any info for polished piston
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any info for polished piston

  1. #1
    senior member turbo wog's Avatar
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    Default any info for polished piston

    i had to relief cut my pistons for the valve a little more & got carried away & wound up polishing the tops of my pistons for detonation resistance & to keep carbon from hopefully sticking to the piston. anybody have any info if this will help & how much ? will it run more timing now ?1* 2*? any dyno info? Click image for larger version. 

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    Senior Member bville's Avatar
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    It will not hurt,I doubt it will help either the main thing is no sharp edges on your cuts.

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    Senior Member Hass828's Avatar
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    Quote Originally Posted by turbo wog View Post
    i had to relief cut my pistons for the valve a little more & got carried away & wound up polishing the tops of my pistons for detonation resistance & to keep carbon from hopefully sticking to the piston. anybody have any info if this will help & how much ? will it run more timing now ?1* 2*? any dyno info? Click image for larger version. 

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    Dude, you got the Reher Morrison kit installed for the extra head bolts, way to go
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

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    senior member turbo wog's Avatar
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    Quote Originally Posted by Hass828 View Post
    Dude, you got the Reher Morrison kit installed for the extra head bolts, way to go
    i was actually lifting the head there! i just went to the 1/2 studs too.,due to too many helicoils & constant water in tthe oil.

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    Quote Originally Posted by bville View Post
    It will not hurt,I doubt it will help either the main thing is no sharp edges on your cuts.
    i did slightly roll the edge.just to get the sharpness off. the relief cut.

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    Senior Member bville's Avatar
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    That should do it.

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    Quote Originally Posted by Hass828 View Post
    Dude, you got the Reher Morrison kit installed for the extra head bolts, way to go
    How long have these been available? I don't have the 6th head bolt provision on my bowtie tall deck. Running cometics, any Idea on my boost limitation? engine is similar to yours but would like to keep the boost down.

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    Senior Member wagspe208's Avatar
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    Quote Originally Posted by DEL51 View Post
    How long have these been available?
    20 years give or take.
    Wags

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    senior member turbo wog's Avatar
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    Quote Originally Posted by DEL51 View Post
    How long have these been available? I don't have the 6th head bolt provision on my bowtie tall deck. Running cometics, any Idea on my boost limitation? engine is similar to yours but would like to keep the boost down.
    i had that particular brand on my boat in 2009.

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    Quote Originally Posted by wagspe208 View Post
    20 years give or take.
    Wags
    They say ignorance is bliss, But I am not blissful right now.Mark asked me about this. I am hoping my setup as is will be ok for now. What I am wondering is this a viable option,These RHM Inserts, or should a new block be in my future? As of 2 yrs ago,I ran a 580 gas/roots blown 12-14psi with a 250 shot of nitrous with no gasket failure,"cometic".DTS dyno @1070 hp and 1288 with the nitrous on @6400rpm. went thru 7, 10lb bottles in 3 months. Did not run the boat last yr, and decided to change due to noise Law harassment, but the basic engine remains. Nice Dart heads with shaft rockers, etc, Kept the same cam. Purchased 2, S480 turbos, 60 mm waste gates and 1 blow off valve, Same intercooler as Hass, Same intake and carb,JE turbo pistons, Smith Bros Psh rods, Olsen Pan with -12 drains. goal is 1300 hp on pump 93 less hp is ok as long as I am quiet. Dyno time will take place.

  13. #11
    senior member turbo wog's Avatar
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    Quote Originally Posted by DEL51 View Post
    They say ignorance is bliss, But I am not blissful right now.Mark asked me about this. I am hoping my setup as is will be ok for now. What I am wondering is this a viable option,These RHM Inserts, or should a new block be in my future? As of 2 yrs ago,I ran a 580 gas/roots blown 12-14psi with a 250 shot of nitrous with no gasket failure,"cometic".DTS dyno @1070 hp and 1288 with the nitrous on @6400rpm. went thru 7, 10lb bottles in 3 months. Did not run the boat last yr, and decided to change due to noise Law harassment, but the basic engine remains. Nice Dart heads with shaft rockers, etc, Kept the same cam. Purchased 2, S480 turbos, 60 mm waste gates and 1 blow off valve, Same intercooler as Hass, Same intake and carb,JE turbo pistons, Smith Bros Psh rods, Olsen Pan with -12 drains. goal is 1300 hp on pump 93 less hp is ok as long as I am quiet. Dyno time will take place.
    i would definatly get a block that already has this incorporated into it. it wound up costing double the estimated cost to do + the sonic test + the many helicoils put in & the helicoil removal to go 1/2 " studs,drilling for the studs . the studs were over $300. worrying about block failure. all the water in the oil from seepage though threads etc. get a good block ! i could of had a (good)v8

  14. #12
    Senior Member Hass828's Avatar
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    Quote Originally Posted by DEL51 View Post
    They say ignorance is bliss, But I am not blissful right now.Mark asked me about this. I am hoping my setup as is will be ok for now. What I am wondering is this a viable option,These RHM Inserts, or should a new block be in my future? As of 2 yrs ago,I ran a 580 gas/roots blown 12-14psi with a 250 shot of nitrous with no gasket failure,"cometic".DTS dyno @1070 hp and 1288 with the nitrous on @6400rpm. went thru 7, 10lb bottles in 3 months. Did not run the boat last yr, and decided to change due to noise Law harassment, but the basic engine remains. Nice Dart heads with shaft rockers, etc, Kept the same cam. Purchased 2, S480 turbos, 60 mm waste gates and 1 blow off valve, Same intercooler as Hass, Same intake and carb,JE turbo pistons, Smith Bros Psh rods, Olsen Pan with -12 drains. goal is 1300 hp on pump 93 less hp is ok as long as I am quiet. Dyno time will take place.
    That kit will stop the problem of lifting the head & gasket in that spot. As for just how far you can push that block, every one is a little different but your right there at the limit.
    When you finally decide to do something about it I would suggest going to an aftermarket block. Its an all around stronger platform to build on and the head bolts are blind tapped so no worry about water there and stripped threads from water errosion.
    If it were me, I'd go ahead & run it the way it is but I would be gathering the cash so I could purchase a block and have it ready for the next tear down.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
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  15. #13
    senior member turbo wog's Avatar
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    Quote Originally Posted by Hass828 View Post
    That kit will stop the problem of lifting the head & gasket in that spot. As for just how far you can push that block, every one is a little different but your right there at the limit.
    When you finally decide to do something about it I would suggest going to an aftermarket block. Its an all around stronger platform to build on and the head bolts are blind tapped so no worry about water there and stripped threads from water errosion.
    If it were me, I'd go ahead & run it the way it is but I would be gathering the cash so I could purchase a block and have it ready for the next tear down.
    it's always good to have a spare motor/block. i want to gut the 454 gm block & put it all in something else. although it seems wrong to do that when i could get a tall deck ,bigger bore deal & then i would need a intake ,pan ?, pistons ,rods ,might as well go a stroker crank,rebalance etc.7k + instead of @$1500-$3000?for a aftermarket block .

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