Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Going back to the street.
View Single Post
  #6 (permalink)  
Old 12-02-2011, 11:59 PM
chevykid90's Avatar
chevykid90 chevykid90 is offline
454, what turns your crank?

Last journal entry: Replacing bearings and crank
Last photo:
Join Date: May 2010
Location: Newport, Washington
Age: 26
Posts: 337
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
That's about what my Firebird got with the old carb on the 454 BBC. I rebuild a different carb of the same model, dialed in the timing, and spent hours tuning it and I now get 11 MPG's average.. And that's with a very healthy 454 pumping out probably just above 500 HP/TQ. So to me your small block only getting 5 MPG's doesn't seem right. And I am also using a 750 CFM carb, but its a Holley with vacuum secondaries.
Reply With Quote