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306

  1. S

    Requesting Guidance for 306 motor swap - Fuel? - SD? MAF?

    Hello Everybody, Introduction I've recently picked my project car back up. A 1988 LX 5.0 Mustang that’s been in my family for over 30 years! It was also my first car back in high school (2012), and it holds a lot of sentimental value. Now, I’m aiming to finally complete the build over the next...
    • So_Flo
    • Thread
    • Jul 26, 2025
    • 302 rebuild 306 foxbody foxbody 5.0 fuel injectors mass air flow mass air flow sensor motor swap speed density vortech
    • Replies: 32
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  2. B

    86' 4 eye 306 carb. Built. Overheating

    Ok, I bought me a 86 mustang with a 306 carb engine. Holley 4 bbl, edelbrock performer air gap intake, gt40 heads with comp cam alumi saver roller rockers 1.6, edelbrock long tube 4 to 1 headers into single chamber flows. That being said I purchased the car with an overheating problem. The...
    • Bigred86foureye
    • Thread
    • Oct 29, 2018
    • 306 4eye all new cooling carb 306 fox body gt40 heads new heads overheating
    • Replies: 40
    • Forum: Fox 5.0 Mustang Tech
  3. J

    91 Mustang 5.0

    Hey guys! Im new here and have a few questions. First off i just bought a 91 Foxbody lx 5.0 bored .30 over to a 306. The car has a mild cam. I live in Cincinnati, Ohio so the weather is cold right now. When I fire the car up it will surge from 750 rpm to around 1500 rpm. I know part of this is...
    • Joey Ison
    • Thread
    • Jan 23, 2018
    • 306 5.0 foxbody lx
    • Replies: 5
    • Forum: Fox 5.0 Mustang Tech
  4. 306 Turbo Or 357

    I am undecided. I currently have a 306 where I'm having some issues with. ( Oil and gas leaking from throttle body onto valve cover). So I will be pulling out the engine and rebuilding the motor. At that time I would like to go Turbo with an on3 performance kit 66mm. Or there is a new 351...
    • Xterminator03
    • Thread
    • Jun 4, 2017
    • 306 351w holley systemax turbo
    • Replies: 14
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  5. Fox Swapping Foxes

    Howdy guys and gals. Was building a 1988 GT but with the amount of body work it needed I was over whelmed and come to find out the frame had been tweaked in previous owner ship. So with a lot of wheeling dealing and a good buddy of mine. I'm trading a used set of cast aluminum heads pre 2001...
    • 88mustang on a budget
    • Thread
    • Jun 30, 2016
    • 306 budget gone fox friends
    • Replies: 38
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  6. Engine Timing Issues

    Hello I have an 88 mustang timing is set at 12 btdc was running good now wont start unless distributor is really advanced, pings at 3k rpm and when retarded starts missing at 3k rpm/ sputters Ive replaced: Distributor, Plugs & wires Ignition coil Put a9l ecu in, when I received the car it had...
    • 885.0h
    • Thread
    • Jun 27, 2016
    • 306 gt40p rebuild timing issue
    • Replies: 10
    • Forum: Fox 5.0 Mustang Tech
  7. F

    Fox V8 Swapped 4cyl Car Suspension???

    i have a 1989 mustang coupe that was originally 4 cyl swapped to a 306. It rides like a ton of bricks. Can't tell if the original owner cut the springs or if the shocks are shot. But I want to upgrade to a good setup but all the ones I see are for a 5.0. Cool. What do I have to change to make...
    • Fox89Coupe
    • Thread
    • May 3, 2016
    • 1989 306 4cyl coupe suspension struts shocks bushings
    • Replies: 6
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  8. B

    New To The Foxbody World

    I just bought a 1991 lx mustang with a 306 crate motor, gt40p heads, a ford motor sports e cam, ford motor sports 24 lb injectors, gt40 intake upper and lower, 73mm throttle body, rebuilt t5 with brand new motor sports clutch. 373 gears, it has a front k member with coil overs flaming river...
    • b_reggie
    • Thread
    • Apr 3, 2016
    • 1991 306 foxbody lx gt new performance upgrades
    • Replies: 2
    • Forum: 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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