News:

  • Home
  • Help
  • Chat
  • Login
  • Register

    • « previous next »
    Pages: 1 [2]

    Author Topic: hardened valve seats  (Read 5798 times)

    Offline Roppa440

    • Full Member
    • ***
    • Posts: 501
    Re: hardened valve seats
    « Reply #15 on: February 23, 2009 - 02:38:57 PM »
    Look at any photo of stock heads. Like this '67 closed chamber 440 head. The area around the valve seat is machined flat.
    Logged
    Dave
    1970 Challenger R/T
    1997 Jeep Grand Cherokee Limited


    Offline Moparal

    • Permanent Resident
    • *******
    • Posts: 13085
    Re: hardened valve seats
    « Reply #16 on: February 23, 2009 - 02:49:21 PM »
    Rappa440, pictures are worth a thousand words.   My bad, im with Neil and Rappa now. 
    Logged

    Offline usraptr

    • Sr. Member
    • ****
    • Posts: 1814
    Re: hardened valve seats
    « Reply #17 on: February 23, 2009 - 03:35:10 PM »
    Rappa 440,  Thanks for the picture and information.  I'll pull a valve and see what I find.
    Logged
    1970 Plymouth 'Cuda.  Matching numbers 440 U Code, 4 speed pistol grip, Rallye dash, AM 8 Track, Shaker hood, 15 inch rallye wheels, Dana 60 4.10, Super Track Pak.  One of 134 - 440 "U" coupes codes built in 1970 and one of 100 - 440 Super Track Paks built in 1970.

    Restoration pictures at:  http://spanks4thememory.smugmug.com/Cars/70-Cuda/7240639_M24oi#465274575_2MBqW
    (Edited 8-1-17)

    "usraptr" = United States raptor - bird of prey = United States Bald Eagle.  FYI, somebody else thought of it first so I had to drop the "O" in raptor.

    Offline Roppa440

    • Full Member
    • ***
    • Posts: 501
    Re: hardened valve seats
    « Reply #18 on: February 23, 2009 - 03:53:09 PM »
    Rappa?

    More of a soul man myself. :lol:
    Logged
    Dave
    1970 Challenger R/T
    1997 Jeep Grand Cherokee Limited

    Offline usraptr

    • Sr. Member
    • ****
    • Posts: 1814
    Re: hardened valve seats
    « Reply #19 on: February 25, 2009 - 09:03:07 PM »
    Well Roppa wins the gold star!! :cheers:  Removed an exhaust valve and there is no seat in there.  Attached a couple of pictures however I'm not sure how well they show that there is no seat.  Guess I'll just run lead additive in the gas.  Probably won't drive it more than a couple thousand miles, if that many, each year anyway.  Thanks for all the advice. 
    Logged
    1970 Plymouth 'Cuda.  Matching numbers 440 U Code, 4 speed pistol grip, Rallye dash, AM 8 Track, Shaker hood, 15 inch rallye wheels, Dana 60 4.10, Super Track Pak.  One of 134 - 440 "U" coupes codes built in 1970 and one of 100 - 440 Super Track Paks built in 1970.

    Restoration pictures at:  http://spanks4thememory.smugmug.com/Cars/70-Cuda/7240639_M24oi#465274575_2MBqW
    (Edited 8-1-17)

    "usraptr" = United States raptor - bird of prey = United States Bald Eagle.  FYI, somebody else thought of it first so I had to drop the "O" in raptor.

    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
    • *****
    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: hardened valve seats
    « Reply #20 on: February 26, 2009 - 03:45:13 AM »
    Definatly no seat , I would look into the cost to do them though seeing as the heads are off now , you could open them up to 1.81 while you are at it
    Logged

    Challenger - You`ll wish You Hadn`t

    Offline usraptr

    • Sr. Member
    • ****
    • Posts: 1814
    Re: hardened valve seats
    « Reply #21 on: February 26, 2009 - 10:45:12 AM »
    Good point,  I'll do that.   If they opened them up, wouldn't that involve all new valves too?
    Logged
    1970 Plymouth 'Cuda.  Matching numbers 440 U Code, 4 speed pistol grip, Rallye dash, AM 8 Track, Shaker hood, 15 inch rallye wheels, Dana 60 4.10, Super Track Pak.  One of 134 - 440 "U" coupes codes built in 1970 and one of 100 - 440 Super Track Paks built in 1970.

    Restoration pictures at:  http://spanks4thememory.smugmug.com/Cars/70-Cuda/7240639_M24oi#465274575_2MBqW
    (Edited 8-1-17)

    "usraptr" = United States raptor - bird of prey = United States Bald Eagle.  FYI, somebody else thought of it first so I had to drop the "O" in raptor.

    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
    • *****
    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: hardened valve seats
    « Reply #22 on: February 26, 2009 - 12:39:28 PM »
    yes you would need the larger valves
    Logged

    Challenger - You`ll wish You Hadn`t

    Offline MEK-Dangerfield

    • C-C.com Expert
    • ********
    • Posts: 20946
    • I don't get NO respect! Member since 1/25/2002
    Re: hardened valve seats
    « Reply #23 on: February 26, 2009 - 09:07:03 PM »
    Quote from: Chryco Psycho on February 26, 2009 - 12:39:28 PM
    yes you would need the larger valves

    More flow.....More juice to the goose.   :thumbsup:
    Logged

    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline femtnmax

    • Full Member
    • ***
    • Posts: 997
    Re: hardened valve seats
    « Reply #24 on: February 26, 2009 - 10:43:47 PM »
    If your looking for more flow with larger valves, consider some port work on your big block heads following David Vizard's 3 part article in Mopar Muscle Magazine.  He comments on what valve sizes work, and debunks some myths on BB mopar oem heads.  You could do the work yourself, just take your time and measure often.

      Part one: A Study Of The Flow Characteristics Of Stock, Big-Block Cylinder Heads
      http://www.moparmusclemagazine.com/techarticles/5115_cylinder_heads/index.html

      Part two:  Intake Ports, Seats, and Combustion Chamber Mods
      http://www.moparmusclemagazine.com/techarticles/5118_cylinder_heads_ii/index.html

      Part three:  Grinding On Big-Block Exhaust Ports Garners Big Gains
      http://www.moparmusclemagazine.com/techarticles/5120_cylinder_heads_iii/index.html

     D. Vizard has written many good performance books.   Air flow is airflow.  Excellent reading is his book:
    How to Build and Modify Chevrolet Small-Block V-8 Cylinder Heads (Motorbooks Workshop) (Paperback)   available at amazon.com
    Logged
    Phil
    Pages: 1 [2]
    « previous next »