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101Volts 11-20-2013 05:07 PM

On/Off switch for two cylinders in van engine?
How would I convert the engine in my Father's 3.0 Litre 6 Cylinder Caravan to run on four cylinders instead of six? I had this idea as my Grandfather had a truck which could go from eight to six cylinders though I don't know much else about it.

Frank Lee 11-20-2013 05:32 PM

You've been here a while; search cylinder deactivation.

Basically, it isn't going to happen.

cRiPpLe_rOoStEr 11-20-2013 07:15 PM

Maybe a 2.5L 4-pot to replace the current 3.0L V6 could be a good option, since it would benefit from lesser internal friction (thus improving efficiency) than deactivating 2 cylinders which would still generate some drag for the other 4 cylinders to overcome.

101Volts 11-28-2013 07:17 PM

I could do that (Replace the engine with a 2.4 Litre model) but might wait, And end up with a 2002 2.4 Litre model instead; Those get higher FE than the 2000 models according to

2000 2.4 Litre (Average Range of 407 Miles estimate, 12 miles higher than the 3 Litre estimate - And I've seen 28.56 MPG or so on a 359ish mile tank)

2000 Dodge Caravan 2.4L fuel economy review (model for North America U.S.)

2002 2.4 Litre (Average range of 440 Miles estimate)

I'm already capable of managing 24 MPG in the 2000 3-Litre; 26 is easy in a 2002 2.4 Litre with the ways and places I drive with what mods I have (Mostly without city/town miles lately.) Plus some mods and? I'm already sitting on 30.

cRiPpLe_rOoStEr 11-29-2013 01:59 AM

That would be better. BTW have you never considered a Diesel engine swap for the van? I have once seen a Caravan with Argentinian plates and the Euro-spec 2.5L VM Motori turbodiesel...

101Volts 11-29-2013 11:35 AM

Wow, No I had not but now I'm thinking of it! That would up the MPGs considerably high, Particularly keeping Diesel Dave's White Whale in mind. I'd actually like to do that.

Oh and BTW, The fifth generation caravans all get lower MPGs than the 2002 model (I didn't even see a 2.4 litre fifth-generation model, is there one?) despite being more aerodynamic, According to Automobile-Catalog.

jakobnev 11-29-2013 03:35 PM

Some year models came with a manual, that would let you shut off all six cylinders. ;)

cRiPpLe_rOoStEr 11-30-2013 08:50 PM


Originally Posted by jakobnev (Post 401316)
Some year models came with a manual, that would let you shut off all six cylinders. ;)

But it might be harder to find one in America than in Europe.

ksa8907 11-30-2013 11:10 PM

If I'm not mistaken, the 5 spd caravan was only available with the 4cyl and only in early models, around '93-'95 maybe?

cRiPpLe_rOoStEr 12-01-2013 01:42 AM


Originally Posted by ksa8907 (Post 401459)
If I'm not mistaken, the 5 spd caravan was only available with the 4cyl and only in early models, around '93-'95 maybe?

Not sure if exclusive to European versions assembled at Magna Steyr, but after that there were still some with manual transmission.

ksa8907 12-01-2013 08:32 AM

According to wikipedia, I know I know, the manual trans was available from '84 - '96.

slownugly 12-01-2013 09:36 AM

I actually just saw a caravan for sale locally that was 5 speed and it was the newer body style. I hate caravans I think they are junk but that raised my eyebrow. Let me see if I could find it.

Edit: couldn't find it. It was a while ago that I saw it. I did see a box style one though that had factory 4cyl turbo 5 speed. That would be fun

cRiPpLe_rOoStEr 12-01-2013 09:57 AM

Eventually that one might have been retrofitted, but then I don't know. Regarding European models, maybe the manual was available only for the Diesel versions...

101Volts 12-01-2013 11:24 PM

If I had a 2.5 litre (Or whatever size that's close to that) diesel manual caravan the size of the one I've been driving I think I could manage 29 per tank easily even without EOCing, I'm already getting 24 easily in a gas engine with an auto transmission. Add a little EOCing and there's already 35.

Come to think of it 35 wouldn't be unheard of in a 90s whale station wagon if I stuck a Diesel engine and Manual tranny in it and added LRR tires. But, I don't even have such a car on this day in December 2013, I'm just observing it.

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