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How I can make a 454 to 540?

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Old 11-02-2013, 04:44 AM
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Most inches I have ever actually saw in a Std. deck GM 454 block is 526. That was 4.375 bore and 4.375 stroke. It was for a sled pulling truck that the rules limited you to a factory Std. deck block.
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Old 11-02-2013, 09:15 AM
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Running a internally balanced 4.25 crank requires going to 6.385 or longer rods to clear the counterweights which helps rod/stroke ratio and piston side load issues. Going to the 6.535 rod with the 4.25 stroke results in a better rod/stroke ratio than a stock 454 or 502 but works best in a tall deck block. Scat did make a cast externally balanced 4.25 crank that worked with 6.135 rods but I don't know of anyone actually running one.

There are tons of GM blocked 540's out there but that's not to say that a Dart block isn't the way to go if you are starting from scratch. I think it is safe to say that not one of those 540's started with a 454 block. I did however know of a 565 that started out as a GM 427 tall deck truck block.
what was the bore&stroke of this 565 gm talldeck truck block?
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Old 11-02-2013, 09:41 AM
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Yup ....you cant bore it that much. You can still make nice power out of your 454 if you have top shelf parts and the right components turning 6000rpms. My 454 was bored .30 over and makes 603hp/590 tq at 6000rpms.
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Old 11-02-2013, 10:22 AM
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Yup ....you cant bore it that much. You can still make nice power out of your 454 if you have top shelf parts and the right components turning 6000rpms. My 454 was bored .30 over and makes 603hp/590 tq at 6000rpms.
nice ,can you tell us what parts your engine has and what compression ratio it is.
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Old 11-02-2013, 10:41 AM
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Also can you tell us what fuel set up you are running along with is this EFI or carb motor. Also is this a NA engine only.

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Old 11-02-2013, 02:19 PM
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what was the bore&stroke of this 565 gm talldeck truck block?
Sounds like 4.350 x 4.75 in a tall deck.
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Old 11-02-2013, 02:34 PM
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what was the bore&stroke of this 565 gm talldeck truck block?
The bore was 4.350 and somehow he stuffed a 4.75 stroke crank in it....... I know, I know its not suppose to be possible and I wouldn't have believed it unless I saw it myself. The engine builder who pulled this off who is no longer in business due to illness ( I would rather not mention names) told me he had done this several times in his 40+ years building engines. He said when selecting a block look at the oil galley plugs along the pan rail. I'm not sure of the exact sizes but the smaller plugs means a smaller oil galley which allows room for a >4.375 stroke crank
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Old 11-02-2013, 07:52 PM
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If some one can help to make my 454 mpi to 540 or tell me the parts that I need?
Put this on and it will run like a 540. http://www.offshoreonly.com/forums/s...ml#post4020863
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Old 11-03-2013, 12:07 AM
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Put this on and it will run like a 540. http://www.offshoreonly.com/forums/s...ml#post4020863
no it wont,it will run circles around a na 540.
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Old 11-03-2013, 09:27 AM
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Common Danny4pair-underwear, don`t let these guys push you around! They can`t agree on anything! You know you can do it so stop asking on the internets machine and get to work! I bet it`ll be an awesome build! Maybe you and Borgy can collaborate.... throw some peanut ports on that bi #@tch and make it scream! Go FOR IT!!
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