so i was reading about the new Dodge-Hemi V8's and found out that when cruising or under light acceleration the engine shuts off 4 of the cylinders to decrease fuel consumption. I thought it was a pretty good way of saving fuel without hindering performance (the cylinders activate under medium to full throttle acceleration in milliseconds without the driver noticing, not hindering performance). Now driving down the road tonight i wondered if that same technology could be used in our In-line 4's? i know 2 cylinders is lame but under cruising or stop and go driving you really wouldn't need that much HP. What do you guys think? would it throw off engine balance? is there something already like this? it would definitely have some kick ass gas mileage.
i'm sure the computer would be pretty pissed.
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awe hell, while you're at it, just drop 3 of em and go down to 1 cylinder for even better gas saving performance.
it'd cost you more money doing all that work to the engine than you'd probably even save as a result of doing it for the lifetime of the car. which probably wouldn't last very long considering the strain you'd be putting on those two cylinders that are still active.
4 is the minimum number, that's why cars/trucks/suvs can afford to drop from 6 or 8 down to 4 and still run half way decent.
If you already have a stock 4 cylinder and you want better gas mileage, you're just plain greedy lol
www.kronosperformance.com / 732-742-8837
check the estimated mileage, from what i've
heard, it's not all that spectacular.
it isn't new technology either, was tried before and did not work out well. and besides, do you really want a GM engineer giving more ways for the engine to crap out on you.
could you imagine waking up to the raging 4-banger hemi because your MDS went out and you're 5 miles over warranty, will you be able to pay the few g's to get it fixed? or drive a truck that gets beat off the line by kids on tricycles?
it is a good idea, but if it does not move the mileage for highway at least up into the high 20's then it really is just a gimmick.
Your engine will hardly run without all 4 cylinders. Don't believe me? Pull one of the spark plugs and see what happens. It'll run, but barely. Now pull the companion cylinder (say, 1 and 4 are disconnected). The 2 and 3 cylinders can't produce enough power to even keep the car moving at cruising speeds. Ask anyone that's dropped an ignition coil driving down the highway. It's not a good idea.
it would throw the engine way off.
Viper98912 wrote:i'm sure the computer would be pretty pissed.
lets go with that theory...
and add a little bit of this theory...
Quote:
If you already have a stock 4 cylinder and you want better gas mileage, you're just plain greedy lol
GO PATS!!!
cannon fodder wrote:awe hell, while you're at it, just drop 3 of em and go down to 1 cylinder for even better gas saving performance.
it'd cost you more money doing all that work to the engine than you'd probably even save as a result of doing it for the lifetime of the car. which probably wouldn't last very long considering the strain you'd be putting on those two cylinders that are still active.
4 is the minimum number, that's why cars/trucks/suvs can afford to drop from 6 or 8 down to 4 and still run half way decent.
thought minimun was 3 like the Geo metro.
there is arguement that the geo metro never technically ran
GO PATS!!!
Quote:
there is arguement that the geo metro never technically ran
ahahahahahahahahhahahahahahaahhaahahh i like to laugh
15.4 @ 89mph
Well, if you set the Magnum/Accord Hybrid/etc to cruise on the highway I hear the gas mileage is pretty good because it runs at exactly a constant speed (well, more constant than my right foot) and only uses four cylinders because it's a constant speed.
Don't bother trying to do it to your car, come on man... you've gotta be kidding...
Sparks (Puddin') wrote:there is arguement that the geo metro never technically ran
exactly, we'll just forget about that bastardization of the automotive world.
This is something Cadillac did wayyy back in the 80's if I remember.. the Cadallic 8-6-4 or something like that. Total flop.
drive a yugo if you want good MPG
Im a Xbox 360 fanboy...and damn proud of it!!
Walk if you want good mileage
I know some race cars do it but that doesn't help you too much with your 4 cylinder idea. I'm thinking it wouldn't be enough power by just 2 or 3 cylinders to keep the car moving and even if it did, I don't think it would change the gas mileage a lot.
-Seth
cannon fodder wrote:Sparks (Puddin') wrote:there is arguement that the geo metro never technically ran
exactly, we'll just forget about that bastardization of the automotive world.
my bros old ford escort beater was runnin on only 3 cylinders for over a year.
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^ ^ ^ Just goes to show that new technologies applied to the automotive field need time to mature before they even become a realistic idea, much less an effective implementation in a real car that anyone can buy. It just needs to mature and be perfected like everything else. Just imagine how many catastrophic failures there were when the first turbochargers showed up! Even after engineers figured out how to get the damn thing to spool up in the first place, it just kept spooling and spooling and boosting and boosting till something just blew the hell up! Then a group of powerful minds had a brainstorm and invented the wastegate
The idea of asking an engine, which operates on a very sensitive, very presice, very unforgiving medium, to just turn off some of its cylinders is a pretty big deal. I'm sure it will mature into something cool later on... as long as some more effective and more cost-effective technology isn't developed before all the R&D is finished.
The MDS is a great idea, but it doesn't work on all the vehicles that it is on. It works for the 300s. Magnums, Chargers and Grand Cherokees, but not on the Ram. The Ram's aerodynamics prevent the MDS from even activating, and even if it did the truck is so heavy, my 2005 weighs 5300 lbs., that it is only good for speeds between 40-60 MPH.
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