Holed Piston Update
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Holed Piston Update

  1. #1
    gn7
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    Default Holed Piston Update

    Doesn't really look so bad now does it?



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    Cantard 71hallett's Avatar
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    Side view please. You know you want to show the lifted ring land off.
    Last edited by 71hallett; 12-02-2008 at 05:16 PM.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    gn7
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    uh-oh, what hoppen here? This sucker got hot! Strange part is, the other seven are flawless. This thing siezed the pin in the rod, tore up the ring land, the dome is sagged about an 1/8. Hard see in the pics, but the underside of the dome is jet black. I have a clue as to what happened, but don't want to turn the t-ram over to Shaun until I know for sure. It's the #5 cyl, but really shouldn't matter much considering it's a t-ram. I am just glad it didn't turn out to be the pistons fault, I had pretty hi expectations for them



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    Last edited by gn7; 12-02-2008 at 05:24 PM.

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    Cantard 71hallett's Avatar
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    Now I gota go think about this. That thing had to be seriously


    HOT!!!!
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Ouch!
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Quote Originally Posted by gn7 View Post
    I have a clue as to what happened, but don't want to turn the t-ram over to Shaun until I know for sure.

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    Cantard 71hallett's Avatar
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    What did the intake gasket look like? I just find it odd the pin got that hot. Detonation can do funny things once it gets going but........
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    gn7
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    Quote Originally Posted by 71hallett View Post
    What did the intake gasket look like? I just find it odd the pin got that hot. Detonation can do funny things once it gets going but........
    No it was not an intake gasket, it was a scewed K&N stub stack in the air cleaner, turned about 20-25*, it's kinda hard to visulize why, but it disrupted the air over the booster and it couldn't see the velcity/pressure drop correctly. And on a t-ram at speed, this can never be good. Look at this pic and maybe it will make a little sense. It didn't seem to have an effect on the secondary side, probably due to the round opening compared to the primary,but imagine this thing rotated CW 20* and the effect on the primaries. And mostly the one on the lower right of the pic



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    Last edited by gn7; 12-03-2008 at 05:35 PM.

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    Cantard 71hallett's Avatar
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    I had something like that in my head for some reason but it didnt make sense to me why I was thinking this. My second guess was actualy going to be a pluged jet or float screwed up.... something along those lines. That is a pretty crappy way to have an engine get hurt.

    I remember a pm about t-rams not so very long ago. Stuff like this was why I was asking questions.

    Bottom line ... racing is racing and stuff does and will break.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    gn7
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    years ago, I had a blade of grass go down the bowl vent and in up in the jet of this same t-ram set up, did quite do this much damage, but knocked the rod bearing to hell! That's why I wanted to check everything over before turning this deal over to Shaun, but the carbs seem ok and THAT main jet circuit flows fine.



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    Quote Originally Posted by gn7 View Post
    years ago, I had a blade of grass go down the bowl vent and in up in the jet of this same t-ram set up, did quite do this much damage, but knocked the rod bearing to hell! That's why I wanted to check everything over before turning this deal over to Shaun, but the carbs seem ok and THAT main jet circuit flows fine.
    Had a jet extension screw up once (one of those never again push on ones) Got lucky, just killed the plug.

    Broke a couple rings and curled a ring land once because a rotor came loose.

    OHHH YESS these things happen, no question about it.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    Quote Originally Posted by 71hallett View Post
    Now I gota go think about this. That thing had to be seriously


    HOT!!!!
    If all the rest of the holes and slugs are good ???? New motor ???? Black burn't oil on one piston only???? skirt rubbed that bad?????

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    Quote Originally Posted by gn7 View Post
    not that hard ole guy, the hole went lean.
    If that's what you have come up with then fine!!!! but just a thought! If you think it is only a carb problem then why are the skirts showing so much scarring. The reason I posted on this thread was to maybe get you to look at the possibilty of maybe a dry hole!!! Even with a lean cyclinder why would the skirts be so scared. If the rings are doing what they are supposed to do why the damage under the rings? If it were me I would check PTW and the ring stack on that cyclinder. M

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