Turbo for the H3

Turbo for the H3

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Turbo for the H3 - 10/4/2006 10:26:56 AM

Justin

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Joined: 8/2/2006
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Thinking about the torque and drive-train as a whole. What would be slick is to have a simple 2 setting turbo's boost controller. "onroad and offroad" if you will. The reasoning would be if you are wheeling, have the boost lowered to somewhat to limit power from the turbo, you should have enough torque to do what you want naturally aspirated, but when you are pulling or daily driving around town have the turbo boost set higher. This would save the drive-train while wheeling and put the power where you need it. Any thoughts?

Justin

Post #: 1

RE: Turbo for the H3 - 10/4/2006 1:27:28 PM

Justin

Posts: 923
Joined: 8/2/2006
Status: offline

On the same note, I just found some info that GM might be considering a turbo for the H3T. Not sure of the validity of this info, but I will post as soon as I find more.

J

Post #: 2

RE: Turbo for the H3 - 10/4/2006 1:36:41 PM

Justin

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Joined: 8/2/2006
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Here is the Spy report from Motor Trend for the 2008 H3
http://www.motortrend.com/future/spied_vehicles/112_0509_2008_hummer_h3/

The Hummer team pulled off an impressive feat, as challenging as ascending the Rubicon Trail, by building the H3 off the Chevrolet Colorado platform. Despite all the initial limitations, Hummer has created a right-sized sport/ute that fully captures all the core styling and off-roading attributes that define the brand. Unfortunately, the compact truck platform did not allow for packaging a larger engine.

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In the Colorado, the inline five-cylinder engine is quite mild; in the H3, the 220-hp I-5 is its exposed Achilles heel. Engineers readily admit the on-road weakness, though they were left without other ready options. This is the engine intended for the platform, though the H3 is a few hundred pounds heavier than the pickups.

The Atlas I-6 used in the midsize GMT-360 sport/utes now produces 291 horsepower, meaning the one cylinder they chose to lop off for the I-5 was worth 71 horsepower. They chose the wrong cylinder. It's no surprise that GM Powertrain is working to create a more potent I-5, whose output will likely be around 240-245 horsepower. The engine displacement will climb to 3.7 liters from 3.5. We caught such a mule testing in Death Valley.

Hummer is also looking to offer an Alpha version with even greater horsepower. Although prototypes have been constructed with turbos, it is the feeling that off-roaders would not want the variable power characteristics created by turbo spooling. The answer is unclear right now, but we do expect an Alpha and a pickup truck variant to join the line for 2009, if not sooner.

The Hummer team pulled off an impressive feat, as challenging as ascending the Rubicon Trail, by building the H3 off the Chevrolet Colorado platform. Despite all the initial limitations, Hummer has created a right-sized sport/ute that fully captures all the core styling and off-roading attributes that define the brand. Unfortunately, the compact truck platform did not allow for packaging a larger engine.

dcmaxversion = 9
dcminversion = 6
Do
On Error Resume Next
plugin = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & dcmaxversion & "")))
If plugin = true Then Exit Do
dcmaxversion = dcmaxversion - 1
Loop While dcmaxversion >= dcminversion

In the Colorado, the inline five-cylinder engine is quite mild; in the H3, the 220-hp I-5 is its exposed Achilles heel. Engineers readily admit the on-road weakness, though they were left without other ready options. This is the engine intended for the platform, though the H3 is a few hundred pounds heavier than the pickups.

The Atlas I-6 used in the midsize GMT-360 sport/utes now produces 291 horsepower, meaning the one cylinder they chose to lop off for the I-5 was worth 71 horsepower. They chose the wrong cylinder. It's no surprise that GM Powertrain is working to create a more potent I-5, whose output will likely be around 240-245 horsepower. The engine displacement will climb to 3.7 liters from 3.5. We caught such a mule testing in Death Valley.

Hummer is also looking to offer an Alpha version with even greater horsepower. Although prototypes have been constructed with turbos, it is the feeling that off-roaders would not want the variable power characteristics created by turbo spooling. The answer is unclear right now, but we do expect an Alpha and a pickup truck variant to join the line for 2009, if not sooner.

Post #: 3