chamber size vs. piston top?
Thread Starter
Abby Normal
Joined: Dec 2001
Posts: 53,456
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From: Press "2" for English
chamber size vs. piston top?
i'm just curious to know what the advantages/disadvantages are between the two in the given scenario.
say you wanted to run an iron block with aluminum heads. to keep it pump gas friendly, you shoot for a static compression ratio of 9.5:1.
to achieve this you can go with a small chamber and flat or dished piston *or* a larger open chamber design with a domed piston.
what would be ups and downs of either way?
say you wanted to run an iron block with aluminum heads. to keep it pump gas friendly, you shoot for a static compression ratio of 9.5:1.
to achieve this you can go with a small chamber and flat or dished piston *or* a larger open chamber design with a domed piston.
what would be ups and downs of either way?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
A dome can get in the way of both the flame front travel and the A/F mixture swirl. I don't see the down side to a dished piston, but it is said that a flat top piston is the most efficient.
RACE ON!!!
RACE ON!!!
A flat top or dished is the better way to go IMHO
Advanced
Joined: Aug 2006
Posts: 65
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Even 10:1 on pump premium is feasible with heart-shaped, high-swirl chambers and flat top or D-dish pistons. Know your cam's intake valve closing angle and take DCR into consideration when choosing a piston, head, cam combo.
Last edited by Mike_B; Nov 17, 2006 at 09:16 AM.
