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  1. #1

    Default speed density + cobra intake??

    i have a buddy who is willing to give me a cobra intake and heads from his '89 coupe.....the heads have been mildly ported, but are stock '89 heads....are these upgrades worth the swap, will they work with speed density. i plan on upgrading to mass air, but not yet as my project is on the back burner right now. my '86 is bone stock right now.

  2. #2
    FEP Power Member
    Join Date
    Oct 2004
    Location
    Moyock, NC - (Hampton Roads)
    Posts
    1,093

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    E7 heads are always a 50/50 clearance chance. Check first....

  3. #3
    FEP Member
    Join Date
    Apr 2006
    Location
    Hortonville,WI
    Posts
    319

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    They will work fine as long as the PTV is safe. I just put gt40 heads and Edelbrock intake on my 86 and have not had any running issues yet. Course the longest it's run so far was idling for 15 min in my driveway. BTW, I have after market pistons so PTV wasn't an issue for me.
    "The fact that "replica" is written down the side of your gun, and "Desert Eagle point five oh" is written on the side of mine, should precipitate your balls into shrinking!"

  4. #4

    Default

    you'll be fine...I run gt40p heads, a ported explorer intake, 65mm throttle body, and full bolt ons with speed density, and I don't even get the idle hunt. I do plan on swapping to mass air still (want to swap the cam out). speed density will handle pretty much anything other than a cam swap.
    Jeremy
    -86 mustang SSP X CHP Unit # 3788-bone stock & staying that way
    -66 Mustang, bench seat car,8.8,t5 fuel injected 92 engine
    -72 Maverick 5.0 resto in process
    -12SS Camaro 6 speed. 600 FWHP, Kraftwerks Supercharger
    -03 z71 Avalanche 9" lift on 35s Daily Driven 20k a year. 290k miles at 11.8 mpg
    Entire 1986 electrical and vacuum troubleshooting manual download
    http://slantnosefox.com/picturehosti...g%20manual.zip

  5. #5
    FEP Power Member
    Join Date
    Oct 2004
    Location
    Moyock, NC - (Hampton Roads)
    Posts
    1,093

    Default

    Yeah but - if you guys signatures are accurate above, you all don't have 86 stock pistons, so of course you will no clearance problems. It is of my understanding that the original gentleman's block has stock 86 pistons (which we all know has no valve reliefs).

  6. #6

    Default

    lol, good catch...I skipped right over that detail.

    None of that stuff is gonna work for him (well the intake will)

    sorry buddy, swap out the shortblock.
    Jeremy
    -86 mustang SSP X CHP Unit # 3788-bone stock & staying that way
    -66 Mustang, bench seat car,8.8,t5 fuel injected 92 engine
    -72 Maverick 5.0 resto in process
    -12SS Camaro 6 speed. 600 FWHP, Kraftwerks Supercharger
    -03 z71 Avalanche 9" lift on 35s Daily Driven 20k a year. 290k miles at 11.8 mpg
    Entire 1986 electrical and vacuum troubleshooting manual download
    http://slantnosefox.com/picturehosti...g%20manual.zip

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