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Thread: Would like some feed back

  1. #1
    CMC Newbie CMC Newbie!
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    Default Would like some feed back

    I am building my 347 stroker and would like to get some feed back on what I should put to get more power out of it. I have the stock block from an 89 mustang bottom end is forged. Also I had Edelbrock performer heads ,I just got a Holley systemax intake I think this would do better than the stock cobra intake it has now and short tube headers my question is what size injectors I should put in it , what size headers and throttle body size? Last time I got it dynoed I got 446 hp to the wheels but the car didnít feel strong some this years winter project is to put it all together.I wanna maximize all the power i can get . Thanks


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  2. #2
    Senior Member CMC CobraJet JK564's Avatar
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    Naturally aspirated?


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    ^ Amateur Using Nitrous Oxide CMC Event Coordinator MGLT's Avatar
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    Welcome to the club!

    Is your engine naturally aspirated? 446 rwhp is strong for an N/A 347.

    At that power level, I would do 42 lb injectors for an N/A setup and 60 lb injectors if it is supercharged or turbo'd. The Holley Systemax is one of the best EFI intakes for street/strip builds. With that intake, I would go with a 75 mm Accufab throttle body. With a 75 mm, you may have to open up the inlet of the intake manifold very slightly to match the opening of the throttle body.
    -Matt

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    1990 Mustang 5.0 LX - Round the block race car
    1988 Mustang 5.0 GT

  4. #4
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    It has the vortech supercharger I have the dished pistons on it a cam for supercharged application when it was dynoed last time it has 44lbs injectors but I didnít feel like it was breathing correctly thatís why I bought the Holley


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    Senior Member CMC CobraJet JK564's Avatar
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    I would talk to a tuner but I think youíll be fine running 60s


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    Do you know of any tours around our area


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    Senior Member CMC CobraJet JK564's Avatar
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    Check out the sponsors page, but DynotuneMP is a popular one and is also a CMC sponsor


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  8. #8
    Custom Tuner CMC Sponsor DynotuneMP's Avatar
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    60lb inj for sure. How much boost are you running and what is the compression ratio? There are a ton of guys making 500 to the tire on 302 motors so your current parts should work fine unless there is more to the story.
    www.DynotuneMP.com

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    Just 30 years of slavery remain. CMC Boss460 03RedFireGT's Avatar
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    Welcome to CMC

  10. #10
    My divorce gift to myself CMC CobraJet 45th Stang's Avatar
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    Welcome to CMC

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