2009 Engine with Lambda Option - GMC Acadia Forum: AcadiaForum.net
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post #1 of 69 (permalink) Old 01-22-2008, 12:43 PM Thread Starter
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2009 Engine with Lambda Option

I've been obsessed with looking for what engine will be offered in a Acadia Denali (if in fact they build the darn thing) and I came across this nugget of information form www.GMInsideNews.com



Quote:
Originally Posted by minnfang
If they go DI on the Traverse, wouldn't they have to go DI with the entire Lambda lineup for 2009? If not, they'd have the cheapest Lambda with the best engine - that would be kind of backwards.

All of the 2009 Lambda vehicles will have DI on the 3.6L.

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post #2 of 69 (permalink) Old 01-22-2008, 02:29 PM
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Re: 2009 Engine with Lambda Option

Do you think problem in engine? So if Acadia get 10-15 hourses more, the problem will gone. I'm still thinking engine not a problem, neither transmission, the problem is/are in software or/and processor. I know for sure the cheaper updated software, but it's very expensive built new logical board. So, gm is trying go cheaper way.

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post #3 of 69 (permalink) Old 01-23-2008, 01:34 AM
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Re: 2009 Engine with Lambda Option

Quote:
Originally Posted by minnfang
If they go DI on the Traverse, wouldn't they have to go DI with the entire Lambda lineup for 2009? If not, they'd have the cheapest Lambda with the best engine - that would be kind of backwards.

All of the 2009 Lambda vehicles will have DI on the 3.6L.
[/quote]

Well, I must not have seen what you read, but I did see the 3.6L SIDI V6(LLT) vs. the 3.6 LY7 (current Acadia) in the top 10 engine review that you referenced. Here's the spec:

Displacement: 3564cc
Assembly Site: Flint, Michigan
Configuration: Dual Overhead Camshaft (4 valves per cylinder)
Horsepower/Application:
304 HP @ 6700 rpm (Cadillac CTS)
302 HP @ 6700 rpm (Cadillac STS)
Torque:
273 lb.-ft. @ 4000 rpm (Cadillac CTS)
272 lb.-ft. @ 4000 rpm (Cadillac STS)

Features: Variable Valve Timing, Direct-Injection

Have you read what the equivalent MGP will be on an Acadia? I'd love the extra pwr, but at what price? Is this perhaps equally efficient as the existing engines?

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post #4 of 69 (permalink) Old 01-23-2008, 07:31 AM Thread Starter
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Re: 2009 Engine with Lambda Option

From what I surmise is the mpg should be close to the same to maybe 3-5% better (that is really neglible in my opinion). I primarily want the added torque to get the Acadia moving.

I know from watching the 4.2L I6 develop over the years that they usually find ways to squeeze some more power out of the engines when needed. I think a combination of current owner feedback and GM like having the "class leading" language in there advertising should make my wishes come true.

Hopefully we will all find out towards the end of March when 2009 model year literature starts surfacing.

2008 Acadia SLT2 AWD Carbon Metallic w/ Ebony -&nbsp; sunroof, rear DVD, HID, HUD, Trailering, Rear Audio - Issues:<br />- Water pump replaced @ 37.5k<br />- Passenger DRL bulb burned out @ 42k<br />- Transmission failure/replaced @ 86k<br />- Front struts, Rear upper control arm, tranny control module @ 99k
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post #5 of 69 (permalink) Old 01-23-2008, 09:18 AM
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Re: 2009 Engine with Lambda Option

The extra little bit of grunt will help, but it won't be a shocking difference, as the current powerplant already makes great and very similar levels of power. Transmission tuning should again be slightly different, but we'll have to see how well they actually do that. Out of both GM and Ford using the 6-speed, GM still can't seem to come close to tuning it as well as Ford, and continually claims what they do is for economy, but that argument isn't working anymore.

We'll see.

Along with the DI 3.6L engine will be "new" center stacks inside incorporating the new integrated radio & climate, which essentially means components that are all one piece, sort of, and not with obviously separate black radio and climate units.
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post #6 of 69 (permalink) Old 01-23-2008, 09:32 AM
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Re: 2009 Engine with Lambda Option

Quote:
Originally Posted by caddycruiser

Along with the DI 3.6L engine will be "new" center stacks inside incorporating the new integrated radio & climate, which essentially means components that are all one piece, sort of, and not with obviously separate black radio and climate units.
If I understand this properly some would take this as a step backwards. If it is like my Outback all this means is that it will be more difficult for those who want to swap out stereos. Mind you, I am not a big customization guy, so it does not matter much to me but others have complained about the stereos in the Outback and there is not much they can do about it now because it is "integrated" in some way with the HVAC controls.

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post #7 of 69 (permalink) Old 01-24-2008, 04:19 PM
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Re: 2009 Engine with Lambda Option

Quote:
Originally Posted by caddycruiser
The extra little bit of grunt will help, but it won't be a shocking difference, as the current powerplant already makes great and very similar levels of power. Transmission tuning should again be slightly different, but we'll have to see how well they actually do that. Out of both GM and Ford using the 6-speed, GM still can't seem to come close to tuning it as well as Ford, and continually claims what they do is for economy, but that argument isn't working anymore.
Well, let's just hope it makes the Acadia even better than it already is! Here's a short blurb from a google search on the new engine:

"For 2008, STS will be the first GM vehicle equipped with a new 3.6-liter direct-injected V-6 engine. The new base powerplant, with 298 horsepower (222 kW), delivers 40 more horsepower; and torque is increased to 268 lb.-ft. (371 Nm) up from 252 lb.-ft. (348 Nm) on the current base engine.

The new direct-injected 3.6L will be mated to the Hydra-Matic 6L50 six-speed automatic transmission, the first pairing of this transmission with a V-6 engine. Additionally, the STS V-6 will continue to be available with all-wheel drive (AWD) for 2008.

Advantages of the new direct-injected engine include a 25-percent reduction in cold-start hydrocarbon emissions. Additionally, despite the 15-percent increase in power, fuel economy is expected to increase slightly."

http://www.autobloggreen.com/2007/05...n-to-3-6l-v-6/

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post #8 of 69 (permalink) Old 01-24-2008, 10:48 PM
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Re: 2009 Engine with Lambda Option

Here's a complete list of all the quotes on that GMI thread, about the Lambda changes.

First the info posted on the Canadian auto show sight:

Quote:
2009 Chevrolet Traverse
Based on GMs popular midsize crossover architecture, the Traverse delivers a robust and satisfying combination of power, efficiency, ride and safety. The driving experience is supported by a sophisticated, 3.6L DOHC V6 that features variable valve timing and gasoline direct-injection technology. It is designed to provide excellent power and efficiency that translates to usable, power-on-demand performance and is expected to deliver the best highway fuel economy in the segment.

http://www.autoshow.ca/2008/
http://www.autoshow.ca/2008/downloads/SHOWBIZ-JAN08.pdf
Seemed like a possible flub, until then a senior member of GMI said this, after one person brought up that it would be awkward for the new cheapest Lambda to have this engine and not the others:

Quote:
All of the 2009 Lambda vehicles will have DI on the 3.6L.
And then the quotes from the other poster:

Quote:
I don't think the Traverse will have any other engine option besides the 3.6L DI. At least that was the plan when I last heard.

Also, it should have a unique dash. All of the 2009 Lambda's are getting interior tweaks done to them for the addition of integrated switchgear.
and then, to clarify:

Quote:
DI adds ample amounts of power and allows the engine to be more fuel efficient. Plus it reduces cold-start carbons.

The switchgear will be the new, integrated type. The whole center stack will be changed.

Price difference will be minimal.
And more, this time in response to WHY these changes (DI engine and integrated center stack, etc. were not included from the start, in the Lambdas):

Quote:
They would have, but the DI engine and switchgear were not ready at the time.

The current portion of the center stack that is all black plastic will look different. Other than that, same as it is now.
So, good stuff. Nothing 100%, but seems dead on, and we'll know for sure in about 2 months or so when the ordering guides are put up.
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post #9 of 69 (permalink) Old 01-24-2008, 11:19 PM
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Re: 2009 Engine with Lambda Option

Quote:
Originally Posted by caddycruiser
The extra little bit of grunt will help, but it won't be a shocking difference, as the current powerplant already makes great and very similar levels of power. Transmission tuning should again be slightly different, but we'll have to see how well they actually do that. Out of both GM and Ford using the 6-speed, GM still can't seem to come close to tuning it as well as Ford, and continually claims what they do is for economy, but that argument isn't working anymore.
All of the reviews I've seen of the new CTS say the 6 spd trans is dead on. Of course, it may be easier to program the 3.6 to the CTS as opposed to this larger vehicle.

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post #10 of 69 (permalink) Old 01-25-2008, 12:37 AM
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Re: 2009 Engine with Lambda Option

Quote:
Originally Posted by Sboden
Quote:
Originally Posted by caddycruiser
The extra little bit of grunt will help, but it won't be a shocking difference, as the current powerplant already makes great and very similar levels of power. Transmission tuning should again be slightly different, but we'll have to see how well they actually do that. Out of both GM and Ford using the 6-speed, GM still can't seem to come close to tuning it as well as Ford, and continually claims what they do is for economy, but that argument isn't working anymore.
All of the reviews I've seen of the new CTS say the 6 spd trans is dead on. Of course, it may be easier to program the 3.6 to the CTS as opposed to this larger vehicle.
The transmission in the Acadia is not the same as the one in the CTS. Our transmission is actually a transaxle with half shafts to each of the front wheels. The CTS has a rear wheel drive transmission with a driveshaft coming out the back. I'm sure there are many different internal parts in each of the two transmissions. Therefore it is hard to compare them.

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