Cadillac Owners Forum banner

1 - 20 of 27 Posts

·
Registered
Joined
·
4,860 Posts
Discussion Starter #1
A new variation of the LS2 in a 6.2L displacment is available in the next gen of SUVs coming soon this year. With a little more aggressive calibration and/or camshaft, it would make a worthy LS6 replacement for the V if we can't have the LS7. :)

Gleaned from gminsidenews.com....

6.2L aluminum block (L92) with variable valve timing, capable of 380 to 400 horsepower (283 to 298 kw)

The high-performance 6.2L L92 uses a forged steel crankshaft.

The block for the 6.2L engine features a crankcase “windows” – vents that help improve bay-to-bay breathing. This reduces pumping losses and supports the high horsepower output of the high-performance engine. A new, 58X ignition system and a more powerful, E38 ECM are integrated on all engines.

The 58X ignition system uses a unique crankshaft wheel and sensors to provide the new, 32-bit E38 ECM with more immediate information on the crankshaft’s position during rotation. In turn, this allows the controller to adjust ignition timing with greater precision, which optimizes performance and economy. Engine starting also is more consistent.

Variable valve timing (VVT) is a standard feature on 6.2L engines; it helps optimize camshaft timing to improve low-rpm torque and high-rpm horsepower. The introduction of variable valve timing through the unique dual-equal cam phaser is the industry’s first application of VVT on a mass-produced V-8 cam-in-block engine. The unique dual-equal phaser adjusts the camshaft timing at the same rate for both the intake and exhaust valves.

The system incorporates a vane-type camshaft phaser that changes the angular orientation of the camshaft, thereby adjusting the timing of the intake and exhaust valves to optimize performance and economy, and help lower emissions. It offers infinitely variable valve timing in relation to the crankshaft. The cam phaser vane is attached to the camshaft on the front journal. As driving conditions warrant, the cam phaser system can reduce ignition timing at higher rpm levels to increase power. At lower rpm levels, torque is enhanced with increased timing.

This cam phaser feature was pioneered by GM and introduced on the new 3.5L and 3.9L V-6 engines in 2005 – a first for the use of variable valve timing on a cam-in-block engine design. As driving conditions warrant, the cam phasing system can reduce ignition timing at higher rpm levels to increase power. At lower rpm levels, torque is enhanced with increased timing.

Precise camshaft timing is the key to the variable valve timing system’s capability to optimize performance. Like the 58X ignition system, cam phasing is directed by the E38 ECM. It relies on data from a camshaft position sensor – a target ring with four equally spaced segments – that communicates the camshaft’s position quicker and more accurately than previous systems that used just a single segment. Also, a leaf spring-type tensioner is used on the timing chain to ensure precise tension.

The 6.2L engine offers a significant power level increase compared with previous premium engines, with much of the newfound power coming from high-flow aluminum cylinder heads. The heads are based on the racing-derived cylinder heads of the Corvette Z06’s LS7 7.0L engine, including a unique inlet port shape and offset rocker arm design. Airflow of the heads is supported by large 55-mm-diameter intake valves and 40.4-mm-diamter exhaust valves.

“The heads use the high-performance technology of the Corvette’s LS7 to build efficient power in truck engines,” said Meagher.

All Gen IV small-block Vortec V-8 engines are designed for quieter operation, including:

* Special friction-reducing coating on piston skirts
* Full floating piston pins
* Damping patch on the oil pan (externally mounted)
* Timing chain tensioner
* Quieter alternator

Backing the new engines’ quietness is the assurance of long-lasting performance. The new Gen IV engines were validated under extreme conditions, with dynamometer testing equivalent to 150,000 miles. The Vortec 6.0L iron block heavy-duty engine was tested the equivalent of 200,000 miles.

Some of the stringent durability testing included cycling engines between the peak torque and peak horsepower rpm points – the equivalent of towing a heavy trailer up a steep grade – for 600 straight hours.

The engines also feature many long-life engine components that can reduce maintenance intervals and costs. The iridium-tip spark plugs, engine coolant, accessory drive belt and sealing gaskets are some of these items. Also, a revised water pump design (introduced on late Gen III V-8s) has improved sealing for increased durability.
 
1

·
Guest
Joined
·
0 Posts
if everyone wants a different motor so bad. christ, build one and drop it in. problem solved. that simple
 

·
Registered
Joined
·
168 Posts
Rick,
That would be a great motor for the next gen V. For now your tune has made my V a whole lot more fun in the meantime.
Frank.;)
 

·
Registered
Joined
·
2,180 Posts
I have the Mercruiser 6.2L engine, rated at 320 crankshaft hp, in my boat. Merc buys the 5.7L blocks from GM, then tossed out the crank, pistons, and rods, and replace everything with innards that increase stroke from 3.48" to 3.75 inches. They add stronger pistons to make up for the increased piston speed, and make other mods as needed. This is a recreational version of their "Black Scorpion" racing engine....and for numerous reasons (including not wanting to cannibalize sales of Merc's 8.1L big blocks), they only "need" 320 hp out of it.


It's a nice running rig, smooth at all rpms, and lots of guys run em all day long at 4000 rpm. With the exhaust cutouts open, the thing sounds it's it's got a high duration cam at idle...

I wonder how much, if any, of the design of the engine mentioned in your post is "inspired" by the mercruiser engine programs. Merc and GM have played nicely together for years regarding engine development and racing programs.

D
 

·
Registered
Joined
·
4,860 Posts
Discussion Starter #6
1MEANV said:
if everyone wants a different motor so bad. christ, build one and drop it in. problem solved. that simple
It's not that simple. If it were, one could have bought a V6 CTS, saved $10k and spent it on a new engine.

Personally, I don't want to spend $50k + on a new V again and get a LS2. With the right engine choice by GM, there will be a new V in my garage. Repowering my current V with a different engine is not in my future; I want a completely new car again.

The 6.2L, with its premium features, would be a better fit for the 2006+ V than the plebeian LS2. That simple. :duck:
 

·
Registered
Joined
·
746 Posts
StealthV said:
It's not that simple. If it were, one could have bought a V6 CTS, saved $10k and spent it on a new engine.

Personally, I don't want to spend $50k + on a new V again and get a LS2. With the right engine choice by GM, there will be a new V in my garage. Repowering my current V with a different engine is not in my future; I want a completely new car again.

The 6.2L, with its premium features, would be a better fit for the 2006+ V than the plebeian LS2. That simple. :duck:
and when you need it tunned just give us a call.:lildevil: :lildevil: j/k
 

·
Registered
Joined
·
523 Posts
stealth, shoot me an email at [email protected]
I am interested in the tune but haven't been able to get an email to you.
Tried different email addys but I always get them back saying there is no such address.
thanks
 

·
Registered
Joined
·
27 Posts
Plan to see a new 6.0L iron block and possbily a 6.2 HO option in the GMT900 (2007+ platmform GM trucks) 5.3L get pumped up along with the 4.8 and 4.3L dissapears for the new 4.2L

New stuff coming soon but trucks are first.
 

·
crushing Vs with my Wurm
Joined
·
12,266 Posts
Btl,

I concur with your findings. I supply the automotive market and their Tier 1 and 2 suppliers. I have heard that the line tooling change overs will begin in the next few months for next years offerings.

F
 

·
Registered
Joined
·
27 Posts
I work with several of the GM design groups (here in Burbank CA and in Detroit MI) with new projects and show concept vehicles. When you get to see that it takes litterally two years to ramp up for full production it really makes you think ...
 

·
Registered
Joined
·
4,860 Posts
Discussion Starter #14
alcast082 said:
stealth, shoot me an email at [email protected]
I am interested in the tune but haven't been able to get an email to you.
Tried different email addys but I always get them back saying there is no such address.
thanks
When I'm back at my desk I will. In the mean time, all the email addresses on the website are correct. http://www.stealthv.com

MooreMotorsports said:
and when you need it tunned just give us a call. j/k
No thank you. :)
 

·
Registered
Joined
·
490 Posts
the cam phaser system can reduce ignition timing at higher rpm levels to increase power.
Did anyone catch that? That is one brilliant insider.

There is something so nice about having a luxury car with such a brutish engine. Adding VVT will take away some of that mystique. Say goodbye to our rough idle.
 

·
Registered
Joined
·
438 Posts
Barak said:


Did anyone catch that? That is one brilliant insider.

There is something so nice about having a luxury car with such a brutish engine. Adding VVT will take away some of that mystique. Say goodbye to our rough idle.
Probably true, but you can't argue with the performance benefits it could bring. On the other hand, I like the performance benefits of the "simple" engine we have now.
 

·
Registered
Joined
·
219 Posts
StealthV, I agree with you wholehardedly. A new V is not in the plans for me if we don't get more muscle. The other day I was entering a parking lot to purchase some lawn stuff and a red 06 vette cot my eye. Further examination told me It was Yep ! a Z06. I went over for a closer look noticing how great they look in real life.The photos don't do them justice. The owner happen to be cleaning it up to show some clients he was meeting with. We had a brief but informative conversation. The fellow works for GM in quality control, though his personal vehicle it was a test Mule for GM. I'm getting to my point, hang in there. In conversation I rendered my dissatisfaction of GM putting the LS2 in the V, though hopping for a better future by dropping the LS7 in. That idea was fast deminished when he suggested demand would be to great to drop the LS7 in the V. The 7000 production figure for the Z06 this year was not going to be met. Add the "V" taking engines would only exaserbate the problem. Oh well ! it was a nice dream.
 

·
Registered
Joined
·
195 Posts
1MEANV said:
if everyone wants a different motor so bad. christ, build one and drop it in. problem solved. that simple
Not that simple; for the price of dropping one in and the grief don't you think most of us would consider just buying the Z06 lol.
 

·
crushing Vs with my Wurm
Joined
·
12,266 Posts
jimbo1320 said:
In conversation I rendered my dissatisfaction of GM putting the LS2 in the V, though hopping for a better future by dropping the LS7 in. That idea was fast deminished when he suggested demand would be to great to drop the LS7 in the V. The 7000 production figure for the Z06 this year was not going to be met. Add the "V" taking engines would only exaserbate the problem. Oh well ! it was a nice dream.

Jimbo,

Am I missing something here? You mention that the demand for the Z06 isnt going to be met, yet adding the LS7 to the V would only exascerbate *sic* the problem. Seems to me that if they wont make the number of Z06s as expceted, theyd have left over (actually extra capacity) motors for the V.

F
 

·
Registered
Joined
·
23,162 Posts
Florian said:
Jimbo,

Am I missing something here? You mention that the demand for the Z06 isnt going to be met, yet adding the LS7 to the V would only exascerbate *sic* the problem. Seems to me that if they wont make the number of Z06s as expceted, theyd have left over (actually extra capacity) motors for the V.

F
i read it as they can't make enough LS7s
:F

(we need a :F smilie :D)

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
 
1 - 20 of 27 Posts
Top