think the recommended gap was .041 top and .036 bottom, but you should follow the directions with the actual rings that you are running.
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    Senior Member TwinTurbo540's Avatar
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    Quote Originally Posted by Hass828 View Post
    depends on the ring material and the inches of cylinder bore. I went with a gapless stainless top ring and a napier second from total seal and I think the recommended gap was .041 top and .036 bottom, but you should follow the directions with the actual rings that you are running.

    I hear ya Hass but I am running a set of rings that came with my ceramic coated Mahle pistons and they say bore X .0055 top and Bore X .0065 second for Blown Gas. Wich means .0253 top and .0299 second Just seeing what others thought...

    Thanks man!!

    Travis
    I like my women like I like my boats......Fast and ready to get wet at all times!!

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    gn7
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    Quote Originally Posted by TwinTurbo540 View Post
    I hear ya Hass but I am running a set of rings that came with my ceramic coated Mahle pistons and they say bore X .0055 top and Bore X .0065 second for Blown Gas. Wich means .0253 top and .0299 second Just seeing what others thought...

    Thanks man!!

    Travis
    I would consider those as minimum. Remember, they think your cylinder is going to grow more than it is. It's not a car motor, and it runs colder. Now the ring can dump heat off to the cooler cylinder better in a boat, but it is the general concensus that a boat motor will close the gap easier than a car motor.
    And please don't fall in to the false thinking that your Mahle are ceramic coated. It is not ceramic, and it does nothing to shield or desipate heat. It is a phosphate coating to keep the rings form micro welding and helps in the pin area. the whole piston coated because it just cheaper than way. It does have a dry film anti scuff coating on the skirts though. Just don't want you think that your safer due to this grey coating on your Mahles. Disreguard all this if you sent them out for coating



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    hey travis if you want to put nitrous on that monster now instead of later i can make you a hell of a deal on a kit i bought for a blower motor project i was working on . i have a complete nos roots blower injector plate kit with two bottles purge and its been upgraded to the pro shot nitrous noids so you can shoot up to 325hp i decided to stay with the tunnel ram setup so its just sittin in a box....

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    Senior Member TwinTurbo540's Avatar
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    Quote Originally Posted by gn7 View Post
    I would consider those as minimum. Remember, they think your cylinder is going to grow more than it is. It's not a car motor, and it runs colder. Now the ring can dump heat off to the cooler cylinder better in a boat, but it is the general concensus that a boat motor will close the gap easier than a car motor.
    And please don't fall in to the false thinking that your Mahle are ceramic coated. It is not ceramic, and it does nothing to shield or desipate heat. It is a phosphate coating to keep the rings form micro welding and helps in the pin area. the whole piston coated because it just cheaper than way. It does have a dry film anti scuff coating on the skirts though. Just don't want you think that your safer due to this grey coating on your Mahles. Disreguard all this if you sent them out for coating
    Thanks for the ring info and yes I did have them costed seperatly by a shop here in town.
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    Senior Member TwinTurbo540's Avatar
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    Quote Originally Posted by 540bahner View Post
    hey travis if you want to put nitrous on that monster now instead of later i can make you a hell of a deal on a kit i bought for a blower motor project i was working on . i have a complete nos roots blower injector plate kit with two bottles purge and its been upgraded to the pro shot nitrous noids so you can shoot up to 325hp i decided to stay with the tunnel ram setup so its just sittin in a box....
    Already have the kit sitting on the shelf!! Get ahold of Chris Porter, I know he was intersted in a kit a while back.

    Travis
    I like my women like I like my boats......Fast and ready to get wet at all times!!

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    gn7
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    Quote Originally Posted by TwinTurbo540 View Post
    Thanks for the ring info and yes I did have them costed seperatly by a shop here in town.
    It was just a heads up. There are alot of people who mistake that as a "coated" piston. Its a great piston, and the coatings they do rock. But it isn't a thermal coating.



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    Senior Member TwinTurbo540's Avatar
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    Quote Originally Posted by gn7 View Post
    It was just a heads up. There are alot of people who mistake that as a "coated" piston. Its a great piston, and the coatings they do rock. But it isn't a thermal coating.
    I do appreciate the heads up!! You never know and it could have saved if if I did not know!!

    Travis
    I like my women like I like my boats......Fast and ready to get wet at all times!!

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