GT40 head/intake swap done... ask questions now while still fresh in my memory PICS!

Discussion in '94-95 5.0 - Specific' started by Dugzy33, Dec 27, 2014.

  1. Dugzy33

    Dugzy33 Member

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    Well its been about two weeks and everything is running smoothly.
    Car runs great.
    Idles nice
    good power bump


    Got gt40 heads and intake from a 1996 explorer Heads rebuilt, no resurfacing.
    professional products 70mm TB
    trick flow sn95 elbow
    fox valve covers (longer bolts required to bolt to heads)
    arp head bolts
    arp intake bolts
    new plugs for gt40 heads

    [​IMG]

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    Don't worry about the hole in the middle of the intake...
    this gasket is fine.
    The gasket set is from a 95 cobra
    [​IMG]

    reconditioned the injectors
    like 2.50 each for the o rings and cap

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    i cleaned all surfaces with a flat razor blade and acetone
    vacuumed out all the junk with a shop vac

    kept push-rods and rockers in same order as before with egg crates and a box with holes poked in it.
    just number everything on the box and egg crates
    i didn't change the cam so the same push-rods and rocker arms worked fine on a budget

    [​IMG]


    had to skinny wheel a 3/8 chunk of the egr off to clear fox valve covers
    also the trick flow elbow had this already cut off as it was used
    drilled hole through both and essentially moved the lower bolt up to secure them together

    [​IMG]

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    used this next picture as a guide to plug and or connect the vac lines from the upper intake to the existing lines
    get some extra vac line hose in the 2 sizes and use bolts to plug the ones not needed

    [​IMG]


    I had to remove one of the alternator bolts and replace it with a machine screw to fit with the fox valve covers
    (these are the 3 bolts that actually hold the alternator case together)

    Final product

    [​IMG]


    I left the egr valve connected but ditched the smog pump and tubing associated with the smog pump.
    got a shorter belt from auto zone (search belt routing to find the right size)
    put a bolt in the line that goes from smog pump to h pipe.
    previous owner used high temp hose as connection from hard line under car to hard line on h pipe.
    that is where i put the bolt and used a clamp to hold it tight.
    my new TB and cold air kit just missed the oil fill tube, so i didn't have to modify that.

    marked dizzy before i started
    never rotated engine
    put dizzy back in the way she came out
    fired right up when i was done

    marked balancer
    got car up to temp
    pulled spout connector
    set timing to factory for now
    done
    runs great!

    That is all I can think of now, any questions let me know
    And thanks for all the help from you all during the swap
    Doug
     
  2. Dugzy33

    Dugzy33 Member

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    A few more pics


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  3. 5-oh-MUSTANG

    5-oh-MUSTANG Well-Known Member

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    Great Job! Once im done with my exterior and interior im gonna do a gt40 head and intake swap like this. Hows it feel after the swap and keeping the stock cam?
     
  4. Dugzy33

    Dugzy33 Member

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    I dont have any proof from a dyno or drag strip times but
    she pulls harder sooner and stays in the power possibly a little longer
    same animal just meaner
    sounds a little meaner too.
    not a huge diff but if i had to guess
    my seat of pants says 40-60 hp ish

    I really need to get some gears next especially since I have 2.73's and 18in wheels
    ( that has got to be like a 2.55 effectively! gonna get 3.73's)
     
  5. ElrodKTPQ_89

    ElrodKTPQ_89 Legend

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    Everything looks good man! I wish I had a set of heads when I did my cobra intake and roller rocker swap! I've never done any research on it but what's the purpose of the MSD 6A box?
     
  6. CC'S95GT

    CC'S95GT Legend

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    Looks great. Hopefully I'll be doing the same thing this summer.
     
  7. Dugzy33

    Dugzy33 Member

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    I was trying to get more spark
    When I first bought the car it had a cylinder that was fouling the plug on # 7
    figured I'd upgrade ignition, coil and plug wires to get more efficient spark
    didn't seem to help
    didn't hurt though either
    below 3k rmp the box allows multiple spark discharge (MSD)
    the ford duraspark is pretty good
    imo the only weak link for up to 300hp is the plug wires.
    however when i go to a supercharger in the future I have read that a MSD 6al or above is the box to get for adjustability.
    the box I have was probably not needed and it was 200 bucks.

    Turns out the fouling was from a valve seal...
    When I did the gt40 swap all is well.
     
  8. BOOOSTD

    BOOOSTD Active Member

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    Good job and great write up!
     
  9. hotmustang95

    hotmustang95 Active Member

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    Oh man, you are gonna shit yourself when you finally get some gears. Imo it's the mod that makes the biggest difference. My brother bought himself a 94 with a ford racing gt40 grate engine in it but still with stock gears. He swore he could beat my car. After I drove his car I told him no focking way in hell you'll even come close. The car was a dog. After a gear swap to 3.73's the car became an animal and could beat mine in a drag race.
     
  10. Sinned83

    Sinned83 Well-Known Member

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    Glad you shared this. It looks great. What made you keep the stock stick?
     
  11. Dugzy33

    Dugzy33 Member

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    Money
    I did this swap while I was out of work.
    If I had swapped cams I would have had to get new spring kit push rods and might has well gotten new roller rockers

    that would have more than doubled my cost.

    oh then I might as well get a tune with all that changed...

    snowball downhill in just a few steps..

    next thing im not at $550 for what i did.
     
  12. Sinned83

    Sinned83 Well-Known Member

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    That's short $. Good work