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News: Acadia Sales Numbers:    Sept: 5,287      YTD Total: 62,013      All Time: 323,333  (graph)
   
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Author Topic: 2009 Engine with Lambda Option  (Read 25037 times, 68 Replies)
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Smooth
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« Reply #60 on: February 12, 2008, 10:29:42 PM »

This is what the GM press release has said for the specs of the Traverse engine.

Quote
Horsepower (hp):
281 @ 6400 (single exhaust)*
286 @ 6400 (dual exhaust)*

Torque (lb-ft):
253 @ 5500 (single exhaust)*
255 @ 5500 (dual exhaust)*

* Preliminary, pending SAE certification.

Source:  http://media.gm.com/us/gm/en/news/events/autoshows/08chicago/brands/chevrolet080206/index.html

So it looks like it does make peak torque at a much higher rpm than the current 07/08 Lambda engine.  Of course, it still doesn't show what the torque curve looks like between 1000-3000 rpm where the current tranny programming really likes to keep it.  But as we've mentioned, I think fuel efficiency is the real goal of implementing this engine into the Lambda platform.  It'll be interesting to see how much the EPA estimates go up...

p.s. Thanks to admin for posting the Traverse specs on TraverseForum


Kloogee,  by "go up" you do mean improvement, right?  As mentioned before in this post, it's likely that "90% of peak torque" will still be avail. at a much lower rpm than the 5500 max torque.  I don't think most drivers will see 5500 rpm all that often, but a bit more grunt in the 2000-3000 range will be nice.
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« Reply #61 on: February 13, 2008, 09:05:17 AM »

Smooth,
Yes, I fully expect there will be an improvement in the EPA estimated MPG numbers for the 09s with the DI engine.  I'm just curious to see how much it might be.

You are correct that unless you are really sticking your foot into, most people will rarely ever see 5500 rpms.  However, I'm still a bit skeptical that we'll really see any more grunt in the 2000-3000 range.  As GerryL had mentioned from an article about the 2007 Acadia engine, "The real deal here though is the flat torque curve: 90 per cent of that peak torque value is on tap from 1600 to 5800 r.p.m."  For the sake of people who get an 09, I hope you are correct.  Smiley

I also found that quote from this article:  http://www.wheels.ca/article/2812

However, as has been mentioned multiple times, we are all just having fun speculating at this point until GM finalizes their numbers and publishes hp/torque curves like have been posted for the current engine.
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2008 Acadia SLE AWD w/ tow package, 7-passenger, 6-disc Bose/tri-zone climate, remote start/backup sensors, power seats, Liquid Silver, Ebony Cloth (Nov 2007 build date)
Smooth
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« Reply #62 on: February 14, 2008, 10:53:23 PM »

Yes - that's half of the fun... speculating wink  I will be thrilled when I finally buy one of these.  I've been happily driving my S-10 Blazer since 1987.  Just sitting in the 08's gets me going.  I've got my eyes on an '09 SLT-2.  I'll be upgrading from 125 hp to around 280 hp.  Now that's gonna be nice.
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'09 SLT-2, Nav, HID, Bench, Tow Pkg, Tech Pkg., Wht. Diamond Tri., Lt. Titanium, 18" Whls. (chromed) built 9/15/08, deliv. 9/25/08, obtained 10/20/08.  1987 S-10 Blazer 2X4.  IXOYE
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« Reply #63 on: February 20, 2008, 09:23:22 PM »

1987 Wow! thumbs up

How's the s-10 been (reliability) ?
Any major issues?
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« Reply #64 on: February 21, 2008, 01:28:05 AM »

Copper..13,

The reliability has been average - and perhaps typical for this generation of GM.  The good news / bad news was that my S-10 came with a 60 month 60K mile warranty from the factory (no extra cost).  And, at 5.5 yrs & 53K miles I blew an intake manifold gasket and had a milkshake in my air cleaner  Angry  So, there was a $100 deductible to have my car towed to the dealer & I received a new short-block at no add'l. cost.  So my 193,000 miles on the chasis & tranny are more than the equiv. 140,000  miles on the replacement engine.  In 21+ yrs. I've replaced an air condit. compressor (ouch), two fuel pumps (ouch!), pwr. steering bracket, a radiator & water pump, headliner, and a variety of lessor items that fail with age.  Overall, I still like the SUV.  But, I will be "launching" into the future coming from a very old-tech S-10 to a 2009 Acadia  Cheers  I was at a Lowe's the other month and a stranger walks up while I'm on my cell phone outside my S-10 and says "Hey, do you want to sell your car"?  I've had that happen several times in the past 10 yrs. That'd be OK, except that I don't own my replacement yet!

Smooth <><
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'09 SLT-2, Nav, HID, Bench, Tow Pkg, Tech Pkg., Wht. Diamond Tri., Lt. Titanium, 18" Whls. (chromed) built 9/15/08, deliv. 9/25/08, obtained 10/20/08.  1987 S-10 Blazer 2X4.  IXOYE
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« Reply #65 on: April 08, 2008, 02:28:10 PM »

Will horsepower be the only noticeable difference with the 09 engine? Did they resolve all of the transmission issues on the 08 model?
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« Reply #66 on: April 08, 2008, 02:48:45 PM »

horsepower is only an increase of 8 or so.  The big news is the increase in efficiency.  They are talking about 25mpg on AWD (vs. 22 with non-DI engine).  That would be nice.

regular gas around me is $3.22/gallon and rising every other day....(wait until Memorial Day weekend!....).
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2008 Acadia SLT2 AWD Carbon Metallic w/ Ebony -  sunroof, rear DVD, HID, HUD, Trailering, Rear Audio - Issues:
- Water pump replaced @ 37.5k
- Passenger DRL bulb burned out @ 42k
- Transmission failure/replaced @ 86k
- Front struts, Rear upper control arm, tranny control module @ 99k
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« Reply #67 on: June 09, 2008, 05:49:43 PM »

Hope this wasn't reported elsewhere.  I was at the dealer today and the ordering software said 288HP and 270 ft/lbs for the LLT.  This should make some difference in the way it drives.  I didn't notice any MPG on the window sticker when it was printed.  Maybe they haven't had it rated yet. 
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« Reply #68 on: June 09, 2008, 06:04:30 PM »

Hope this wasn't reported elsewhere.  I was at the dealer today and the ordering software said 288HP and 270 ft/lbs for the LLT.  This should make some difference in the way it drives.  I didn't notice any MPG on the window sticker when it was printed.  Maybe they haven't had it rated yet. 

That's correct. As of late today the EPA still hadn't rated any of the FWD or AWD versions of the 2009 Lambdas. Makes you wonder how long it will be before new-year production actually begins.
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