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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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I shift my HEMI at 7,300 and cross the line at 7,600. Car has been 8.46 @ 161 all motor 2 small carbs at 3200 lbs.
just sayin...

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How long after the first Hemi dyno pull did it take Chrysler to discontinue the Max Wedge program?

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I shift my HEMI at 7,300 and cross the line at 7,600. Car has been 8.46 @ 161 all motor 2 small carbs at 3200 lbs.
just sayin...

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Good going Out of interest I shift @ 6700 and cross the line @ 6900 on a good run. Big single Dominator, Car has been 9.57 @ 142.5. Still wouldn't go 8.4,s 600lb lighter though.
Just thought this illustrated the rpm/torque characteristics of the two types of engines. Though I know there is more to it than just head design.

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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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Something interesting about the blocks, Mr Hoover told me that when Packard went out of business Chrysler bought a bunch of tooling and the bore spacing of the B engine actually came from Packard. Thank God they were big powerful cars or we would all be screwed.

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Something interesting about the blocks, Mr Hoover told me that when Packard went out of business Chrysler bought a bunch of tooling and the bore spacing of the B engine actually came from Packard. Thank God they were big powerful cars or we would all be screwed.

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Bore spacing of the Packard V-8 was 5 inches; big-block/hemi mopar is 4.80

I have several Packard V-8's; their general layout is more closely related to the early Olds/Cadillac/Studebaker V-8's than to the Mopar wedge V-8's. I can't imagine what Packard V-8 tooling could have been used on any Mopar engine.

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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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I think what this poster means is that basically they took the 426 Max Wedge block and adapted Hemi heads to it. Yes they had to change the block as it would not hold up at first and was craking cylinders I believe. And they went to 4 bolt mains and have the Head bolts come from underneath. But it was developed from the wedge block. Ron

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Thank you Ron, for the careful observation! That's EXACTLY what they (Chrysler engineers) did for the high output/high rpm characteristics of this motor. "Fortification" to say the LEAST. I believe the main caps were "cross-bolted" into the block at #2,#3 and #4
main caps. The 64' Stage III 426 Max-Wedge motors might have been setup the same way. They also had the conventional 2 bolt setup on all 5 caps.

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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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I shift my HEMI at 7,300 and cross the line at 7,600. Car has been 8.46 @ 161 all motor 2 small carbs at 3200 lbs.
just sayin...

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Power to weight, my friend!
Lighter weight always helps (free hp).

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604" 1178 HP all motor by DTHEMI

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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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the blocks are not the same


if the wedge block was like the hemi block (4 )cross bolt mains


and they kept the max wedge port or even bigger / diffrent head (none hemi )


maybe the wedge would have been better than it is


if you where to compare the hemi to big block chevy it would be intresting

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Let's unravel your statements here:

Block dimensions and BORE spacing is exactly the same. They are NOT built on the SAME block!!

They have THREE (3) cross-bolted main caps.

Maxie heads are fine up to 450 ci, maybe 470. 500
or more cubes, think about aftermarket and/or "fully ported" Maxies with bigger valves. Wedges have a WIDE selection of cylinder heads.

Chrysler Wedges are getting BETTER as each year passes.

Comparing a Big-Block Chevy to a HEMI? No comparision ( sorry chevy guys). HEMI can and will
rpm in places where "Rat Motors" will never go to.
Funny thing though, Ford's 427 SOHC motor could do
major strip damage to a Chevy Big Block also! 600+
horses "out-the-box"! After all, it IS a hemi (head type) motor!

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I like the fact that you are trying to compare a wedge to a hemi

two diffrent motors

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Two different motors, yes...but from the SAME
basic foundation or block dimensions.
HEMI - High rpm powerhouse.
WEDGE - Lower rpm torque monster.
Best battleground is between the 220ft and 1000ft marks (1/4 mi). A good lead margin there, you've won.

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the blocks are not the same


if the wedge block was like the hemi block (4 )cross bolt mains


and they kept the max wedge port or even bigger / diffrent head (none hemi )


maybe the wedge would have been better than it is


if you where to compare the hemi to big block chevy it would be intresting

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Let's unravel your statements here:

Block dimensions and BORE spacing is exactly the same. They are NOT built on the SAME block!!

They have THREE (3) cross-bolted main caps.

Maxie heads are fine up to 450 ci, maybe 470. 500
or more cubes, think about aftermarket and/or "fully ported" Maxies with bigger valves. Wedges have a WIDE selection of cylinder heads.

Chrysler Wedges are getting BETTER as each year passes.

Comparing a Big-Block Chevy to a HEMI? No comparision ( sorry chevy guys). HEMI can and will
rpm in places where "Rat Motors" will never go to.
Funny thing though, Ford's 427 SOHC motor could do
major strip damage to a Chevy Big Block also! 600+
horses "out-the-box"! After all, it IS a hemi (head type) motor!

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If you have ever seen a "Ball Stud" Hemi it was for all intents and purposes a knock off of the Chevrolet Big Block. The design was proven and while it didnt offer the true "maximum performance" of the 426Hemi, the big chevrolet made tons of power and was a far more uncomplicated and cheaper design. Probably the best overall high performance engine ever produced when you take everything into account...

MB

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604" 1178 HP all motor by DTHEMI

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what's that cost??? 80k? Still comes down to your wallet. Hemi is a great motor but a wedge will get it done on a budget.

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no where near that

when Darrin agreed to build mine.price was never a factor. his E85 653" made 1261 HP and 1,000 lb torque. I believe that's more HP than any others made using a 4.8 bore center.
at 604 and 1178 mine makes .01 more per cube
What I learned from discussions with Darren as he worked on mine is worth more than money can buy.

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Comparing a Big-Block Chevy to a HEMI? No comparision ( sorry chevy guys). HEMI can and will
rpm in places where "Rat Motors" will never go to.
Funny thing though, Ford's 427 SOHC motor could do
major strip damage to a Chevy Big Block also! 600+
horses "out-the-box"! After all, it IS a hemi (head type) motor!

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If you have ever seen a "Ball Stud" Hemi it was for all intents and purposes a knock off of the Chevrolet Big Block. The design was proven and while it didnt offer the true "maximum performance" of the 426Hemi, the big chevrolet made tons of power and was a far more uncomplicated and cheaper design. Probably the best overall high performance engine ever produced when you take everything into account...

MB

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BBC is a heck of an engine. Can we say that here?:o

Ball Stud Hemi,

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SURE, you can say it here! The BBC is a fine engine from the "General's Army", but it lacks the overall "ruggedness and dependability" that the HEMI has as a sheer advantage. The HEMI has "overengineered and weighty" engine/cylinder head components, it still delivers solid performance. The chamber/port combination of the HEMI head is responsible for it's "UNLIMITED" top end charge. The shaft-type rocker arms (heavy) are a bit stronger in material and keeps the rocker/valve tip alignment, while ball-stud, although lighter (a GREAT plus for rpms), may pull through the pushrod end. Still a WORTHY adversary!!

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The King says HEMI

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Whoa NOW!! The King LOVES both types of motors!! Started with Chrysler WEDGES, won BIG with the HEMI for years, went to a Ford
wedge motor (429 "tunnel-port" NASCAR motor) for a season, (in 1969 I believe), then went back
to the Dodge WEDGE (426 version) before going to GM and retiring in the early 90's.