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Thread: 540 WITH MERLIN HEADS AND HOWARDS CRANK AND RODS? ANY GOOD??

  1. #1
    Senior Member SENIOR BUILDER
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    540 WITH MERLIN HEADS AND HOWARDS CRANK AND RODS? ANY GOOD??

    I HAVE RECENTLY BOUGHT A 540 WITH A DART BLOCK, HOWARDS PRO SERIES CRANK, HOWARDE ULTIMATE DUTY RODS, DIAMOND 14.8 PISTONS, MERLIN III AS-CAST HEADS WITH MERLIN X INTAKE AS-CAST, .850-.820 CAMSHAFT, 1150 APD ALKY. CARB.

    ANY IDEAS IF THESE HEADS ARE ANY GOOD IN AS-CAST FORM, THEIR WEBSITE SAYS OVER 800HP AS-CAST.

    I HAVE NEVER RAN THE HOWARDS STUFF, IT ALL LOOKS GREAT, BUT LOOKS CAN BE DECIVEING AT TIMES......... ANY INPUT ON THIS WOULD BE A HELP.

    COMBO IS GOING IN A FRONT SUSPENDED DRAGSTER WIITH A 6000 STALL CONVERTER. EST. 1/8 E.T. I AM HOPING FOR 4.80'S-4.90'S
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  2. #2
    Senior Member RACING JUNKIE
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    Howards has some good stuff in their pro series, i don't know anything about the Merlin heads but if it will make 800 HP, 4.80's/490's is definately in the ball park.

    JMO

    Zip.

  3. #3
    Senior Member SENIOR BUILDER
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    THANKS, THATS ABOUT WHAT I THOUGHT. I HAVE DONE A LITTLE RESEARCH AND HAMMERTIME RECOMENDED THAT I PUT THE 454-R INTAKE ON.
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  4. #4
    Senior Member RACING JUNKIE
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    Re: 540 WITH MERLIN HEADS AND HOWARDS CRANK AND RODS? ANY GO

    Quote Originally Posted by SPEEDNEEDS1
    I HAVE RECENTLY BOUGHT A 540 WITH A DART BLOCK, HOWARDS PRO SERIES CRANK, HOWARDE ULTIMATE DUTY RODS, DIAMOND 14.8 PISTONS, MERLIN III AS-CAST HEADS WITH MERLIN X INTAKE AS-CAST, .850-.820 CAMSHAFT, 1150 APD ALKY. CARB.

    ANY IDEAS IF THESE HEADS ARE ANY GOOD IN AS-CAST FORM, THEIR WEBSITE SAYS OVER 800HP AS-CAST.

    I HAVE NEVER RAN THE HOWARDS STUFF, IT ALL LOOKS GREAT, BUT LOOKS CAN BE DECIVEING AT TIMES......... ANY INPUT ON THIS WOULD BE A HELP.

    COMBO IS GOING IN A FRONT SUSPENDED DRAGSTER WIITH A 6000 STALL CONVERTER. EST. 1/8 E.T. I AM HOPING FOR 4.80'S-4.90'S

    You'll have no problem getting to that et.
    David Lanning
    IHRA NHRA 387B

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

  5. #5
    Senior Member MASTER BUILDER
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    x2 with Zip on the howards products! We ran them heads back in the day on a 540 they worked well with the combo we had, Your combo has little higher compression, a slightly different camshaft and we were running a team G intake. Motor was in a 3400lb chevelle, its best pass was a 10.10

  6. #6
    Senior Member RACING JUNKIE TheRabbit's Avatar
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    I had a set of World Products heads on my 548. They did make 868hp, but they were ported to the max by Race Flow Development (Flowed 400cfm) I had a Profiler intake on the motor.

  7. #7
    Senior Member SENIOR BUILDER
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    I think that I will go on and put the 454-R on the motor with a carb, then put the injection on later.
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  8. #8
    Senior Member MASTER BUILDER
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    Quote Originally Posted by SPEEDNEEDS1
    I think that I will go on and put the 454-R on the motor

    Good Intake!

  9. #9
    Senior Member SENIOR BUILDER
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    I have ran the 454-R many times on several different engines and rthey all ran well, but the Merlin X is a new design and the same brand as the heads so I thought that the Merlin would better than the 454-R.
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  10. #10
    Senior Member RACING JUNKIE
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    Quote Originally Posted by SPEEDNEEDS1
    I have ran the 454-R many times on several different engines and rthey all ran well, but the Merlin X is a new design and the same brand as the heads so I thought that the Merlin would better than the 454-R.
    Stay with a matched set . . Heads and intake . . best place to start, anyway . .


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