Date: 15 Feb 2005 16:42:38 GMT From: Dave Hinz <DaveHinznospamcop.net> Subject: Re: new saab motor for 9-3 series
On Mon, 14 Feb 2005 23:23:21 +0000, Colin Stamp <col.dustbinnospamp.plus.com> wrote: > OK, I'll bite... > > > On 14 Feb 2005 21:05:59 GMT, Dave Hinz <DaveHinznospamcop.net> wrote: >> >>The V6 is an inherently unbalanced design for an engine, > > Not sure about unbalanced. A six will always be smoother than a four > pushing out the same power - smaller bangs and more of them. At any given TDC, three pistons will be at the top. Two will be on one side, and a half-revolution of the crank later, they'll be on the other side. Vastly oversimplified, but it's a dynamic load on the engine that doesn't exist in a V4, V8, or an I-anything. >>and adds >>complexity and fuel consumption for little to no benefit. > I'd always seen increasing the cylinder count as a perfectly sensible > way of increasing the displacement whilst keeping the cylinders > reasonably small. Going from straight to V does add a lot of > components though. There's plenty of straight sixes about, but they're > a bit long for most applications. I don't have any complaints or concerns about an I6. >>The only >>people who care about a V6 are those who want to count pistons >>instead of learning about why engine management and control is more >>important than the number of spark plugs you have. > > Steady. I was quite fond of my V6 Alfa... Well, not to dis the Alfa, but... >>In other words - the only people who want a V6, are those who >>don't know enough to know it's a step backwards. > > If you want an engine over about 2.5 litres, your four-pot options are > virtually non-existant. As far as I'm concerned, it doesn't have > anything to do with the number of pistons. It's all about the age-old > displacement vs. turbo debate... Well, sure, but if you want 6 pistons, arranging them in a V is a poor choice. I don't know of any V6 engine that has the reputation for longevity that, for instance, the Saab I-4 2.0 engine does. Dave Hinz
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