What is the 3.9 v6 the general is using now?

#11

"scott" <scott.snowboard (AT) gmail (DOT) com> wrote

Quote:

I have not seen the new vehicle inside the hood yet, so here's a dumb
question, what is the deal with the 3.9 L engine they are using? Is
this a bored and stroked version of the new 3.6 DOHC high tech engine,
or just a bored out version of the 3.8 pushrod engine with VVT added?
The 280 or so HP they quote it generating is fairly decent, so i'm
thinking its a OHC model. If someone knows the details that would be
nice to know. GM just says the deplacement and power ratings, they
don't usually like you to know its a "outdated" pushrod design in the
literature.

Try this link:

http://media.gm.com/us/powertrain/en...ars/index.html

#12

"Mike Marlow" <mmarlow (AT) alltel (DOT) net> wrote

Quote:

"shiden_kai" <V-L-M (AT) hotma1l (DOT) com> wrote in message
news:q4vvh.828767$R63.839 (AT) pd7urf1no (DOT) ..

The OHC engines that GM has put out, without exception, have been
far more costly to repair then pushrod engines. Consumers would be
better off using the pushrod engines...lot less money when you have to
fix something.

And this is by no means limited to GM OHC engines Ian. OHC by its very
nature is more complex and more expensive to repair than a pushrod design.
This transcends manufacturer's lines.

I can agree with you for Vee engines. But for inline engines, the difference
is trivial, and the OHC engine might actually be easier to work on - just
depends on the cam drive. My 1972 Pinto with the 2L OHC engine was the
easiest engine I've ever dealt with. It was even easier than the 1.6L Kent 4
in my Fiesta (although the Fiesta was easy too).

Ed

#13

Here's a good article for everyone to read:

http://www.autoblog.com/2005/12/08/a...-the-definitiv
e-rant/

Steve

#14

HLS (AT) nospam (DOT) nix wrote:

Quote:

I am a Formula 1 fan,

Hey, me too! I'm just glad to finally see Shumacher out
of the F1 arena. I'm hoping that it will be more interesting
and less of his bs (apologies if you happen to be a Shumi fan).

Quote:

They switched the formula from V10 engines to V8s a year or two ago.
I believe they are still 3 litre engines, very special valving
systems, and put out
in the range of 700-800 horsepower...maybe more this season.

Yeah....these are very exotic engines. I still remember when the
Turbo 1.5 liters were around, they approached 1000 hp in
qualifying trim. Can you imagine?

Ian

#15

"shiden_kai" <V-L-M (AT) hotma1l (DOT) com> wrote

Quote:

HLS (AT) nospam (DOT) nix wrote:

I am a Formula 1 fan,

Hey, me too! I'm just glad to finally see Shumacher out
of the F1 arena. I'm hoping that it will be more interesting
and less of his bs (apologies if you happen to be a Shumi fan).

You can be sure I was NOT a Shumi fan, Ian. He was undoubtedly
one of the worlds greatest drivers, but very unsportsmanlike and
underhanded. His tactics could not be respected.

I am amazed that Renault was able to field a team as strong as the one last
year.
Absolutely phenomenal.

Ferrari proved their durability, but I like to see a strong competition.

Poor old sour faced Frank Williams has been relegated to Ford Cosworth,
which
is like, IMO, sleeping with the town tramp.

We'll keep in contact as the season nears.

#16

HLS (AT) nospam (DOT) nix wrote:

Quote:

We'll keep in contact as the season nears.

Absolutely....oh goodie...I get to "get up" at
5 am in the morning just to see a race!
My wife always thinks I'm crazy to get up that early.
It was difficult over the last two years to do
it as the excitement wasn't there as much, but
I'm hoping that we'll see better racing this
year.

Ian

#17

"shiden_kai" <V-L-M (AT) hotma1l (DOT) com> wrote

Quote:

HLS (AT) nospam (DOT) nix wrote:

I'm hoping that we'll see better racing this
year.

Fully agree on that. It is not much fun when one team dominates the way
Ferrari had done.

My wife doesnt complain too much when I turn on the Japanese or Australian
Grand Prix
in the middle of the night ;>)

#18

Grappletech wrote:

Quote:

"scott" <scott.snowboard (AT) gmail (DOT) com> wrote in news:1170040081.521877.245610
@l53g2000cwa.googlegroups.com:

I have not seen the new vehicle inside the hood yet, so here's a dumb
question, what is the deal with the 3.9 L engine they are using? Is
this a bored and stroked version of the new 3.6 DOHC high tech engine,
or just a bored out version of the 3.8 pushrod engine with VVT added?
The 280 or so HP they quote it generating is fairly decent, so i'm
thinking its a OHC model. If someone knows the details that would be
nice to know. GM just says the deplacement and power ratings, they
don't usually like you to know its a "outdated" pushrod design in the
literature.

I don't think it's a bored version of the 3.8 because why would they go to
the trouble of boring it out just for a measly extra 1/10 of a liter?
Unless their intent is to deceive people into thinking it's a brand new
engine perhaps. I wonder why GM still stubbornly embraces pushrod engines?
Get with the program GM.

I don't care for the hp and torque curves on OHC engines.
So far I've avoided owning a OHC engine.

#19

Quote:

I don't care for the hp and torque curves on OHC engines.
So far I've avoided owning a OHC engine.- Hide quoted text -

- Show quoted text -

I had a Maxima SE 5 speed with the 3.0 VQ engine (DOHC, 24 valve) and
it had nearly zero torque anywhere near idle. It would scream if you
drove it over 3000 rpm, but it was so easy to kill the motor just
driving it around. Sold that and got the '00 intrigue with the 3.5 GM
premium v6, with also OHC and 24 valves. Totally different motor
dynamics, it has a great torque curve but unlike the OHV cars I've
owned it doesn't go flat as it revs, it pulls (and smoothly) right up
to the redline. So don't put all the engines in the same bucket.

S

#20

"scott" <scott.snowboard (AT) gmail (DOT) com> wrote

Quote:

I don't care for the hp and torque curves on OHC engines.
So far I've avoided owning a OHC engine.- Hide quoted text -

- Show quoted text -

I had a Maxima SE 5 speed with the 3.0 VQ engine (DOHC, 24 valve) and
it had nearly zero torque anywhere near idle. It would scream if you
drove it over 3000 rpm, but it was so easy to kill the motor just
driving it around. Sold that and got the '00 intrigue with the 3.5 GM
premium v6, with also OHC and 24 valves. Totally different motor
dynamics, it has a great torque curve but unlike the OHV cars I've
owned it doesn't go flat as it revs, it pulls (and smoothly) right up
to the redline. So don't put all the engines in the same bucket.

The fact that an engine has overhead cams doesnt determine the torque
curve nor the horsepower development. It is what you do with the camming
that makes a massive difference.

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What is the 3.9 v6 the general is using now?

General Motors Discussions About General Motors vehicles (alt.autos.gm)

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 02:16 PM

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 02:19 PM

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 02:51 PM

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 05:54 PM

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 06:28 PM

Re: What is the 3.9 v6 the general is using now? - 01-30-2007 , 09:57 PM

Re: What is the 3.9 v6 the general is using now? - 01-31-2007 , 08:50 AM

Re: What is the 3.9 v6 the general is using now? - 02-01-2007 , 09:58 PM

Re: What is the 3.9 v6 the general is using now? - 02-01-2007 , 11:59 PM

Re: What is the 3.9 v6 the general is using now? - 02-02-2007 , 07:38 AM