New engine is cranking!! - Real world results
Senior Member
Joined: Jul 2001
Posts: 2,660
Likes: 0
From: Miami / NYC
Originally Posted by Brian K
In a nutshell, Jim made some changes as follows:
Spherical domed pistons instead of the normal flat tops (This effectively takes the CR up to 9.0:1 vs 8.0:1. Stock = 8.4:1, flat tops = 8.0:1 and spherical = 9.0:1)
Stock bore
The newest JDM CNC'ed heads and cams
Spherical domed pistons instead of the normal flat tops (This effectively takes the CR up to 9.0:1 vs 8.0:1. Stock = 8.4:1, flat tops = 8.0:1 and spherical = 9.0:1)
Stock bore
The newest JDM CNC'ed heads and cams
Stock pistons are a 16cc dish, how can flat tops be lower compression? A domed piston would produce much higher than 9.0:1
A smaller dish (such as the 11cc or 5cc sizes that are stocked for mustang applications) will make 9.0:1 easily.
Thread Starter
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Senior Member
Joined: Aug 1999
Posts: 754
Likes: 0
From: Northern VA, USA
MisterG,
Sorry I am not an engine guru.
Let me use some simpler terms...Whatever pistons are currently used in built engines (flat, dome, triangluar, octagonal), whatever you want to call them, lower compression...
Hows that???
Sorry I am not an engine guru.
Let me use some simpler terms...Whatever pistons are currently used in built engines (flat, dome, triangluar, octagonal), whatever you want to call them, lower compression...
Hows that???
Senior Member
Joined: Jul 2001
Posts: 2,660
Likes: 0
From: Miami / NYC
Originally Posted by Brian K
MisterG,
Sorry I am not an engine guru.
Let me use some simpler terms...Whatever pistons are currently used in built engines (flat, dome, triangluar, octagonal), whatever you want to call them, lower compression...
Hows that???
Sorry I am not an engine guru.
Let me use some simpler terms...Whatever pistons are currently used in built engines (flat, dome, triangluar, octagonal), whatever you want to call them, lower compression...
Hows that???
