It looks like the Dart cast iron Gen 3 Hemi block is available.

PRI quotes:

“This block will change the game,” promised Mike Sanders. “We’ve added extra cooling capacity and changed the oiling system.”

The new block will not allow MDS (cylinder deactivation) but will be available with or without provisions for variable valve timing (VVT). It also comes with steel four-bolt mains in all five locations and will be available in either a 9.250- or 9.285-inch deck. Maximum bore will be 4.250-inch.

“Now you can build nearly a 500-cubic-inch Gen III Hemi,” Sanders noted. —Mike Magda

Glad someone stepped up and made a siamese bore for these but it looks like a step back from the factory 6 bolt mains? Is the material that much better that they are not needed?

All of the hemi blocks I have messed with were 4 bolt mains. But I could be off base here.

Gen3 hemi is 4 bolt. Must be confused with a ls.

You post a lot about building G3s, have you never been into the bottom end of one?
They are all 2 bolt caps with cross bolts

I believe they are referring to the cap bolts not the spade bolts. MMX sells a cap with 4 bolts and 2 spade bolts. Which most refer to as a 6 bolt cap. Maybe I'm wrong but that is what I thnk.

Good, maybe this even leads to new intake and cylinder head options as well.

Not sure why he keeps saying "can bore to 4.250" 4.20 is max on the block, a 4.250 bore will leave only .105 between cylinder bores......Not good even for siames blocks....... bottom end of the block is thicker where the Main studs go in no "shelf" tpe casting... still only two in the cap and two cross bolts....the ONLY 6bolt G3 (4 cap ,2 cross) were the Mclaren Alum block for the ill fated 5.0 liter program in 04-06 ...

There are some big advantage with this block
1) it has two extra Head bolts , per cylinder one @ 12 o'clock and one @ 6 o'clock. Like some of the Aftermarket LS blocks........ it's a true 6 head bolts per cylinder can you say 30+lbs of BOOST
2) the Water Jacket it's more like the BGE/Hellcat and less like the Eagle 5.7 and the 5.7/6.1 block.
3) the Lifter oil galleys(passages) connect all 8 on the same bank...the OEM blocks are split in to 4 sections of 4.
4) unlike the BGE block is it a true siamese bore, BGE block has a ridge from the floor of the water jacket up to about an inch in height connecting the cylinders.
the deck is .10 thicker then the 6.1 block @ the 9.25 deck height and .135 thicker then the stock BGE at the 9.285 Height.

Bad news...it's still tight in the crank area for anything over 4.125 stroke....4.08 still needs a little notching for the oil cross passage on the passenger side rear oil drain back and major surgery for the 4.125 and larger stroke.

for the NON-VVT crowd it's basically a BGE version of the old 6.1 block.....Better cooling, thicker deck and cylinder walls that don't move around above 18lbs of Boost. .(it's the Block you Need Dragula for your Eddelbrock heads)
HP wise...BGE's will go 1500 with good caps. and 4.10 max bore, 1300/1400 with 4.125-4.165 before the break...these should go 1800 at least with a good tune and 4.10 bore..not sure how well they'll take a 4.20 bore and BIG boost.

BMP Alum Block is going to drop some time around late October and early December....that will be a real game changer .......I haven't talked to Darren @ KB in a while I know they are close to releasing their block.
Future is looking a little brighter for the G3 crowd.......there will be 4 Alum block options this time next year...now how long will they stay in production.....I don't know.

Next up is a Head that'll flow....VERY well....I mean VERY well...Think AJPE or Frankenstein P48 Hemi well....and true 6 bolt around the cylinder and uses 5.60-5.80 length valves......Not 5.14

Your right, I just got done building an aluminum 3.5 V6 that had 6 bolts and had that in mind. I was doing a bunch of research thinking about building it into a 4.0 V6 so that was on my brain. Still seems like it would have been a good idea for a motor that could go past 1000 HP like a new hemi block should be able to go.

I might have to order one of those, although, I would want to run a 4.25 crank in it if possible.

4.25 crank fits , lots of work, but it fits with the 4.20 Bore and a 4.25 crank puts you@ 471 CI

That would be a beast of a G3

See the new pushrod Fleet engine by ford?
445 CID
4.220 bore and a 3.9 something stroke.
It looks like a cross between a G3 and LS lol
I know nobody cares but maybe Fiat will respond to this?
But I'm thinking that the current G3 BGE casting would not support a big bore. It would need a total redesign.
Crate engine starts at 7,800.00 IIRC

The hemi valve arrangement don't need as big a bore as a wedge to flow the same amount of air, they could easily extend the 392 deck a half inch and stroke to 4.0 and bore to 4.125 to get close enough and make it industrial kind of sturdy, make the displacement come out to 426. This taller deck configuration would also allow even longer intake runners for more TQ and with existing BGE heads make plenty of power to compete with the ferd. Small bore long stroke is also a better way to get past emissions.

Ford pretty much owns the commercial market that engine is used for, shuttle buses, RV's etc. Dodge gave up on that market years ago so I wouldn't expect much from them.

I wonder if this is cast grey iron or the better cast ductile iron?
Time to make the call to find out I guess

Both have their advantages,

Gray dampens vibrations better, machines better, cheaper to manufacture , better thermal conductivity,(transferring combustion heat to water jacket) oddly , its stiffer then ductile, which also means it's brittle compared to Ductile.
Ductile ...has a greater tensile strength, impact and fatigue resistance
High end cylinder sleeves are made from Ductile, while stock or lower end sleeves are gray ... "dry sleeves" are almost always made from gray, a lot of your "wet" sleeves are made from ductile.

The G3 blocks have one of the higher nickel contents in the OEM engine blocks, highest of any Chrysler block made,.

"dodge" was competitive with the Iron V10 but once DCX took over the writing was on the wall ..I'm guessing they felt it was money wasted to pursue that market any longer....I don't agree

Every .25 inch you raise the deck height of the G3 block it widens the G3 1 inch.....

Mercedes removed Dodge vans and replaced them with sprinters, at least in the shuttle and RV world.



There are some ram based RV's coming back though, but diesels