Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

head choices

Discussion in 'The Garage' started by mudslinger97116, Sep 17, 2004.

  1. mudslinger97116

    mudslinger97116 1/2 ton status

    Joined:
    Mar 13, 2003
    Posts:
    315
    Likes Received:
    0
    Location:
    F.G.OREGON
    is $800 a good deal on a set of vortec heads that have been opened up a little and stiffer springs?the seller say's he has $1200 in reciets and they are redrilled to be used on new or old sbc.he only ran them 20 minutes.they were built for a blower motor and ended up being to much compresion.do you think that may be to little for a carb only set up?i don't know all the exact measurments sorry.my other choice is to keep my motor as is and use the money to put towards an efi set up.or rebuild my old set of camel humps and run them,are these that much better than stock sbc's? thanks for any help.
     
  2. SUBFAN

    SUBFAN 1/2 ton status

    Joined:
    Mar 23, 2003
    Posts:
    2,334
    Likes Received:
    0
    Location:
    Davenport, Ia
    That is quite a bit for Vortecs. If they are wildly hogged out, they probably would work very good if your motor plans are mild....
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    They won't work with older intakes.

    I'd be leery of these for a truck. How much can you get SDPC2000.com "upgraded" Vortecs for?

    Lots of problems with the guys story, whether true or not. If you are building a motor, how do you not start out with the right compression ratio?

    Why would he drill it for the old intake pattern? The ports don't line up! Only reason I can see for re-drilling them is if you had an aftermarket intake you could portmatch to the Vortecs. It would take a lot of metal, there is a pretty decent port mismatch between the Vortecs and older intakes.

    Vortecs are infinitely better than camel humps in many regards. Vortecs are a good head, (casting-wise) but a factory EFI swap later on is costly with them.

    Not sure if it's consistent across piston designs or not, but 64CC heads with flat top 4 valve relief speed pro pistons is approx. 9.2:1. Shouldn't be a problem on 87 octane.
     
  4. chevy_muscle

    chevy_muscle 1/2 ton status

    Joined:
    Mar 16, 2004
    Posts:
    103
    Likes Received:
    0
    Location:
    Murphy, tx
    [ QUOTE ]
    Not sure if it's consistent across piston designs or not, but 64CC heads with flat top 4 valve relief speed pro pistons is approx. 9.2:1. Shouldn't be a problem on 87 octane.

    [/ QUOTE ]

    This is not always true. Cam duration is very important when choosing what volume heads will work best on a motor and for what octane level (dynmic compression ratio = means everything)
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,982
    Likes Received:
    191
    Location:
    Roy WA
    That is true, however, it's hard to design an engine without basing it on a "static" compression ratio.

    Combustion chamber design is one of the reasons the Vortecs shine...what causes problems on a camel hump head because of compression ratio isn't going to be the same with the fast burn chamber design.
     
  6. Thunder

    Thunder 3/4 ton status

    Joined:
    Jul 20, 2000
    Posts:
    8,946
    Likes Received:
    1
    Location:
    Northeast Nevada
    Keep your Camel humps ! Those vortecs look like someone else's problem. /forums/images/graemlins/eek.gif
     
  7. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    My choice would be Dart Heads but they're not cheap.
     
  8. mudslinger97116

    mudslinger97116 1/2 ton status

    Joined:
    Mar 13, 2003
    Posts:
    315
    Likes Received:
    0
    Location:
    F.G.OREGON
    thanks guy's /forums/images/graemlins/thumb.gif i think i am going to freshen up my camel's and put the money somewhere else in the truck.the guy had these heads built for his 32 chev roadster and i also thought why he would dump so much money into them and end up with the wrong compression for a big ol'blower.maybe he's an idiot or someone took him?
     
  9. k5mike

    k5mike Registered Member

    Joined:
    Jul 31, 2004
    Posts:
    29
    Likes Received:
    0
    Location:
    Houston,Tx.
    I have a friend that took a pair of vortecs and did a port/ polish and matched them to the intake....lost 50 HP!!
    JUNK...this may be what the guy is tring to pass off onto you...
     
  10. darkshadow

    darkshadow 1 ton status

    Joined:
    Dec 6, 2003
    Posts:
    12,250
    Likes Received:
    0
    Location:
    C-eh-N-eh-D-eh
    summit has alum sbc heads for 900 i think /forums/images/graemlins/waytogo.gif
     
  11. mudslinger97116

    mudslinger97116 1/2 ton status

    Joined:
    Mar 13, 2003
    Posts:
    315
    Likes Received:
    0
    Location:
    F.G.OREGON
    yea he said there all ported and polished and i could run a real healthy cam. i don't know alot about motors but i do know i want reliabilty first then low end and let horse power fall where it does.
     
  12. garlicbreath

    garlicbreath 1/2 ton status

    Joined:
    May 17, 2003
    Posts:
    1,136
    Likes Received:
    0
    Location:
    Denver
    I put Sportsman II 200cc heads on my roller 350 and they are AWESOME. 900, complete, new, with roller 1.47 roller springs. Buy new, if you were talking 300, I would say you might make em work, but for 800, buy new aftermarket heads for a little more.
     

Share This Page