300 head porting

Discussion in 'Small Block Tech' started by rickli, Feb 11, 2007.

  1. NixVegaGT

    NixVegaGT Well-Known Member

    Tony, I forgot to ask you, where did you get the 4.6 block?

    To the rest of the list: SOrry I don't have info on the assembly so far. I'm still too focused on trying to finish the chassis. It should go pretty quick once I get started though. Everything has been blueprinted and pre-assembled... I've still got to fab an intake plenum too...

    As soon as I get to the assembly I'll link to my build site with successes and problems... Thanks for everyone's patience on this.


    600hp! WOW. I'm just shooting for 275.
     
  2. hoffbug

    hoffbug Well-Known Member

    Tidewater Rovers in North Carolina.
     
  3. hoffbug

    hoffbug Well-Known Member

    I just thought Id offer this up to the thread. I received a reply from Woody.

    "Mine are milled to 49cc, my engine shop said you be able to remove 20-30 Thous. without running into intake problems."
     
  4. Nothingface5384

    Nothingface5384 Detail To Oil - Car Care

    stupid question but can you use stock iron 300 valves for the alumin head, as i read somewhere the 300 al heads had smaller valves then the 300 iron head?
     
  5. NixVegaGT

    NixVegaGT Well-Known Member

    I'm pretty sure the valves are the same. Anyone else? I'll see what I can find out.
     
  6. Jim Blackwood

    Jim Blackwood Well-Known Member

    The iron heads have bigger valves. I don't have the sizes, but there's a pretty big difference in them.

    Jim
     
  7. hoffbug

    hoffbug Well-Known Member

    We were playing around with a crusty head I sliced up yesterday... The intakes look pretty straight foreward but the exhausts are pretty restrictive.. we did a layout and welded up the port floor and raised the roof.. man did that ever straighten it out.. we are going to do some baseline testing with a stock port and then start modeling with a full port with clay to build up the floor and raise the roof in layers to see where that gets us.
     

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