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head question

Discussion in 'The Garage' started by big dan, Feb 10, 2007.

  1. big dan

    big dan 1/2 ton status Premium Member

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    just started working at Oreillys and was talking to a guy last night about the motor I want to build and got on the discussion of bigger heads for more power. he said he knew a guy that had 3 sets of 300 horse heads. I didnt ask cause I didnt want to look retarded but can someone explain to me what 300 horse heads are? are they the old double hump style heads? thanks
     
  2. kwissman

    kwissman 1/2 ton status

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    They are the old double humps etc. Stay away unless you are building a nostagaia motor. Vortec heads will make more power.
     
  3. big dan

    big dan 1/2 ton status Premium Member

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    well the thing is the guy that is selling them builds race cars. hes already had them ported and accessory bolt holes drilled and tapped. If I get them they will be really cheap, like say $100 for a pair and at the most they will need valve springs and seals.

    I know vortecs are better but around here they will cost over $200 a set in the salvage yard and will need the same kind of work and I cant afford a new set.

    Im also not looking to build a power monster so for me it would be a good deal on some heads a little better then the stock ones I have now which is prolly what will stay on the motor if I dont get some others real cheap.
     
  4. boz42

    boz42 1/2 ton status GMOTM Winner

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    u need to be careful & plan on what u want your motor to do. if the heads are heavily ported & have large vavles(more than likely do if a drag racer had them). they will kill your bottom end torque unless u are building a large cubic inch small blk.

    do u want your engine to be in its power ban at off idle to 5000rpm or do u want it to make its power between 2500-6000? the lower rpm numbers are typically better for truck/off road use.
     
  5. 3 on the tree

    3 on the tree 1/2 ton status

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    Another point against; The 300 horse heads were built for leaded gas, so unless they have hardened seats installed, they will not live long on unleaded.:eek1:
     
  6. big dan

    big dan 1/2 ton status Premium Member

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    yes they already have the hardened valve seats and Im looking to build power from about 1500 up to 6500-7000. its not really an offroad truck, may see a few mudholes from time to time but mostly its a street truck that Id like to have decent power.

    I keep my other truck for the hardcore stuff, this one Id like to keep kinda nice for cruising around and taking the ladies out and like I said Im not really looking to build a power monster.
     
  7. dmanblazer

    dmanblazer 1/2 ton status

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    I agree my head tech said you can throw up to $600 bucks at a set of old heads rebuilding them or you can pay $400 for a set of vortex heads that flow much better and are brand new.
     
  8. Leper

    Leper 1/2 ton status

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    Newer usually means better flow when it comes to cylinder heads.

    I was expecting completely different when I looked at the title of this thread.
     

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