Hi Mark, Both of my H's have 1/4"+ thick fibrous spacers between the Carter AFB's and the intake manifold. I could never figure out their purpose until now - probably to limit heat transfer! Doug Warrener Fair Oaks, CA 300H ----- Original Message ----- From: "Mark Lindahl " < mplindahl @ sbcglobal .net> To: chrysler300@ yahoogroups .com Sent: Wednesday, September 9, 2009 7:55:27 AM GMT -08:00 US/Canada Pacific Subject: [Chrysler300] Flooding of Carter 3256SA Carb - '63 300 Conv . Hi All, I have tried a few things to reduce/eliminate the boiling of gas in the carb bowls after hot weather driving and shut down of 383. Within a few minutes, the carb gets so hot that the fuel is boiling and flooding occurs. I have seen it a few times. The engine does not run hot during normal driving. Temp/Gas Guage seem to be calibrated with temp guage around the 1/2-3/4 mark. At idle and normal driving speeds, the engine runs strong. Newer open chamber heads were installed about 18 months ago along with hardened seats for unleaded gas. I reinstalled the original valley pan and now have a 4 bbl. carb instead of the original 2 bbl. Here is what I have tried. Installed gasket between hood and radiator support: It looks good, but does not help my problem. Installed new needle/seat in carb : Flooding still occurs, but somewhat less. Waiting for stainless steel plate to install under carb to reduce heat transfer: will advise. I have removed the spring from the exhaust manifold allowing for free movement of the valve: no change. I took off the heavy metal air cleaner top and now have the air filter exposed using just a flat top: no change. I also vaguely remember that some valley pans have the the heat passages blocked off to not allow heat back up to the carb . Since I don't drive the 300 in the winter or much when it is cold, is this a good idea? Are there certain valley pans with the heat passages cut out and some with them blocked off? Any ideas would be helpful. Regards, Mark Lindahl '63 300 Conv . [Non-text portions of this message have been removed] __ ._,_. __ _ Messages in this topic ( 1 ) Reply (via web post) | Start a new topic Messages | Photos To send a message to this group, send an email to: Chrysler300@ yahoogroups .com For list server instructions, go to http :// www .chrysler300club.com/ yahoolist /inst. htm For archives go to http :// www . forwardlook .net/300-archive/ Yahoo! Groups Change settings via the Web (Yahoo! ID required) Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe Recent Activity • 1 New Members Visit Your Group Give Back Yahoo! for Good Get inspired by a good cause. Y! Toolbar Get it Free! easy 1-click access to your groups. Yahoo! Groups Start a group in 3 easy steps. Connect with others. . __ ,_._, __ _ [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/