the 408 lives!

Discussion in '1974 - 1978 Mustang II Talk & Tech' started by 78pinto, May 26, 2005.


  1. Blue Thunder

    Blue Thunder Active Member

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    Sounds hearty. I want to see some burn outs now.

    Hey, what headers are you running? I havent decided on 1 3/4" or 1 7/8" primaries for the 427, but I'm thinking since the most it'll ever see is 6500 rpm, 1 3/4" will be sufficient.
  2. 78pinto

    78pinto New Member

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    that will come......just have to tune it a bit first! I'm on holidays this week so i should be able to get it running proper (efi can be a **** to tune with 42lb injectors on a stock eec) My headers are Hookers i believe, they are small but they'll do for now untill someone makes a nice set in a larger diameter....that i can afford :D I may end up making my own, my buddy and i made a set for his 1000hp naturally asperated 413 cubic inch small block chev Monza Spider. They start out at 2 inch, step to 2 1/8th and then to 2 1/4! They were real fun to build.....not :notnice:
  3. Blue Thunder

    Blue Thunder Active Member

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    I priced up a box of bends and 2 header flanges from Summit, and it was about $400. I just need to get rid of the strut rod assembly under there to make room, because I'm not building headers that run under the crossmember, they're going to snake down between the frame and bell.
    I dread the thought of making them.
  4. 78pinto

    78pinto New Member

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    I hear ya! My buddies cost over a $1000 to build and another $400 just for the collectors! I'll send pics....not a fun job!
  5. Blue Thunder

    Blue Thunder Active Member

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    Maybe since my motor will be a torquer, I can sneak by with some equal-length 1 7/8" shorties. Then just make up a 3" or 3.5" dia. H-pipe for it. :lol:
  6. 78pinto

    78pinto New Member

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    hell, just make a set of zoomies! :D
  7. Blue Thunder

    Blue Thunder Active Member

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    Zoomies sticking straight up through the hood, with a stainless flapper on each pipe.
  8. 78pinto

    78pinto New Member

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    thats the idea! Make sure you send me some pictures! :nice:
  9. 78pinto

    78pinto New Member

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    I'm having a hard time getting my idle to stay set. I'm thinking my Mustang 5 liter A9L computer and 42lb injectors aren't getting along :nonono: I'm taking a look at Megasquirt EFI with ignition control. Looks pretty cool.....and its way cheaper than any of the other aftermarket EFI untits!
  10. Blue Thunder

    Blue Thunder Active Member

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    I can't help much with FI, I'm a carb dude.
  11. dmoody

    dmoody Founding Member

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    Just throwing out some ideas here.... isn't there an idle control sensor? I know at one point my 4.6L would surge at idle a lot and it was caused by the air density sensor being dirty and reading incorrectly.

    d
  12. 78pinto

    78pinto New Member

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    yes, it's called an IAC. Everything works .....i've checked, my injectors are just too big for my EEC to control at idle.

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