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  1. #1
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    hi rise intakes for 300 promax

    anyone tried the mad efi and/or burcato 3.0l merc intake hi rise spacer if so what ya think and get from it?
    i wana use one on 300 promax

  2. #2
    Join Date
    Apr 2001
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    Springfield,La.
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    Laketrash haz a Madd front on a 300PM(well, it iz highly modified now)...When it run's it haulz azz.....I thank most ov the problems he haz wit it iz electrikle compatibility.....Maybe U kan PM him or holler at him!!

  3. #3
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    mad

    i love mine. top end vs stock is a little better, but holeshot and mid rage and acceleration is ten times better. i run a stock 300 pm with a 15" mid on a 20 bass boat. usually turn it 6800 to 7000 all day.

    my .02

    casey

  4. #4
    Join Date
    Dec 2004
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    Key Largo, fl
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    is it ported how are you turning that many rpm's on a 3.0l
    1988 reaction19-sold
    1978 action20 w/ 250 efi-sold
    2003 quartershot T4-sold
    1978 16 action with 15'' 2.4 -sold
    1979 mako21 w/ evinrude 150 faststrike-sold
    1995 18 ACTION COPY w/ CCMS HO2FO!-sold
    1981 24' manta w/ a v8

  5. #5
    Join Date
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    thanks guys for the replys FASTSKEETER which one r u useing mad or burcato
    '

  6. #6
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    mad

    i run the mad. i heard tony's is running excellent as well, i just have not had the chance to try tony's, YET. i had shaune re-calibrate my ecus to waynes specs and then adjusted a few times to fit my boat motor application.

    19, when i drag race a turn a 24 yamaha usually 7200 in the quater on a 1.75 gear, i also run a highly modified hydromotive quad IV and will spin it up to 7000. on the lake i usually run a 28 bullet cut chopper to 6400 and some change. this is a stock 300 block and front half. heads are 148lbs hot, stock cages with TRD reed, light flywheel, alothough the flywheel only helped holeshot, this is set on a 15" mid with wayne's tunner.

    there is a guy out there that has a 3.0l with 2.5 electronics turning 8500 to 9000 on carburators

    hope this helps.

    casey

  7. #7
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    thanks heaps aye

  8. #8
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    wow thanks for the info i thought a 300/250/225 was done making power at around 6200rpm's. how are you still making power that high up with a stock 300pm block uncut.
    1988 reaction19-sold
    1978 action20 w/ 250 efi-sold
    2003 quartershot T4-sold
    1978 16 action with 15'' 2.4 -sold
    1979 mako21 w/ evinrude 150 faststrike-sold
    1995 18 ACTION COPY w/ CCMS HO2FO!-sold
    1981 24' manta w/ a v8

  9. #9
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    feed the motor what it wants when it wants it, and it will spin to your hearts content as long as it has good parts inside.

    i have never dynoed this motor, but if it spins up and does not torch anything, then it is making power. i am no motor guru just my .02 cents.

    casey

  10. #10
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    So In My Application With My 250 Efi Spinning 5800 How Should I Go About Getting More R's From It I Have A Stock Comp And 300 Heads .
    1988 reaction19-sold
    1978 action20 w/ 250 efi-sold
    2003 quartershot T4-sold
    1978 16 action with 15'' 2.4 -sold
    1979 mako21 w/ evinrude 150 faststrike-sold
    1995 18 ACTION COPY w/ CCMS HO2FO!-sold
    1981 24' manta w/ a v8

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