That's a big engine....(creamy Hemi goodness within)

JRS · 9 Dec 2006 at 14:39

The car:

'65 Dodge Coronet.

The motor:

The spec:

Dale Reed built Hemi.
Brand new Hemi block.
Keith Black stroker crank, Ross custom pistons, 562ci capacity.
Stage V aluminium heads.
Cross Ram manifold.
Dual 780CFM Holleys.

Plus all the usual refinements for a hugely powerful Hemi.

The power:

677 horsies @ 6200rpm, 670 ft-lbs @ 4700rpm. Dyno'd at Dick Landry Industries, on pump gas (92PON, so 95-96RON I think).

Up for sale, for 50 dollars shy of $100k. One last shot, as I just love the plate on it:

<3

brakeinup · 9 Dec 2006 at 20:42

That looks amazing!

Acolyte · 9 Dec 2006 at 20:45

That engine bay looks stunning, like a giant orange powering that car :cool:

Stellios · 9 Dec 2006 at 20:46

Gorgeous

brakeinup · 9 Dec 2006 at 20:47

I wonder what it sounds like?

Joe T · 9 Dec 2006 at 20:54

562CI is not to be sneezed at!

silversurfer · 9 Dec 2006 at 21:45

The engine bay looks better then the car. I bet its only got 3 gears too which must be.. fun

Is that power made at the fly wheel, 526ci is 8.6 litres right ? :eek:

JRS · 9 Dec 2006 at 21:58

silversurfer said:
Is that power made at the fly wheel, 526ci is 8.6 litres right ?

562

And that's 9.2L.

I'm pretty sure that it's power at the flywheel. It would probably be a bit more powerful if they hadn't taken the compression ratio down in order for it to run happily on 92PON fuel....

brakeinup said:
I wonder what it sounds like?

Probably like a slightly less wild version of the car in this video. The Belvedere in that vid has a 426ci Race Hemi (higher compression than the road car engine, few more go-faster bits inside).

Stonedofmoo · 9 Dec 2006 at 22:13

So it's 73bhp per litre. Way to go Yank engine!

I'm not a fan, it's just crude engineering.

However I do like the rolling road readout they get over there. A lot more information than we get on ours!

Clarkey · 9 Dec 2006 at 22:19

pretty rubbish yeah, highly tuned and 73bhp/litre is laughable

JRS · 9 Dec 2006 at 22:40

Stonedofmoo said:
So it's 73bhp per litre. Way to go Yank engine!
I'm not a fan, it's just crude engineering.

Let me guess, you'd prefer something much smaller being force-fed by a pair of turbos that sounds like a hairdryer right?

Stonedofmoo said:
However I do like the rolling road readout they get over there. A lot more information than we get on ours!

Yeah, I quite like that readout.

Clarkey said:
pretty rubbish yeah, highly tuned and 73bhp/litre is laughable

That engine is hardly what I'd call 'highly tuned'.....if it was, it'd still be running 11.5:1 compression like it used to and wouldn't be running on standard octane petrol.

JRS · 9 Dec 2006 at 22:57

Tell ya what, for those of you that find all this large pushrod V8 stuff a bit too basic, I'll post about a large OHC V8.

Ford 427 Cammer anyone?

Based on Ford's FE series block, with SOHC cylinder heads and hemi-shaped combustion chambers. Back when they were first built in '65, for insurance purposes they under-rated them somewhat at 615hp @ 7000rpm with a single 4bbl carb, 657 hp @ 7500rpm with a pair of 4bbl carbs - I know of at least one that made nearly 680 horsies as standard, and was heading for the not-so-shy side of 800 with a few choice modifications....It was designed for NASCAR, but they took one look at it and promptly banned it. They were sold over the parts counter rather than actually in any cars, and those that Ford did sell usually did the buyer proud in drag racing!

Chrysler apparently built a DOHC Hemi as a testbed. The effort was abandoned since NASCAR was getting jumpy about all this exotic kit, and the reliability problems brought on by all this complication were outweighing the benefits.

Guigsy · 9 Dec 2006 at 23:05

You guys know that 'Hemi' combustion chambers aren't used anymore because it's an inefficient cludge to get two big valves in, right?

JRS · 9 Dec 2006 at 23:14

Guigsy said:
You guys know that 'Hemi' combustion chambers aren't used anymore because it's an inefficient cludge to get two big valves in, right?

The Hemi head design is actually pretty efficient. The valves are in-line rather than side-by-side, so air flows through the head better. Mopar Hemis also had the spark plug in the very centre of the chamber for better ignition. The head design gives you much less thermal energy loss as it's surface area to volume ratio is good.

***edit***

Though of course, pent-roof heads with 4 valves per cylinder would be more efficient

Guigsy · 9 Dec 2006 at 23:31

JRS said:
Though of course, pent-roof heads with 4 valves per cylinder would be more efficient

Bingo.

If you want greater efficiency, you cram in more valves. Unfortunately that means the valves poke out of the cylinder head at odd angles, so you need DOHC (dual overhead cams) to get to them. Before DOHC (e.g. the 16v engine) was born, Hemi was the best. We've moved on quite a bit since then. Are there many engines left that don't use DOHC?

Lashout_UK · 10 Dec 2006 at 00:10

Not sure how much SOHC stuff is still floating about - probably some cheaper, smaller Japanese/Korean cars are. A lot of Honda cars were SOHC 16 valvers too. As was a certain Triumph, back in 1973

RE valve count and head design....It depends how clever you are!

Chevrolet ploughed a lot of development time and money into looking at valvetrains and more importantly the number of valves.....and came to the conclusion that 16, driven by pushrods off one cam was perfectly sufficient, thankyouverymuch, and this development applied to the new LS7 engine. The result - 505 horsepower / 475 lb.-ft. torque, revving to 7000RPM (and tested to 8000), from a naturally aspirated 7 litre small block.

Whilst this may not be the pinnacle of engineering, it does indeed show there's plenty of potential from a well thought-out 2 valve per cylinder layout, with the benifit of reduced valvetrain mass.

Mickey_D · 10 Dec 2006 at 01:32

Heh, it's not about the numbers necessarily. The Hemi engine is a 50 year old design. What's pictured above is a renewal of a museum piece.

And the FACT that it will be still developing that 73bhp per litre after 200,000+ miles after being subjected to -40* winters and 50*C summers without anything more than a minor tuneup. No rebuilds, no reconditioning. And when you consider that the exact block pictured was probably first used before many of your parents were born, it's pretty amazing really.

Stonedofmoo · 10 Dec 2006 at 07:46

The spec:

Brand new Hemi block.

rayb74 · 10 Dec 2006 at 08:15

Oh dear the global temperature just went up a few degrees! :eek:

JRS · 10 Dec 2006 at 10:16

Mickey_D said:
Heh, it's not about the numbers necessarily. The Hemi engine is a 50 year old design. What's pictured above is a renewal of a museum piece.

And the FACT that it will be still developing that 73bhp per litre after 200,000+ miles after being subjected to -40* winters and 50*C summers without anything more than a minor tuneup. No rebuilds, no reconditioning. And when you consider that the exact block pictured was probably first used before many of your parents were born, it's pretty amazing really.

Although the one in that Coronet is a new Mopar crate block that's been played with, you are right - there are a number of original Hemis roaring around that have seen an awful lot of action. If they drive that one far enough, then I'm sure it'd last a loooooooooooong while before needing any work done.

That's one of the advantages of size and simplicity - helluva lot easier to maintain in good working order!