7.3 Godzilla in a GT40
Laughing Gas
Joined: Aug 2018
Posts: 942
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Now that Ford Performance is offering a 7.3 block without the deck groove in between the cylinders, I sure we're going to see more higher horsepower Godzilla's. Based on a couple YouTube videos I watched at least one (there was mention of two others) aftermarket vendor is working on new heads. The future looks good for the 7.3.
Logistics Pro
Joined: May 2022
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Now that Ford Performance is offering a 7.3 block without the deck groove in between the cylinders, I sure we're going to see more higher horsepower Godzilla's. Based on a couple YouTube videos I watched at least one (there was mention of two others) aftermarket vendor is working on new heads. The future looks good for the 7.3.
Laughing Gas
Joined: Aug 2018
Posts: 942
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You may want to watch the latest Revan/Brian Wolfe video. Using the original block he's been testing with, they are on the cusp of a N/A 1,000 HP stock block, crank, and heads. Granted they all have been reworked, and the cubic inches are not 445.
Laughing Gas
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Fleet Mechanic
Joined: Jul 2004
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Now that Ford Performance is offering a 7.3 block without the deck groove in between the cylinders, I sure we're going to see more higher horsepower Godzilla's. Based on a couple YouTube videos I watched at least one (there was mention of two others) aftermarket vendor is working on new heads. The future looks good for the 7.3.
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Laughing Gas
Joined: Aug 2018
Posts: 942
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I don't think so. You can buy both blocks from Ford Performance. The block without the slits says in the title 7.3L GAS ENGINE RACE BLOCK.
Official Site of Ford Performance Parts - Mustang Parts, Crate Engines, Packs, Wheels, Superchargers, Racing Parts | Performance Parts Authority
Official Site of Ford Performance Parts - Mustang Parts, Crate Engines, Packs, Wheels, Superchargers, Racing Parts | Performance Parts Authority
Logistics Pro
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I just watched the video about the 472CI Godzilla and it is 4.25 bore so .030 overbore from a stock Godzilla 4.220 and has a stock crank turned with a Honda rod journal to give it more stroke. I would bet you can't reliably/safely go bigger than .030 overbore with a stock block with the coolant cuts between the cylinder walls not to mention the cylinder wall thickness it starts with.
Fleet Mechanic
Joined: Jul 2004
Posts: 1,516
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I just watched the video about the 472CI Godzilla and it is 4.25 bore so .030 overbore from a stock Godzilla 4.220 and has a stock crank turned with a Honda rod journal to give it more stroke. I would bet you can't reliably/safely go bigger than .030 overbore with a stock block with the coolant cuts between the cylinder walls not to mention the cylinder wall thickness it starts with.
For some reason GM saw fit to bless the L8T 6.6L with what is essentially a low-deck LSX race block with the extra head bolts deleted. That block can take a .120" overbore naturally aspirated, but the bore spacing is less than a 7.3L, 4.40" vs. 4.65".
Laughing Gas
Joined: Aug 2018
Posts: 942
Likes: 149
I just watched the video about the 472CI Godzilla and it is 4.25 bore so .030 overbore from a stock Godzilla 4.220 and has a stock crank turned with a Honda rod journal to give it more stroke. I would bet you can't reliably/safely go bigger than .030 overbore with a stock block with the coolant cuts between the cylinder walls not to mention the cylinder wall thickness it starts with.
Fleet Mechanic
Joined: Jul 2004
Posts: 1,516
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It's not like the old days anyway. Low tension piston rings don't wear the cylinder much, you might go 250,000 miles and not have enough wear to require more than a .010" clean-up. I wouldn't call the 7.3L block a 'throw-away', I think in most instances it would be rebuildable once.
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SkySkiJason
1999 - 2003 7.3L Power Stroke Diesel
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Aug 3, 2024 03:05 PM