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Old 05-11-2020, 09:31 PM   #27
Phil Gillespie
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Join Date: Sep 2011
Location: Christchurch New Zealand
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Default Re: 59a with Scat Set Up Your thoughts please.

Quote:
Originally Posted by Bored&Stroked View Post
In a blown flathead, if you need a lower compression ratio, you don't do it with flattop pistons and a domed head - it is typically done with larger transfer areas, larger chambers around the valve area, etc.. The combustion chamber and pistons should both match and you still want a tight quench area - this is key.

Now, there are some piston/head combinations that are designed for flattop pistons. An example is one of the Tony Baron heads that use pop-up pistons with flat tops - with flattop chambers that are high up into the head.
Appreciate the information and it assists with making decisions.
Have looked up some info on Ross pistons and seems their dome height is 0.180. so it is possible it may have dome type pistons. A first hand inspection will confirm.Not sure if the flat top are special orders unlike the dome type which would be the standard configuration?
Phil NZ.
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