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Thread: Fuel inj vs carburator

  1. #1
    Member MASTER JOURNEYMAN
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    Fuel inj vs carburator

    On my newly built truck this year i'll be running Edel pro-flow 2 fuel inj, this is my second pro-flow unit as i ran one on my 383 1/2 ton 4x4 as a daily driver for four years. All drivability factors aside i am curious if you were to take two identical engines one carburated the other fuel injected and both tuned to perfection would the fuel inj engine make more power,same power,less power. The reason i ask is when i go to dyno the engine i'll be using a Victor jr with i believe a 930 BG on my 358 sbc and no i don't think the 930 is to big for the little motor.

  2. #2
    Senior Member RACING JUNKIE
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    No, there wont be much difference in HP if all other variables are identical the torque on the other hand will be a tad higher at least that's what I've gathered after reading a ton this subject.

    I think the drivability is the main deciding factor, if that is a concern, I.E.> cold starts and incliment weather driving.

    And of course theres the extra money involved to go F.I>

    Just my take, Cp.
    ***IN GOD WE TRUST***

  3. #3
    Senior Member RACING JUNKIE oldandtired's Avatar
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    I agree with Cp.

    Perhaps the only thing I will add is that FI has a flatter torque and power curve.

    Dave
    Dave
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    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  4. #4
    Senior Member RACING JUNKIE
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    I am not fimilar with that fuel injection setup but mine the rons injection dominates all carbs that have been on it. By 40hp and 50tq , FI when right should make more power then a carb.
    David Lanning
    IHRA NHRA 387B

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  5. #5
    Senior Member RACING JUNKIE THERATTLER's Avatar
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    WHAT I LIKE ABOUT F.I. IS YOU DON'T HAVE THE STUMBLE PROBLEMS THAT YOU WILL HAVE SOONER OR LATER WITH A CARB...IN OTHER WORDS THE THROTTLE RESPONSE IS MUCH CLEANER WITH F.I. THATS MY $0.02 WORTH,,,,,,,,PAUL
    ***IN GOD WE TRUST***GOD BLESS AMERICA******

  6. #6
    Member MASTER JOURNEYMAN
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    Thanks Guys

    I always kind of thought it was more a drivability factor thing although on my new engine i think it is becoming more a necessity. As i don't have much experience with carburators i've heard they don't respond well with big cams on the street for daily drivers. I noticed one of the comments mentioned flatter tq curve which i'm hopeing to utilize. In your experiences how would you say a carb would respond on the street using a Reed solid roller 262/267 @ 50 618/625 lift 106 with Brodix 11x heads,turbo 400,3200/3500 stall,3.89 gears.

  7. #7
    I think your 930 is way too big, look at a 358 cup engine, that engine turns 9500 and uses a 830, are you going to be making power @ 11000?

  8. #8
    Member MASTER JOURNEYMAN
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    The only reason i'm using the 930 is that is what is available to me for my dyno test as everything else my friends have is larger.If need be i know my friend will have a complete jet kit with him to calm it down.

  9. #9
    Quote Originally Posted by ARUSSELL
    I think your 930 is way too big, look at a 358 cup engine, that engine turns 9500 and uses a 830, are you going to be making power @ 11000?

    That's not by choice...and that's no "regular" 830cfm carb...Imagine the potential with a larger carb...

  10. #10
    Senior Member RACING JUNKIE
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    Quote Originally Posted by stealth20
    Quote Originally Posted by ARUSSELL
    I think your 930 is way too big, look at a 358 cup engine, that engine turns 9500 and uses a 830, are you going to be making power @ 11000?

    That's not by choice...and that's no "regular" 830cfm carb...Imagine the potential with a larger carb...
    very true !!
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com


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