does anybody know how much omni flat faced valves will decrease the combustion chamber volume on a B16? i need to know so i can figure out what i want to do with the rest of my engine

 

Omni states its usually around .2-.3 but its different in every engine. In some heads, you may even lose compression.

 

i know thats what they say the Compression Ratio increse is. what i'm looking for is what the change in combustion chamber volume is. i dont have the tools to measure it

 

You mean as in CC increase/decrease? If you dont have the tools to measure it but still want the info, take it to someone who does have the tools, dont expect to find the answer on HT.

 

i was just wondering if anyone else has done it, thats all

 

It should reduce the combustion chamber volume by approximately 1-1.2cc or so. This will give you about a .2 bump in compression.

 

thank you

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">It should reduce the combustion chamber volume by approximately 1-1.2cc or so. This will give you about a .2 bump in compression.</TD></TR></TABLE>

Yea, in the end it will usually raise static CR by about .2-.3, but unless you measure it, youll never know.