Recent Topics
They don't make 'em like they used to...
by Alex_V
Today at 06:55 PM
5W-20 P.U.P. at Walmart (yes, in stock!) $24.97
by Linctex
Today at 06:37 PM
Havoline ProDS 10w30 on Rollback at Walmart
by JohnnyJohnson
Today at 05:43 PM
Richmond Raceway
by Warstud
Today at 05:40 PM
2009 Mustang GT
by GMFan
Today at 05:22 PM
Is your A/C ready for the summer?
by Nick1994
Today at 04:51 PM
Pennzoil Synthetic Rollback Walmart
by FordBroncoVWJeta
Today at 04:48 PM
Alternators, A just in case Scenario.
by rollinpete
Today at 04:38 PM
Palm Ratchets
by 2015_PSD
Today at 04:32 PM
2013 Equinox ATF change
by Dave Sherman
Today at 04:13 PM
Champion vs NGK Spark Plugs ?? Iridium
by fins
Today at 03:46 PM
Are you driving the same car since 2010
by CourierDriver
Today at 03:45 PM
2018 Diesel F150
by BlueOvalFitter
Today at 03:09 PM
Do I really need iridium spark plugs?
by cheesepuffs
Today at 03:06 PM
Any wing lovers here?
by car51
Today at 03:03 PM
C&P Hastings LF240 @ 10,000 miles - 96 Maxima
by 92saturnsl2
Today at 03:02 PM
FULL brand oil filter UN USED CUT OPEN
by car51
Today at 02:27 PM
So how much do you pay for gas?
by rollinpete
Today at 02:10 PM
Adjusting Alternator Voltage
by George7941
Today at 01:48 PM
what if i dont know what to use
by VTAK
Today at 01:41 PM
Newest Members
Marc32275Jax, puma4440, zeroyon223, wade12345, rdatman
64806 Registered Users
Who's Online
97 registered (2002 Maxima SE, 14Accent, AandPDan, 2015_PSD, 69Torino, 8 invisible), 1433 Guests and 47 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
64806 Members
68 Forums
282086 Topics
4709635 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 4 1 2 3 4 >
Topic Options
#4701749 - 03/21/18 10:45 AM New 4.2L V8 from GM and Cadillac
MrHorspwer Offline


Registered: 12/18/06
Posts: 1409
Loc: Michigan
GM/Cadillac announced today a new 4.2L twin-turbo V8 for the CT6.

Clean-sheet design that shares nothing with any existing GM engines
Hot-V design, with the exhaust ports exiting into the valley of the engine, directly where the turbos are located
Cylinder deactivation
Hand-built and signed by the builder at the Bowling Green Corvette Plant

550 HP/627 lb. ft. for the CT6 V-Sport.

The non V-Sport version will also have the engine available, though with *only* 500 HP.

The V-Sport is also getting an insane 19" Brembo brake package.


Top
#4701759 - 03/21/18 10:54 AM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
oil_film_movies Online   content


Registered: 06/13/16
Posts: 2242
Loc: MN
The LT4 produces 650HP/650FT-LBS with supercharging.
I think Cadillac marketers want to go elite, up-scale, Cadillac-unique to sell their cars on emotion. Might work if they can get a high price.
Even though the LT4 is better. Mass may be similar too.

Top
#4701767 - 03/21/18 11:05 AM Re: New 4.2L V8 from GM and Cadillac [Re: oil_film_movies]
michaelluscher Offline


Registered: 10/07/12
Posts: 2379
Loc: Staten Island, NY
Originally Posted By: oil_film_movies
The LT4 produces 650HP/650FT-LBS with supercharging.
I think Cadillac marketers want to go elite, up-scale, Cadillac-unique to sell their cars on emotion. Might work if they can get a high price.
Even though the LT4 is better. Mass may be similar too.


This line of thinking brings back bad memories

This same line of thinking birthed the Northstar
_________________________
'06 Toyota Camry SE V6 3MZ-FE 96k
'01 Mercury Villager Estate VG33E 52k
'06 Ford Taurus SE Vulcan 60k
'13 Chrysler 300 3.6 Pentastar 202k

Top
#4701773 - 03/21/18 11:08 AM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
BAJA_05 Offline


Registered: 02/04/18
Posts: 286
Loc: Pennsylvania
Was behind a new or newer Cadillac yesterday. It had a 2.0L Turbo emblem on the back. Sorry not talking about what the OP stated though.
_________________________
2017 VW Jetta SE TSI 1.4L Turbo
PP Euro 0W40 & FU
2008 Acura TL 3.2L QSHM 5W20 & FU
2005 Subaru Baja AWD 2.5L N/A 5spd.
Rotella T6 5W30 & ST

Top
#4701787 - 03/21/18 11:19 AM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
oil_film_movies Online   content


Registered: 06/13/16
Posts: 2242
Loc: MN
"Cadillac says the new 4.2 is actually a little lighter and a little more compact than the LT4. We find this hard to believe, considering compact dimensions are among the biggest selling points of GM’s small-block. Engineers point to the shorter block (by 50 millimeters), made possible by bore spacing down to 96.0 mm from 111.7 mm in the small-block."-- Car and Driver magazine

So they saved some mass. Doesn't sound like much.
We have to think of this as appealing to the kind of rich buyer that responds to "gee-whiz, twin turbo's!!". GM might make money on this one, so I guess there's no sense in saying the LT4 is better and what idiots GM are for producing this newer design that doesn't beat an LT4.
Maybe this beats an LT4 for NVH. That would be a justification for it I guess. The LT4 is pretty good there now, so I dunno if this a leap forward.

Top
#4701788 - 03/21/18 11:20 AM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 11840
Loc: N.H, U.S.A.
Sounds like a mid engine vette is near.
That is not a Caddy only engine unless GM corporate is moronic.
Oh, maybe they are moronic!
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

Top
#4701847 - 03/21/18 11:53 AM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
BrocLuno Offline


Registered: 09/06/15
Posts: 5212
Loc: Kalifornia Kollective
Sorry - Barra is not moronic. She may be able to lead them to better profitability.

I'm sure the Caddy buyers have been polled (no pun intended). Branding needs an edge smile


Edited by BrocLuno (03/21/18 11:54 AM)
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

Top
#4701875 - 03/21/18 12:11 PM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
oil_film_movies Online   content


Registered: 06/13/16
Posts: 2242
Loc: MN
Luxury-performance-high$$$ cars need to have 4-valve cylinders and twin turbos. Its a selling point.
Never mind that the LT4 performs better. Doesn't matter except to engineers like me who like the best, optimal way to achieve performance.

BMW, Mercedes, Lexus, Infiniti, Jaguar, Alfa Romeo, Audi are the competitors, and all their engines are more complicated than a million Swiss watches.
It gives the owner bragging rights and an inflated sense of self-worth the more complex a machine they can own.

Top
#4701915 - 03/21/18 12:44 PM Re: New 4.2L V8 from GM and Cadillac [Re: MrHorspwer]
SubieRubyRoo Online   content


Registered: 05/14/12
Posts: 847
Loc: Winchester, Indiana
I'd take two of today's available turbos over any supercharger. You simply can't match the power and torque available from twin turbos with a streetable supercharger.

Just look at all the German cars... 4.0L TT making well over 600HP, 0-60 in the low 3s, and 25+ mpg on the highway. If I could sell some of my offspring, the M5 would be the next thing in my driveway.

Top
#4701917 - 03/21/18 12:45 PM Re: New 4.2L V8 from GM and Cadillac [Re: ARCOgraphite]
4WD Offline


Registered: 09/21/10
Posts: 5984
Loc: Texas/International
Who was it on the soap box wrt DOHC engines (multi valve)
_________________________
2017 Tahoe 5.3L 4WD
2014 Fusion Hybrid
2013 Cruze RS 1.4T
2010 Canyon 5.3L 4WD

Top
#4701960 - 03/21/18 01:24 PM Re: New 4.2L V8 from GM and Cadillac [Re: michaelluscher]
nthach Offline


Registered: 01/02/04
Posts: 3665
Loc: California
Originally Posted By: michaelluscher


This same line of thinking birthed the Northstar

This time around, GM is run by an engineer(Mary Barra) and not the train wrecks before the government takeover. I think GM did learn quite a bit from the Northstar and applied what/what not to do for this motor.

The hot-V design is probably a first outside of diesel V8s - GM probably made that move to maximize thermodynamic efficiencies with the turbocharger setup. If the engine is DOHC and headed into the Corvette or another GM product, having a smaller space claim helps as well.

Top
#4702045 - 03/21/18 02:48 PM Re: New 4.2L V8 from GM and Cadillac [Re: nthach]
LEADED Offline


Registered: 07/13/11
Posts: 89
Loc: MICHIGAN USA
Is this Powerplant DOD ? . Will see if anyone have info . Thanks

Top
#4702057 - 03/21/18 02:57 PM Re: New 4.2L V8 from GM and Cadillac [Re: LEADED]
SubieRubyRoo Online   content


Registered: 05/14/12
Posts: 847
Loc: Winchester, Indiana
Originally Posted By: LEADED
Is this Powerplant DOD ? . Will see if anyone have info . Thanks


The engine also will be General Motors’ first to apply Active Fuel Management cylinder shutoff to an overhead cam engine. Preliminary numbers are 550 hp @ 5,700 rpm in high-output form, and 500 hp @ 5,000 to 5,200 in “standard” form.

Top
#4702068 - 03/21/18 03:05 PM Re: New 4.2L V8 from GM and Cadillac [Re: ARCOgraphite]
CT8 Offline


Registered: 10/09/14
Posts: 10542
Loc: Idaho
Originally Posted By: ARCOgraphite
Sounds like a mid engine vette is near.
That is not a Caddy only engine unless GM corporate is moronic.
Oh, maybe they are moronic!

The mid engine Vette has been near since the the early 1960's
_________________________
Artificial intelligence is no match for natural stupidity, we shall prevail

Top
#4702078 - 03/21/18 03:13 PM Re: New 4.2L V8 from GM and Cadillac [Re: CT8]
4WD Offline


Registered: 09/21/10
Posts: 5984
Loc: Texas/International
Got pretty good distribution with the transaxle and torque tube … pushrod engines have a low CG … they did good adding a huffer & puffer (and blow your doors off)
_________________________
2017 Tahoe 5.3L 4WD
2014 Fusion Hybrid
2013 Cruze RS 1.4T
2010 Canyon 5.3L 4WD

Top
Page 1 of 4 1 2 3 4 >