Mopar to release 4.7 liter straight 6 crate engine

jetsetter

Forum Addict
Joined
Dec 11, 2005
Messages
7,257
Location
Seren?sima Rep?blica de California
Car(s)
1997 BMW 528i
Mopar will get racing and off-road enthusiasts buzzing with its enhanced
lineup of engines and components, which includes the industry's first aluminum
HEMI? engine blocks. Mopar will offer three aluminum versions based on the
popular 6.1-liter block, all of which are up to 98 pounds lighter than the
cast-iron production version found in the company's SRT8 products.

The first all-aluminum option is a 6.1-liter HEMI block--a direct replacement
for the factory production cast-iron 6.1-liter HEMI engine block. The second
option is prepped for a 426 cubic-inch (~6.9-liter) engine and the third
option is an engine-builder's special or "X Block," which has rough-machined
bores that allow for up to 468 cubic inches (~7.6-liter).

Beyond the new aluminum HEMI engine blocks, Mopar will continue to support the
traditional enthusiast with a broad range of HEMI crate engines including the
6.1-liter V-8, 5.7-liter V-8, 426 cubic-inch V-8, 472 cubic-inch V-8, 528
cubic-inch V-8, plus a new 572 cubic-inch V-8. With 650 horsepower and a
monstrous 660 lb.-ft. of torque, the 572 cubic-inch HEMI is the centerpiece of
Mopar's crate engine program. It continues the heritage of the 1960s HEMI
engines made popular in vehicles including the Plymouth Barracuda "HEMI
'Cuda", Plymouth Satellite and Dodge Charger.

Mopar will also introduce a new 4.7-liter I-6 Stroker long block, a powerful
upgrade for the 4.0-liter I-6 made famous in Jeep vehicles built from
1991-2006. Because off-road enthusiasts appreciated the dependability and
performance of the previous 4.0-liter engine, Mopar developed a more powerful
engine that delivers an expected 265 hp and 290 lb.-ft of torque. The engine
will fit in any Jeep vehicle previously equipped with the 4.0-liter I-6
engine.

http://www.reuters.com/article/pressRelease/idUS171874+29-Oct-2009+PRN20091029

For those who do not know the 4.0.

The original Jeep 4.0L inline-six was hewn from a solid block of granite by lightning bolts. Its cylinders were bored by the Imperial Winds and its rotating assembly was balanced by the Scales of Justice. The Ancient Egyptians used Jeep 4.0L engines to move the blocks which built the Pyramids, only switching to slave labor when it was found to be cheaper than the olive oil used to fuel the engines. Scientists have ranked the Jeep 4.0L engine as one of the strongest forces of nature, racking right up there with tectonic plate shifts for its low-end torque, and being surpassed by hurricanes only for its comparatively low redline. Mechanics have found imprints of fossilized dinosaur bones in block castings, and serial numbers in Roman numerals are a common sight. The design of the 4.0L's fuel injection system has been traced to the archives of Leonardo DaVinci, and early manuscripts of Shakespeare plays have been used as head gaskets for this engine (which, incidentally, explains the gaps in Shakespeare's collected works as well as the 4.0L's tendancy to leak oil). The engine's ancient roots also explain its ability to run on some very non-conventional fuels (original translations of the Rosetta Stone include evidence of Jeep 4.0L engines running on ox blood) as well as lubrications (during the Middle Ages, Jeep 4.0L crankcases were often filled with barley, with no detrimental effect on power output). Historians maintain that the fall of the Roman Empire hinged on their inability to design a superior engine, and had the Titanic been powered by a 4.0L Jeep engine, 1912 might have been a much happier year. Yes, had early-20th-century naval engineers had a touch more foresight, the Jeep 4.0L may have saved mankind from ever having to endure Leonardo DiCaprio and Celene Dion in the same sitting.
The only weakness in this otherwise unstoppable force of nature? Emissions. Yes, the engine's design may have come from the hand of Zeus, and its exhaust note at full throttle may have reverberated along the rock formations of Arizona to forge the Grand Canyon, but by the year 2007 its crude emissions control (originally consisting of papyrus strips soaked in the tears of the young Tutankhaman) had become outmoded, and the legendary, nay Biblical force of the Jeep 4.0L was put to rest.
 

Aaybad1

Active Member
Joined
Apr 18, 2008
Messages
177
Location
Brown Deer, Wisconsin
Car(s)
2006 Ford Ranger, 1973 IH 1310 Pickup
That sounds... epic actually. I wonder if it'll fit in the new Wranglers.
 

Jay

the fool on the hill
Joined
Dec 11, 2005
Messages
11,280
Location
Aurora, IL
Very cool. If only Ford had done anything performance wise with their 300 straight 6...that was an excellent engine.
 

argatoga

Can't Start His Wank
Joined
Oct 4, 2005
Messages
18,201
Location
Seattle
Car(s)
'13 Moto Guzzi V7, '08 Pontiac Solstice GXP
I hope this new straight six enters their line-up.

Very cool. If only Ford had done anything performance wise with their 300 straight 6...that was an excellent engine.

Well Ford does have their Oz i6. And they did con the Australian government to bring it up to code emissions wise ...
 

Rokovak

Well-Known Member
Joined
Mar 16, 2008
Messages
775
Location
NOVA
Car(s)
2016 Cadillac ATS
Gotta love Jeep's trusty 4.0L sixer. Four cylinder power with eight cylinder fuel economy, all in a bullet-proof package that you just can't kill. Now Jeep gives us six cylinder power with eight cylinder economy. Oh yea, we're almost there now!
 

JipJopJones

Well-Known Member
Joined
Aug 17, 2006
Messages
4,479
Location
North Shore
Car(s)
1979 Cressida Wagon, 1981 Corolla Hardtop
Please enlighten me as to a four cylinder automobile engine with 200ft-lbs of torque at what is essencially idle...
 

tigger

Forum Addict
Joined
Dec 11, 2006
Messages
5,737
Car(s)
'88 Vic Wagon, '92 Honda VFR
What they don't say is that the 4.7l I6 makes 290lb.ft. of torque from cranking speed to redline ... which is probably a tick over 3000rpm. :p I'm glad to see them supporting the 4.0.
 

Rokovak

Well-Known Member
Joined
Mar 16, 2008
Messages
775
Location
NOVA
Car(s)
2016 Cadillac ATS
Please enlighten me as to a four cylinder automobile engine with 200ft-lbs of torque at what is essencially idle...
I'm pretty sure there are none, but that's a moot point anyway because I was being facetious. I used to own a Grand Cherokee with the sixer and I fugging loved that engine. It wasn't much of a highway cruiser but it had plenty of grunt for mudding, and it continued to run like a champ even though I was horrible with maintaining it.
 

BerserkerCatSplat

Hormone Induced
Joined
Jun 21, 2005
Messages
9,655
Location
Alberta, Canada
Car(s)
The Jeep of Theseus, Angry Wagon
The fact it could haul around a lump like the Grand is a real testament to how solid that motor was. Long live the 4.0!

Heck, both the 4.0 and 5.2 are stone-age designs, but damn near bulletproof.
 

WDWBen

Subaru Killer
Joined
Nov 5, 2007
Messages
1,395
Location
Disney World
Car(s)
2012 MX-5 PRHT
My Dad's (and then sister's) 2000 Grand Cherokee had the 4.0L straight six. That was a great engine. Not the most powerful, but it did its job just fine lugging around the truck.

If I had gotten that truck instead of passing it to my sister (it was a "cooler" car than the 1990 Buick), I'd be saving up to drop a 4.7 in it!
 

Crazyjeeper

NickGyver
DONOR
Joined
Nov 29, 2006
Messages
7,984
Location
Dallas, TX
Car(s)
F150, CJ7, Mustang GT, Tenere, Griso
Long live the AMC straight 6.

When my 4.0L eventually packs ups, I will definitely put a stroker in there. Then again, I probably have another half a million miles before it does.

Also, find me another engine, which I can run at idle in overdrive. There is so much torque at idle, I can shift 1-2-3-4-5 without touching the gas.
 
Last edited:

Karn Evil

Active Member
Joined
Sep 28, 2009
Messages
155
Location
Pennsylvania
Car(s)
2009 Ford Ranger XLT 4x4
Makes me miss my old F150 with the 300 straight six.

I've always liked the AMC straight six, my friend had a Cherokee with one, drove the wheels off and the engine always held up. I hope this rumor is true, the world need more torquey straight six engines.
 

Blind_Io

"Be The Match" Registered
DONOR
Joined
Apr 5, 2006
Messages
22,864
Location
Utah, Banana Republic
Car(s)
06 XTerra, '00 VFR800, '07 ST1300, '11 Multistrada
The return of the I6! Wooooooooooooooooo!

I guess someone at Chrysler got on the Interwebz and found a car forum.
 

Reckoning

Well-Known Member
Joined
Jun 25, 2009
Messages
1,453
Oh god yes. Finally something done right.


I hope this new straight six enters their line-up.



Well Ford does have their Oz i6. And they did con the Australian government to bring it up to code emissions wise ...

:mrgreen: it's a good motor, any incarnation of our 4.0 :mrgreen:
 

Blind_Io

"Be The Match" Registered
DONOR
Joined
Apr 5, 2006
Messages
22,864
Location
Utah, Banana Republic
Car(s)
06 XTerra, '00 VFR800, '07 ST1300, '11 Multistrada
I was thinking about this today. I really want Chrysler to do well; maybe it's an American thing to root for the underdog. Chrysler has been kicked around a lot thanks to Daimler (who needs to STFU about running Chrysler, by the way). I really want to be able to look back on this in 10 years and be able to say that this moment was the turning point for Chrysler, that when they announced these new engines and the return of the I6 that I just knew they would be ok.

GM can go fuck a goat for all I care. They got themselves into this mess and continue to find ways to dig the hole deeper and deeper. Chrysler at least has an excuse - if it weren't for Daimler's corporate raid Chrysler would have better quality, a cash reserve and a larger market share.
 

Night_Hawk

Well-Known Member
Joined
Oct 5, 2006
Messages
1,514
Location
Gander Newfoundland
Car(s)
1996 Corolla 1.8 - 1996 Acura 3.5 RL
hmm, aluminum 6.1 sounds good too.

I must also vouch for the 4.0L, I was driving my dad's wrangler today and I found it awesome that I could accellerate no problem in 5th gear from 60kph onwards. turning over less than 1000rpm until about 85kph


might seem random but it reminds me of how much I want to drive a new Corvette...
 

VR6

Well-Known Member
Joined
Aug 8, 2006
Messages
649
Location
Calgary Alberta Canada
Car(s)
04 Sentra Spec-V
So I can buy an old cherokee for like a grand drop in this dream engine and a new tranny for what I hope would be under 7-8k and have about the coolest suv in the world!?

Awesome
 

Arctor

Well-Known Member
Joined
Jun 29, 2008
Messages
707
Location
NC
Car(s)
97 MX-5 M, 90 928GT, 89 635CSi
I feel obligated to buy a Wrangler now and drop this motor in there.
 
Top