What should the 2007 Silverado have?

[Jaguar D-Type]

It needs...

The Vortec 4200 I-6:

4.2 DOHC I-6 has 275 hp at 6,000 rpm and 275 lb-ft of torque at 3,600 rpm.







The Vortec 4200 I-6 has been one of Ward's ten best engines since 2002.

see link

4.2 liter I-6

from chevyhiperformance.com

"To increase casting accuracy and minimize engine weight, the aluminum block and cylinder head of the Vortec 4200 I6 are made using a “lost foam” process. This casting technology provides both improved control of the manufacturing process and allows direct-mounted accessories that reduce vibration and weight. With the exception of the power-steering pump bracket, all engine accessories bolt directly to the engine."



"One of the most interesting aspects of the Vortec 4200 I6 is what’s called variable-valve exhaust timing. This feature adjusts the exhaust camshaft timing within a range of 25 degrees as engine operating conditions change. To do that, an onboard computer first collects several points of data including throttle position, engine load, and vehicle speed. From there, a control valve adds or removes oil from a cavity and piston chamber (see cutaway photo) at the front of the camshaft. Thus, advancing or retarding the exhaust camshaft not only enhances the torque curve, but also improves idle quality and reduces emissions. With the ability to change timing, a more aggressive camshaft profile can also be used."



I read in the November, 2004 issue of Car & Driver that the L92 is a future engine for GM's big 2007 trucks and SUVs. It will have "a bit less power" than the 6.2 liter L92 that was shown in a 2004 Chevrolet Colorado. That Chevy had 420 hp and 420 lb-ft of torque.

I think it needs a nicer interior, a fully-boxed frame, and a 6 speed automatic transmission (the 2006 Cadillac STS-V has a new 6 speed automatic).

What do you think?

[airtight_python]

The inline 6s torque curves would suck in a truck. I think they need to do something like the new 7 litre vette engines.

[Jaguar D-Type]

How does its torque curve compare with the 4.3 liter V-6?

GM's big 2007 trucks and SUVs will have a powerful new L92 V-8.

[BlenderWizard]

I think they definitely need to start putting the I-6 in the Colorado. That was one of a couple of things that kept me out of one of those

[BlenderWizard]

As far as a nicer interior goes, I disagree. I think the interior is nice enough for what the Chevy is. If you want a nicer interior get a Denali or a Caddy.

[airtight_python]

I agree about the interior. I like them the way they are.. not too futuristic or cartoonish... just right, and you can get everything you need in it anyway.

Jaquar, the torque curves in the V6s aren't shit either buddy.. I own one. I like the idea of larger V8s in trucks. Really, fuel mileage in my 6 is worse than a lot of people with ext. cab V8s. If you need fuel mileage get a car. I'd pretty much say when it comes to the low rpm, high torque numbers that a truck should have, there's really no replacement for displacment.

[White Lightening]

Greetings Jaguar,

Me - I'd think the 2007 should have the LQ9 (6 liter high output engine) with the Z60 suspension and add 5 speed automatic transmission beefed up so Chevy could drop about 25% of the Torque management. Utilize a 3.73 axle ratio.

This combination should give a full size truck with about 24mpg hwy/19 city for a RWD model and about 21 or 22 mpg hwy/17 city for a 4 x 4. It would also provide both a smooth transitional ride and still offer good handling and performance.

then have a Diesel version of the above - and a optional 6 cylinder version of above (like your 4.2) - and drop the 4.8 and 5.3 versions entirely. Nothing wrong with the 4.8 and 5.3 - but the 1500 series has just too many models/engines. No wonder GM struggles with costs. I don't know what the 4.8 opr 5.3 offer that the 6.0 LQ9 doesn't already have?

Then the 2500 series could have the same LQ4 6 liter and a Diesel choice - again - 5 speed automatic transmission but a slightly more modified Torque Management version for the 2500 and above.

White Lightening

[BlenderWizard]

Originally Posted by White Lightening

Greetings Jaguar,

Me - I'd think the 2007 should have the LQ9 (6 liter high output engine) with the Z60 suspension and add 5 speed automatic transmission beefed up so Chevy could drop about 25% of the Torque management. Utilize a 3.73 axle ratio.

This combination should give a full size truck with about 24mpg hwy/19 city for a RWD model and about 21 or 22 mpg hwy/17 city for a 4 x 4. It would also provide both a smooth transitional ride and still offer good handling and performance.

then have a Diesel version of the above - and a optional 6 cylinder version of above (like your 4.2) - and drop the 4.8 and 5.3 versions entirely. Nothing wrong with the 4.8 and 5.3 - but the 1500 series has just too many models/engines. No wonder GM struggles with costs. I don't know what the 4.8 opr 5.3 offer that the 6.0 LQ9 doesn't already have?

Then the 2500 series could have the same LQ4 6 liter and a Diesel choice - again - 5 speed automatic transmission but a slightly more modified Torque Management version for the 2500 and above.

White Lightening

I disagree about dropping the smaller v8's - GM has always offered a decent engine selection in their trucks. The do need to offer a diesel in the 1500, though.

[Silverado Brethern]

I would have to say that the 4.8L is a waste to even make and the 4.3L just doesnt have it, and I wouldnt like having a full size truck with a V6. That 4.2L engine would be a great fit for a colorado. Smaller engines in get terrible gas mileage in a fullsize truck, along with not lasting nearly as long. I like the LQ9 but as of now that's really the only solid engine GM offers(no offense but the 5.3 just doesnt have the power) and as usaull i say bring back the 350 to replace a 4.8 or 5.3 because the pontentail hp and tuning is so much higher.

Jaguar- what is the L92?

[mjgjr72]

the ls2 would be nice, a radix and good tune and you could have a nice reliable 600 hp

[Moose is loose]

I get 17-18 Hwy in my 4.8L with 315's. Not too bad IMO.

[White Lightening]

One other thing for 2007 besides what I previously listed:

In the Extended cab - have the doors open further than 80 or 90 degrees. Titans open to 135 degrees - a real nice and easy-for-Chevy-to-do-feature.

P.S. Regards the selection of engines. I think that new 4.2 six at 275 hp would make a nice choice for "non-tow" type drivers. Though the 4.8 and 5.3 engines might be fine engines - lets face it - GM can't afford to confuse the marketplace any longer. They can't afford to have a nice selection of engines. They need a limited number of excellent choices - nothing to slow down the decision making (other than color of vehicle) LOL.

White Lightening

[jeverett]

I'd put that I-6 in a Jeep..that would rock.

[qmaster]

In case most did not notice, that is an inline 6 cylinder engine. Inline engines build more torque per HP than a V configured engine will. The direct bolt on options and variable timing have been acomplished in diesel engine for quite a few years.

[BlenderWizard]

Originally Posted by qmaster

In case most did not notice, that is an inline 6 cylinder engine. Inline engines build more torque per HP than a V configured engine will. The direct bolt on options and variable timing have been acomplished in diesel engine for quite a few years.

That is an engine in V configuration with the same amount of cylinders. An I-6 will produce more HP and torque than a V6. I-6 is close to the same level as some v8's