BBC open chamber and closed chamber confusion

Old 04-27-2009, 07:23 AM
  #1  
fatjodycat
Member
MASTER JOURNEYMAN
Thread Starter
 
Join Date: Feb 2003
Location: Louisiana
Posts: 37
Default BBC open chamber and closed chamber confusion

Can you run open chamber heads on a motor that has closed chamber heads on it? I notice that ads for BBC heads never state whether they are open or closed chamber. I also looked at pistons in the Doug Herbert catalog and they have open chamber, closed chamber, and then saw open/closed chamber. Would a motor with GM closed chamber heads accept lets say the GM "990" open chamber heads? Thanks in advance. Eddie
fatjodycat is offline  
Old 04-27-2009, 11:23 AM
  #2  
ARUSSELL
Senior Member
MASTER BUILDER
 
Join Date: Mar 2008
Posts: 193
Default

You can put a set of open chamber heads on a closed engine and have no issues other then less compression.
ARUSSELL is offline  
Old 04-27-2009, 04:12 PM
  #3  
fatjodycat
Member
MASTER JOURNEYMAN
Thread Starter
 
Join Date: Feb 2003
Location: Louisiana
Posts: 37
Default

Thanks.
fatjodycat is offline  
Old 04-28-2009, 03:47 AM
  #4  
oldandtired
Senior Member
RACING JUNKIE
 
oldandtired's Avatar
 
Join Date: Dec 2008
Location: Sugar Hill, GA
Posts: 1,370
Default

The closed chamber heads have valve shrouding problems, effecting their flow. It's just a design thing. If you run closed chamber pistons with closed chamber heads, at least the dome assist in the breathing.
Dave
oldandtired is offline  
Old 04-28-2009, 06:00 AM
  #5  
fatjodycat
Member
MASTER JOURNEYMAN
Thread Starter
 
Join Date: Feb 2003
Location: Louisiana
Posts: 37
Default

Thanks Dave. That gives me more ammo for when I decide what to do for some more hp. I have a .30 427 with oval port closed chamber on it. It is a strong motor but I know there's more potential in it. Eddie
fatjodycat is offline  
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service