3.9 V6

[DarkKnight]

Does anyone know anything about this motor? Sorry if this is old, but I was searching a little and all I came up with is it's supposed to be in the new G6. I couldn't find anything saying whether it was a 60* or 90* engine. It has some impressive specs either way.

Over on domestictunerz someone suggested that it might be a larger version of the 3.5.

Sorry I had to get this page out of google cache.

http://66.218.71.225/search/cache?p=3.9+g6+pontiac&ei=UTF-8&cop=mss&u=forums.domestictunerz.com/index.php%3Fshowtopic%3D7176%26view%3Dnew&w=3.9+g6+pontiac&d=1D9391CED0&c=482&yc=13543&icp=1

The Coupe and Convertible are still a year off, but the G6 will come in sedan form this summer. It shares the longer wheelbase of the Malibu MAXX, meaning it will be overall longer than a Malibu, but with short overhangs. I expect the coupe and convertible will be on the same wheelbase as the Malibu / Saab 9-3 convertible when they go on sale in 2005.

The first engines offered will be a 170hp & torque VVT 2.4L -- same one in the Chevy Cobalt and in the Pontiac Solstice. (The Malibu's base is still a 140hp non-VVT 2.2L Ecotec.) The 3.5L pushrod V6 (200hp/220torque) will be the "up" engine for now, but a GXP model will come later with a 3.9L VVT OHV (yes, the first pushrod engine in the world to utilize variable valve timing, as well as displacement on demand - unless the Z06 Corvette 600hp engine beats it to production) engine pumping out the same kind of horsepower and torque as a supercharged 3.8L engine in the Monte Carlo SS does now - somewhere around 250 hp and 270 torque, I'd guess. The 3.9 is a performance, larger displacement version of the new 3.5L engine, and unrelated to the 3.8L "3800" engine. This is all from memory so blast me if I'm wrong. :P

The will be no manual transmission on the models offered this summer. This comes with the coupe and convertible later - likely the same manual trans. used in the Saab 9-3.

We finally say goodbye to the 3.4L in the Grand Am "GT" with 180 hp. give or take Ram Air ( ) , and the 140hp 2.2L Ecotec that actually was rather short lived in the history of the Grand Am.

[Sorin]

It is a 60° V6 engine.

3900 info from offical GM website

And I don't know how true it is, but I've heard people here and there say it will have 3 valves per cylinder in some versions too, with horsepower being 270+.

3900 --->

3800 --->

3900 > 3800

[DarkKnight]

Attaining the engine displacement to maximize Displacement on Demand?s advantages created its own unique challenge, however. Michalski said that to attain the 3.9 liters of displacement Powertrain engineers deemed ideal, the 3900?s larger cylinder bores had to be offset 1.5 mm from the crankshaft center line so that the cylinders did not interfere with the camshaft. This required development of a new engine-block design for the 3900.

Damn, and I was scoping out my next swap project!!!

The 3900 incorporates many of the same features and components that have made the 3100, 3400 and 3500 OHV V-6s mainstays for numerous GM vehicles. For example, because of the processing demands of new features like variable camshaft timing and the active intake manifold, the 3900?s engine control module is the latest, most-powerful ECM currently used by GM. The Motorola-based E67 has 32-bit processing power and incorporates 32 megabytes of Burst Flash memory, 32 kilobytes of external RAM and 36 kilobytes of internal RAM, as well as a high-speed CAN bus to deliver optimal networking capability.

Yea, my 486 outta be able to tune/run that.

[mfuller]

3-valve heads are not on the drawing board for this engine.

It is a 60° V6 engine.

And I don't know how true it is, but I've heard people here and there say it will have 3 valves per cylinder in some versions too, with horsepower being 270+.

[Lyle's GTP]

VVT to me, just means more valve train issues. It's all bullshit to me, I'm waiting for the Cam-Less engine. That's the real future of the internal combustion engine. Displacement-On-Demand (DOD), is only capable of saving a couple MPG anyway, it's nothing people should be shitting their pants over. Same thing with the Hybid Gas-Electric. You're still burning gas to charge the batteries, then losing efficiency due to the internal resistance and weight of the batteries.

There is my 2 cents.

Lyle

[TheProfessor]

i would like gm to make a malibu maxx with the 3900 in it
i think its a good engine better than a L67 anyway
and its about time they stopped making grand ams

[Sorin]

i would like gm to make a malibu maxx with the 3900 in it
i think its a good engine better than a L67 anyway
and its about time they stopped making grand ams

I hope they put it in at least the regular Malibu. The 3500 is good and all, but GM is about 5 years too late with that power level. 3900 is far better than the L67 Same output, no boost.

Now if they boost it. . . . . .

I don't mind Grand AMs, I just think it sucks that there won't be Aleros anymore If only they'd have stopped making Grand AMs instead of Aleros.

[DarkKnight]

If this really is a 60*v6, then shouldn't there be something on the main page about it?

[bszopi]

http://www.60degreev6.com/index.php?p=sections&sid=24

Been there since Oct 28, 2003...

[xxrollin]

I thought the new G6 is basically a new Grand Am. I like the looks of it as a 4-door and cant imagine in as a 2-door. And yeah, the alero was a sweet looking car too, its ashame GM decides to get ride of certain models and not the others that have no reason to be on the road. But anyway, the G6 as far as everyone I've herd from is a grand am, cant wait for the supercharged V6 model with a 6-speed, if it ever happens...

3-valve heads are nice and all but I cant see it on a pushrod set-up. Think of what the intake ports will look like. They'd be long(tall) and narrow, alittle to narrow to clear 3 pushrods. Unless they have someway to get one pushrod to act on 2 valves, then it'd have to be one hell of a pushrod to take the pressures of 2 springs or probably lower the rev range to 4500 cause they'd have to use some really light springs. I dunno, maybe a SOHC set-up would be better. The variable valve timing feature is what I'd like to have. To eliminate the DOD system, swap the lifters to standard style. Be a sweet engine though..

[Sorin]

Well, the G6 is replacing the Grand Am, but it's not actually a Grand Am. The two vehicles are totally and completely unrelated, part wise. But yeah, Grand Am goes out, G6 comes in. The Grand Am is an N-body, like the 1997-2003 Malibu. However, the G6 is on GM's brand new Epsilon platform, which is shared by the 2004+ Malibu, current Opel Vectra, and current Saab 9-3. As a side note, this platform is setup for both front wheel drive and all wheel drive. Also, the nicely praised handling characteristics are due to the platform being globally developed, ergo needing to satisfy European standards.

Anyways, yeah. The G6 replaces the Grand Am. Although, the G6 will also come in AWD, convertible, and 2+2 versions.

So as of this coming fall, Grand Am is out and G6 is in, as a 2005 model.

2005 Pontiac G6 information from GM

Highlights of the G6 include the 240hp 3.9L V6 and 6-speed manual.

[Cliff8928]

Oh, and FYI, the new malibu and it's epsillon counterparts are Z bodies (although, it looks as if GM hasn't completely assimilated saab yet into the VIN system)

Cliff Scott
89 BerettaGT
89 Volvo740

[xxrollin]

I guess if or when I buy a new car, it just might be the G6 with the 3.9 and the 6-speed. I'd love to see an all wheel drive model. I'm right now looking into the Trailblazer or the Envoy with the 4.2 striaght 6. So a year from now the 6-speed model might be out and I'm gonna get it....

[GPXSS]

VVT to me, just means more valve train issues. It's all bullshit to me, I'm waiting for the Cam-Less engine. That's the real future of the internal combustion engine. Displacement-On-Demand (DOD), is only capable of saving a couple MPG anyway, it's nothing people should be shitting their pants over. Same thing with the Hybid Gas-Electric. You're still burning gas to charge the batteries, then losing efficiency due to the internal resistance and weight of the batteries.

There is my 2 cents.

Lyle

Coats Rotary Valve BABY!!!!!