benefit to larger bore?
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B*a*n*n*e*d
Joined: Jun 2009
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benefit to larger bore?
what would be the benefit of changing to a 76mm piston as opposed to a 75? I want low compression for turbo but my cylinder wall is pitted so I must bore n re-hone. also gotta get new pistons....
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From: Space
Re: benefit to larger bore?
The only real benefit of a larger bore only comes in crazy all motor race applications. If you run huge valves you may run into a "shrouding" problem where the bore clearance is too small for air to flow nicely around the valve. A larger bore helps in this application because air can flow from the port to the chamber better.
You'll see a small increase in compression ratio too assuming everything else is the same except bore size. Its nothing really to be concerned with, the change isn't very much.
You'll see a small increase in compression ratio too assuming everything else is the same except bore size. Its nothing really to be concerned with, the change isn't very much.
Thread Starter
B*a*n*n*e*d
Joined: Jun 2009
Posts: 880
Likes: 0
Re: benefit to larger bore?
The only real benefit of a larger bore only comes in crazy all motor race applications. If you run huge valves you may run into a "shrouding" problem where the bore clearance is too small for air to flow nicely around the valve. A larger bore helps in this application because air can flow from the port to the chamber better.
You'll see a small increase in compression ratio too assuming everything else is the same except bore size. Its nothing really to be concerned with, the change isn't very much.
You'll see a small increase in compression ratio too assuming everything else is the same except bore size. Its nothing really to be concerned with, the change isn't very much.
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