Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - exhaust crossover questions
View Single Post
  #2 (permalink)  
Old 06-08-2007, 01:04 AM
willys36@aol.com's Avatar
willys36@aol.com willys36@aol.com is offline
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,393
Wiki Edits: 21

Thanks: 1
Thanked 8 Times in 8 Posts
How times have changed. Back in the 'old days' all engines were set up like that! The X-over valves were actuated with bi-metallic springs that unwound as the header got hot and opened the valve. Main problem was rusted and sticky valves that froze open or closed. Had to WD40 and pound on them to keep them loose. Will work fine and definitely helps engines warm up quicker. Just can't rev the engine to 10,000rpm w/ valve closed but you wouldn't try that would you?
Reply With Quote