Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - First time porting heads
View Single Post
  #15 (permalink)  
Old 01-03-2013, 09:37 AM
ap72 ap72 is online now
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,678
Wiki Edits: 0

Thanks: 17
Thanked 281 Times in 261 Posts
that's actually about half way through, its also very important to blend the chamber in with the top cut of the valve job- which can be very tricky. I also didn't thin the guide any in that pic, typically I do thin it some but not as much as a lot of people do.

Just blending in the bowl cut and the top cut of the valve job on those heads will pick up 15 cfm, that area is very critical, and very tricky and time consuming as you do not want to nick the valve seat. smoothing out the short turn a little can help too, just don't get carried away. In general the areas closest to the valve seat are the most important. Also, enlarging the pushrod pinch a little and getting a nice and even contour on the roof will help with higher rpm power.
Reply With Quote
The Following User Says Thank You to ap72 For This Useful Post:
Camaro_Nut2001 (01-03-2013)