How I can make a 454 to 540?
 

If some one can help to make my 454 mpi to 540 or tell me the parts that I need?

You can't.....not without spending stupid money. It would cost less to buy one and sell yours. The intake, heads, crank, rod, pistons, fuel supply, exhaust, ignition would all have to be replaced.....the block is really all your re-using.

not if your doing a stroked 540 short deck motor. but im not sure if you can stroke a 454 or if it can only be done on a 502 based block. im pretty sure you can remap the computer but not sure if the fuel supply pump is big enough.

Not many 454 (if any at all) blocks have the wall thickness to bore to 4.500. You can put the same 4.25" stroke crank though and have a 496 if you bore to 4.310.

You need to start over. I had a 502mpi in a donzi and when I wanted to go to a 540 short deck I needed to start fresh. The bore needed is too much for a standard block and the stroke will side load the cylinder walls more than any decent engine builder would recommend.(IMO)

you aint makin 540 with 454 block..... lil red nailed it!!

yep can't do it 454 don't have enough meat have to start with a 502 block.

a 540 is 4.500 bore x 4.25 stroke that's only .030 over for a 502. Not sure about the stroke/side load part either I would think that would be more of a rod/stroke ratio issue than bore/stroke.

Agreed. Any 502 block can be bored .030 over without issues.

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.

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.

what was the bore&stroke of this 565 gm talldeck truck block?

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.

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.

Sounds like 4.350 x 4.75 in a tall deck.

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

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.

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!!

I have spent hours researching and looking at data and dyno sheets for the best engine combo for my needs. A 540 size motor will need to have a good( expensive) exhaust to see the full potential of all those cubes. Of course a full rollerized cam and valvetran is required that is matched to your exhaust. I chose to go with a 502 as I am using a 496 aluminm exhaust with a 114LSA cam. I want to be able to have a stable idle for good dock manners with no reversion problems with the stock exhaust. RPM dual plane intake outpowers the single plane until around 5,200 rpm for milder engines. Making 550HP with such a combo is not that hard to do so I would say get a good 4.25 crank kit for your 454 and let it rip! A 540 with nice headers, cam, single plane intake and dominator can make an easy 650-700 HP all day long but then you are now worried about your Bravo drive staying together? What are your goals? TBF