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  1. #1
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    Performance diff 2.4 Bridgeport EFI vs 225x ?

    Just curious how much difference there would be.

    Top end, hole shot, gas mileage?

  2. #2
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    Hole shot to the 225X, gas mileage to the 225X, and top end probably exactly the same.

  3. #3
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    On what boat ?
    ARGO Cat 18'
    Mercury 2.4EFI/CLE
    ------------------------------------
    If it's not a cat it's a.............dog ?

  4. #4
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    On an Allison XB 2002.

  5. #5
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    Quote Originally Posted by MStine06 View Post
    Hole shot to the 225X, gas mileage to the 225X, and top end probably exactly the same.
    How do you figure?

    A stock 2.4L Bridgeport EFI is rated at 240hp at 7000 rpm, and is capable of consuming 24+ gallons per hour at wide open throttle.

    If I'm not mistaken, the 225x is slightly heavier (six steel sleeves, correct?) and a lower peak WOT RPM range.

    The 2.5L engine is known for having more bottom-end torque, but the Bridgeport can typically spin a smaller prop to the same top end speed, so this can equal a better holeshot if prop selection allows for it.

    The 225x has a fuel economy advantage.

    (post corrected, 225x is crankcase-injected like 225 Promax)
    Last edited by pyro; 09-14-2012 at 12:16 PM.
    '89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
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  6. #6
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    225x will not need to be rebuild every 100 / 150hrs.,steel sleeves motors good for long time if taken care of right.
    IT AIN'T FAST , IF ITS NOT ALLISOON MAN POWER!!!

  7. #7
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    The 225x is a 3L EFI that weighs 484 lb vs 2.4efi that weighs 110lb less. I'd go with the 2.4efi for top end & gas mileage.
    Not sure hole shot would be much better on the 225x considering the weight difference.
    ARGO Cat 18'
    Mercury 2.4EFI/CLE
    ------------------------------------
    If it's not a cat it's a.............dog ?

  8. #8
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    225x is a 2.5 not a 3 liter. I do know that much. It has the injectors ahead of the reeds, not direct injected like an optimax. It does have an alternator and the down draft plenum like the opti. The Promax 225x is prolly a little heavier than the 2.4.

    Do the Bidgeports need rebuilt like a 280?

    The reason I am asking the question is I have a Promax 225x. I found a XB2002 that has the Bridgeport already on it that I would like to go look at.

  9. #9
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    Allison's run best with a light motor. Run it!!
    '89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
    My YouTube videos________My Flickr photo gallery
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  10. #10
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    The 225x is not a DI engine; just EFI. It was Mercury's "next" after the Pro Max 225. It had the same 2.5L block and porting as the 225 Pro Max, but used the Motorola PCM 555 ignition and electrical/charging system. I have run a few of these, and the poster above who stated that the low end and midrange would go to the 225 was right. However, the Bridgeport would win the top end contest because it would be able to out-rev the 225x with the same props.


    JT

  11. #11
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    Quote Originally Posted by JWTjr. View Post
    The 225x is not a DI engine; just EFI. It was Mercury's "next" after the Pro Max 225. It had the same 2.5L block and porting as the 225 Pro Max, but used the Motorola PCM 555 ignition and electrical/charging system. I have run a few of these, and the poster above who stated that the low end and midrange would go to the 225 was right. However, the Bridgeport would win the top end contest because it would be able to out-rev the 225x with the same props.


    JT


    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  12. #12
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    And to answer your question, no the BP's don't have to be rebuilt as often as the 280's do. More often than the steel sleeve motors but if you use good oil and mix at the right ratio they will last a good while. I have a Bridgeport with six flanged steel sleeves and the pistons are milled and drilled to cool the bridges. It has been a phenominal motor as far as dependability goes and pushes the Vector plenty fast! Has a ton of hrs on it already. Changed heads recently to bump up compression and pistons were still tight in the holes and cylinders were smooth with no sighns of scaring or wear. I use Penzoil synthetic oil and have had no problems yet!!!!!
    86 Hydrostream Vector
    2.4 Bridgeport Offshore Centerhorn EFI

    2007 Regal 2860 express cruiser

    1996 Rinker 260 Fiesta Vee

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  13. #13
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    Quote Originally Posted by MStine06 View Post
    Hole shot to the 225X, gas mileage to the 225X, and top end probably exactly the same.
    I went from a bridgeport efi to a 225x on a 16' checkmate and this statement about sums it up.

    I actually picked up a few mph with the 225x but I think that was mostly due to a couple small setup changes. I'll add the gas milage between the two is quite signifigant...not to mention the oil consumption and good charging system.
    79 Checkmate Predictor 2.4 200, 00 Bullet 20XDC 2.5 280

  14. #14
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    The Bridgeport is a time bomb. Ask any engine builder. I would not have a BP even if it was free. Too costly to rebuild and too often. Go with the the 225x.

  15. #15
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    Hmmm... I've been running the piss out of my re-built Bridgeport for six seasons. It's been through ONE re-build since 1990, and still has original Nicasil bores and factory pistons. I finally had a stator go bad a few weeks ago, but that's the only thing I've ever replaced besides the PCU upgrade. 7200+ rpm every trip out, 8000+ rpm drag racing occasionally with a 22p prop.

    Hot-rod modified Bridgeports with tight heads are time bombs. Older BP's without the bridge cooling update are time-bombs.

    The 225x is still more reliable, more torquey, and has good electronics, but I still stand by my old two-point-four.

    '89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
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