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I cannot believe that I can't find a .060 oversized forged piston for a 400 with the stock pin location and 9:1 compression that doesn't cost $800.00!!!


HEEELP!!

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$800 sounds like a custom piston. You'll end up an expensive piston on top of fairly short stock rods, a cast iron crank and a possibly thin wall block and 40_ cubes... not the optimal setup.

If you want to keep cost really low you could use a cast replacement piston and limit boost to 5-7 lbs. Then once you get the setup dialed in build a bigger/stronger lowdeck.

Or get a 451 stroker kit with a shelf forged piston from 440 source or another vendor. You would have a stonger crank and rods plus more cubes without a lot more money.

Whatever direction you take, at 60 over with boost I'd get the block sonic checked and don't be surprised if it needs a sleeve or two due to thin cylinder walls.

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I have a question concerning the differences between a piston from a 400 B engine and a 440 BR engine..

I have been doin a bit of research and have noticed that the 400 piston at 4.34 is a bit larger than the 440 piston at 4.32.

My question,
Is the pin location in the same spot between the two??

Do they make a .080 oversized for the 440?

I cannot believe that I can't find a .060 oversized forged piston for a 400 with the stock pin location and 9:1 compression that doesn't cost $800.00!!!

Trying to do a "Budget" build 400 with a 80mm B/W S480 turbo. First engine is a test to see what it will be able to endure..

HEEELP!!

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You need to have that block sonic checked before you go any further , if it has to go to .060 andthe walls aren't really thick enough because of core shift or ? , you'll be dollars ahead starting with another block .

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Its at the machine shop now. I am sure he will do what is required.

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Did you tell him to sonic check it? Cause if your gonna assume he'll check it.......................

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Its at the machine shop now. I am sure he will do what is required.

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Did you tell him to sonic check it? Cause if your gonna assume he'll check it.......................

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Does this engine NEED to go out to .060 ?

There is no such thing as an .080 over 440 piston because the walls will be paper thin in spots at that overbore.

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Did you tell him to sonic check it? Cause if your gonna assume he'll check it.......................

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Does this engine NEED to go out to .060 ?

There is no such thing as an .080 over 440 piston because the walls will be paper thin in spots at that overbore.

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These guys are mopar gurus. I just spoke with them and he confirmed they will check it.

This block is already .040 over with a good ridge at the top of the cylinders.

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I cannot believe that I can't find a .060 oversized forged piston for a 400 with the stock pin location and 9:1 compression that doesn't cost $800.00!!!


HEEELP!!

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That's because such a piston does not exist , especially in a forged unit, stock pin location on a 400 is more like 7.5/8.1 if you are lucky.

Contact member Performance Only , he's a WD for diamond , they'll MAKE you the piston you need .

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I cannot believe that I can't find a .060 oversized forged piston for a 400 with the stock pin location and 9:1 compression that doesn't cost $800.00!!!


HEEELP!!

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That's because such a piston does not exist , especially in a forged unit, stock pin location on a 400 is more like 7.5/8.1 if you are lucky.

Contact member Performance Only , he's a WD for diamond , they'll MAKE you the piston you need .

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Agree. Dan @ Performance Only supplied my pistons for a custom 361 deal and was a true gentleman to deal with, and I would absolutely suggest getting in touch with him. Great prices.
Pat

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