Flat top vs Dish pistons
07-02-2004, 02:51 PM
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Flat top vs Dish pistons
Given the same compression. Which would you prefer ? I went with dish because of the valve reliefs, but i'm having second doubts if i made the right choice. The are ROSS pistons btw
07-02-2004, 03:14 PM
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Re: Flat top vs Dish pistons (shadow103rd)
I don't understand what you're saying, there isn't any way to get the same compression with both a dish and a flat top piston on the same motor. Dished means you have an actual dish or reverse dome which creates a lower CR. Flattop means the only "dish" to the piston is the valve releifs, which gives you higher compression than a dished piston.
07-02-2004, 04:18 PM
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Re: Flat top vs Dish pistons (Rtype16)
You can get the same compression with both pistons if you increase the piston to deck height. I'm not sure if that is such a good idea though.
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08-17-2004, 05:00 AM
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Re: Flat top vs Dish pistons (Bspec18)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bspec18 »</TD></TR><TR><TD CLASS="quote"> I went with dish because of the valve reliefs, but i'm having second doubts if i made the right choice.</TD></TR></TABLE> The deepth of the valve reliefs should have nothing to do with whether you are running a dome, flat or dished piston. They are based off the height of the piston (at the very edge). You can have deeper reliefs on a 13-1 piston than an 8-1 piston.
10-04-2005, 02:17 PM
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Re: Flat top vs Dish pistons (Chip)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chip »</TD></TR><TR><TD CLASS="quote">I don't understand what you're saying, there isn't any way to get the same compression with both a dish and a flat top piston on the same motor. Dished means you have an actual dish or reverse dome which creates a lower CR. Flattop means the only "dish" to the piston is the valve releifs, which gives you higher compression than a dished piston.</TD></TR></TABLE>
Yes you can... get the valve reliefs cut larger and deeper and you will end up with a flat top piston with the same compression ratio as a slightly dished piston with smaller and shallow reliefs.
Yes you can... get the valve reliefs cut larger and deeper and you will end up with a flat top piston with the same compression ratio as a slightly dished piston with smaller and shallow reliefs.
10-04-2005, 03:11 PM
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Re: Flat top vs Dish pistons (Tony the Tiger)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tony the Tiger »</TD></TR><TR><TD CLASS="quote">
Yes you can... get the valve reliefs cut larger and deeper and you will end up with a flat top piston with the same compression ratio as a slightly dished piston with smaller and shallow reliefs.</TD></TR></TABLE>
on that note..then the flat top would seem better as far a quench is concerned..(IMO)
Yes you can... get the valve reliefs cut larger and deeper and you will end up with a flat top piston with the same compression ratio as a slightly dished piston with smaller and shallow reliefs.</TD></TR></TABLE>
on that note..then the flat top would seem better as far a quench is concerned..(IMO)
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