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blower pistons needed

  1. #1
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    Default blower pistons needed

    i need to get a set of pistons for motor not opposed to getting new ones but if i have to pay to have them made i would like an input on who to place my order with. its a gen 4 block with a 4.250 stroke 4.320 bore and a 6.3850 rod a 111cc head and im trying to get it as close to 8:1 as possible........... i apprecite all of the help in advance

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    gn7
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    This is about as close as your going to get off the shelf with that chamber. 11.5 cc dish. If you go custom, Arias, Venolia, JE, CP, take your choice. Or you run a flat top and a thick ass gasket.


    http://www.summitracing.com/parts/UE...n/?prefilter=1

    http://www.kb-silvolite.com/icon/ico...tails&P_id=561



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    Last edited by gn7; 07-12-2010 at 02:53 PM.

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    I havent head good expierence with kb pistons, the ones that i ran were hypereutectic though, would you run them in your boat? My application is a recreational flatbottom. Not trying to break the sound barrier just run trip digits and stay together

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    Quote Originally Posted by SCSRIVERRAT View Post
    I havent head good expierence with kb pistons, the ones that i ran were hypereutectic though, would you run them in your boat? My application is a recreational flatbottom. Not trying to break the sound barrier just run trip digits and stay together
    The new Icon forged pistons from KB don't look too bad, but I think it might be worth the extra money to step up to a better piston with the blown application.

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    gn7
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    Quote Originally Posted by SCSRIVERRAT View Post
    I havent head good expierence with kb pistons, the ones that i ran were hypereutectic though, would you run them in your boat? My application is a recreational flatbottom. Not trying to break the sound barrier just run trip digits and stay together
    I have run them. Don't know what your issuses were with the hypers, the vast majority of the time they are set up wrong by the machine shops. Too tight on the bore(for a boat) and then too tight on the rings for a hyper. These are forged. and they are a different animal. I beat the hell out of one these. I am still amazed it stay in one piece.



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    What would the proper clearance be on the piston

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    gn7
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    Quote Originally Posted by obnoxious001 View Post
    The new Icon forged pistons from KB don't look too bad, but I think it might be worth the extra money to step up to a better piston with the blown application.
    Yeah I totally agree. So would a Sonny Bryant Crank, Carrillo or Oliver rods, Dart or Merlin race block. Maybe even a Donovan or Brodix alumn block



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    Last edited by gn7; 07-12-2010 at 04:09 PM.

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    Quote Originally Posted by gn7 View Post
    I have run them. Don't know what your issuses were with the hypers, the vast majority of the time they are set up wrong by the machine shops. Too tight on the bore(for a boat) and then too tight on the rings for a hyper. These are forged. and they are a different animal. I beat the hell out of one these. I am still amazed it stay in one piece.
    I agree. When I bought my boat it was making 12 lbs ob boost under the chiller running av gas. when it was time to freshin it up I was shocked to find hypers in it especially when they were 10.5 to one. they looked fine considering I ran the s%$T out of it.

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    Distinguished Member David 519's Avatar
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    Quote Originally Posted by SCSRIVERRAT View Post
    I havent head good expierence with kb pistons, the ones that i ran were hypereutectic though, would you run them in your boat? My application is a recreational flatbottom. Not trying to break the sound barrier just run trip digits and stay together
    I've had good luck with hypereutectic pistons in a asphalt drag racing motor. Should be fine in a lake flatty. I wouldn't hesitate to run them again if they had an off the shelf part that no one else did... That's the reason I chose them on the one motor I used them in. That said, if I had a choice, I'd go with a decent forged piston even if it cost a few bux more...
    Good luck.
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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