dish pistons VS strenth~?~?!! need help fast please
11-08-2006, 11:57 PM
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dish pistons VS strenth~?~?!! need help fast please well though all the reading i have done And have read this is what i have gathered. The more you dish a piston the more strength and meat A piston will loose aposed to a flat top piston or piston that is not dished as much. can someone chime in on this issue. I am in a friendly argument with a buddy and would like to know the answer....
11-09-2006, 12:00 AM
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Originally Posted by Mr_president
well though all the reading i have done And have read this is what i have gathered. The more you dish a piston the more strength and meat A piston will loose aposed to a flat top piston or piston that is not dished as much. can someone chime in on this issue. I am in a friendly argument with a buddy and would like to know the answer....
11-09-2006, 12:26 AM
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from what ive read was that the more a piston is dished -32cc compared to a -2cc piston the 32cc piston wouldnt be as strong...were do you get resources from blue02ws6?
11-09-2006, 08:05 AM
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pistons. When we design a piston, we'll run a variety of different thicknesses in the crown depending on the usage. General guidelines are: Pure drag .150", roadrace .180, street/strip .200, street .225, nitrous/blower is .250" in the thinnest part of the forging. If it's a big shot of Nos-like a 800 shot, we sometimes run that thickness up to .280+. Our reverse domes will have the same amount of meat underneath as a flat top for any given application and will get correspondingly heavier the deeper you make them. Ring land thickness is determined by compression height (center of pin to deck of piston) and subtracting the thickness of the ring pack leaves us with a net amount of land material you can apply to the top and 2nd lands.
In the extreme case of HUGE dishes and short compression heights, the small end of the rod will be very close to the underside of the forging. It's ok to mill this one small area underneath for clearance and make it as thin as .160 or so even in a blower app. If a dish is used instead of a reverse dome, it becomes a lathe operation instead of a milling application and we sometimes leave a "lump" in the center to maintain our constant .250 thickness. Another plus is a dished piston will weigh less than a reverse dome of the same volume because the depth will be less.
-Brian Nutter-Wiseco
In the extreme case of HUGE dishes and short compression heights, the small end of the rod will be very close to the underside of the forging. It's ok to mill this one small area underneath for clearance and make it as thin as .160 or so even in a blower app. If a dish is used instead of a reverse dome, it becomes a lathe operation instead of a milling application and we sometimes leave a "lump" in the center to maintain our constant .250 thickness. Another plus is a dished piston will weigh less than a reverse dome of the same volume because the depth will be less.
-Brian Nutter-Wiseco
11-09-2006, 12:50 PM
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sooo how does that answer my question? no offense...sorry im new to all this forged stuff so basically there all the same strength?
Last edited by Mr_president; 11-09-2006 at 01:33 PM.
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11-09-2006, 06:21 PM
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Basically what he was saying is that there are different designs ie. thickness/strength for different applications and they aren't dedicated towards just flat top or dished. So yes they are pretty much the same like I said before. Just think of it this way, you can have a "top" meat of the piston and have an edge that will be TDC. You can design a center section with the same mass but larger cc just like a flattop that has no edge/lip that extends past the majority of the piston. Check this pic.
