Regarding the heads, what I was taught was that a closed chamber will build compression better, but at the sacrifice of flow, because the small chamber shrouds the valves. Open chambers on otherwise equivalent heads will flow better but are harder to build compression with, requiring more dome on the piston. I may be mistaken but I don’t believe I’ve seen a set of aftermarket heads with closed chambers, at least not modern production units.
Devin _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim & Chris Sent: Tuesday, November 13, 2007 12:05 PM To: [email protected] Subject: [Chevelle-list] HEI conversion / heads First,I was wondering if any one can explain how to convvert from a old style points distributer to HEI ? or suggest a link. Secondly, I was wondering what the advanteges or differences between open and closed chamber heads. Tomorrow I am going to look through old parts that have been sitting in a barn for the last 10 years and there are a set of BBC closed chamber heads that are bare among other misc. parts. don't know anything about them, but I am going to get the casting #'s off them,but would like to know what you guys think. Jimmy C. Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.15.12 - Release Date: 10/26/2007 12:00 AM Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.15.12 - Release Date: 10/26/2007 12:00 AM
