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Kowalski
GenIII
4/07/2008
16:00:02
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 Subject: RE: Modifying O/D for better MPG's? Ideas?
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Proven to who ? I haven't even seen any explanation from you as to how the milage was calculated - if it was...
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MoparMan
Dodge Dakota
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4/08/2008
16:04:00
|  RE: Modifying O/D for better MPG's? Ideas?
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You can try a taller tire, but it may upset your speed sensor. I put a 255/60 on my R/T and it has helped a little
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i hate cars
Dodge Dakota
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4/08/2008
22:39:24
| RE: Modifying O/D for better MPG's? Ideas?
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I checked with my psychic, of course... Duh. fill tank run vehicle, fill tank do the math miles driven versus gallons of use... And yes, pretty certain the odometer is accurate... BTW, I've been turning wrenches since 8 and straightening bodies since 14... currently the lead bodyman at a State Farm preferred shop... I'm not some kid that aint been around. Honestly i was expecting a "no kidding" kind of response. I've owned half a dozen dodge trucks and driven at least twice that many and am shocked that you guys are having trouble with this. I have not owned any 94 up full size so maybe they suck too. I don't know. howsoever, on the topic of mods, I'm considering pulling the 276's out of a spare dart 8.25 and throwing them in one of my spare dak rears and seeing what that does. supposed to work but I haven't personally tried it yet
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gen1dak
Dodge Dakota
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4/09/2008
01:26:52
| RE: Modifying O/D for better MPG's? Ideas?
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What years are the wife's Dak and the HD truck?
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Kowalski
GenIII
4/09/2008
15:58:49
| RE: Modifying O/D for better MPG's? Ideas?
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You'd probably be surprised how many guys we get on here who don't figure mpg corectly, nice to see you're not one of them. I got 20 mpg out of a 318 in a '70 Coronet; that was after swapping to dual exhaust and the bigger 2bbl carb off a 383. Stock was 18, that's the most efficient 318 I've owned. I'm guessing your comparing a more powerful magnum 318 in the Dak, against an LA in the bigger truck. He must have it dialed in pretty well, that's terrific milage for towing a car. So maybe it's not just the Dakota making the difference; maybe the type motor we are comparing ? One drawback the 4x4 Daks have is that the front end is turning all the time. A bit of friction there - but not like the difference you see. It's a very capable smaller truck that generally gets better milage than the comparable heavier full size, which also has more sail area.
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gen1dak
Dodge Dakota
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4/09/2008
23:36:43
| RE: Modifying O/D for better MPG's? Ideas?
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Same here. My old '69 Charger with 318 averaged 19mpg with headers/duals/mild cam, 4V carb, SP2-P intake and 2.76 gears. Those small ports really filled the cylinders for great cruising torque. That's why I was asking about the years...was kinda thinking maybe the tow truck had an LA. A couple years ago my dad and I were towing a couple big boats. The LA 360 Dodge just made the 360 Magnum look puny, and the LA was towing the boat that was at least 2 tons heavier (7-8,000 lbs vs 11,000 lbs). Now, in a drag race, with no load, the Magnum would walk off, but loaded down, the old LA was the boss.
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i hate cars
Dodge Dakota
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4/11/2008
22:26:42
| RE: Modifying O/D for better MPG's? Ideas?
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Ok guys, I'm tired of this. so this is it for me... You guys are just too durned smart... both trucks are 92's both magnum 5.2s. I can tell you they're the same down to items such as fuel rails etc. BTW... just for info. mag 360 is rated pretty durned close to mag 318... thus making it a kinda mute point in stock form... however, just compare torque and hp spec on magnums and LAs and you'll see the magnum must be sick, or the la must be modified, or there is a significant gear difference. oh, and I've owned literally more mopes than I can count off hand the oldest being a 52 panel and the newest 97 intrepid... but my favorite is my 72 swinger 360 though it doesn't get no 20 mpgs. Oh and that 3/4 ton truck went just over 1400 miles round trip to NC from IL and brought back my bro's 66 coronet 500 conv. big block and burned just over 100 gallons of fuel total. My math aint good, you figure it out
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gen1dak
Dodge Dakota
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4/12/2008
02:14:24
| RE: Modifying O/D for better MPG's? Ideas?
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The 5.2 in the tow truck is gonna have more ignition advance at lower rpm than the Dakota, so it has better real-world torque which may account for the better mileage figures.
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Kowalski
GenIII
4/12/2008
08:23:39
| RE: Modifying O/D for better MPG's? Ideas?
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That's 14 mpg, but it sounds like it was only loaded with the car for half the trip. To acurately figure the milage it got while towing the car, you'd have to know how much fuel it actually burned on that half of the trip. The mag 360 isn't as close to the mag 318 as you think. It looks like you are using the deceptive peak power numbers to make your comparison. It's more important to look at the power under the curve in an rpm graph; where you'd see the 360 makes much more torque at lower rpm than the 318. We see guys mistakenly believing some sixes are as strong as our v8s when they don't take that into account. I suspect you are using peak numbers to compare LA to magnum as well. If so, that isn't the best way to compare. Any gear difference is taken into account on a dyno; and gear differences don't matter in the factory numbers - they bolt the motor directly to a dyno. Sorry these aren't the answers you expected...
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gen1dak
Dodge Dakota
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4/12/2008
16:36:57
| RE: Modifying O/D for better MPG's? Ideas?
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And if he was prudent, he didn't tow that car in overdrive.....or was it a stick shift? If auto, and OD locked out......there goes the mileage even more.
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Super bee
GenI
4/14/2008
13:47:29
| RE: Modifying O/D for better MPG's? Ideas?
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bah,
i still say towing is good territory for a cummins
i got 16 mpg towing my dakota around on a car trailer
1990 sport RC SB, 1995 318drivetrain, 3.92 gears (came with truck) Powertrax "traction system", 95 dash/steering wheel, hearthrob exhaust, headers, cutout after y-pipe, necessary electric fan add-a-leafs, 30x9.5 mud tires, cranked T-bars, AR 39 15x8 rims, grill guard, roll bars
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fotodak
Dodge Dakota
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4/15/2008
13:46:42
| RE: Modifying O/D for better MPG's? Ideas?
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Kids, the Magnums ARE LA engines, the 91-67 are pre Magnum.
The V10 is a LA engine...same basic block, same bore centers, etc. They cut off 2 holes to make the V6, they added two to make the V10.
That being said I wish my Dak got the mileage of my old 73 Charger, 318, 727 and 2.76 gears. Would knock down 24 mpg no sweat. Put 200 k on that thing and ran the crap out of it.
heck, I had a friend with a 70 Charger RT, 440, stock manifolds and MPG cam, 4.10 gears and he could get 20mpg out of it!
I proved it to me-I had a 72 318 Charger (later a 360) that would get 19-20 and we followed each other on a short trip. He took fewer gallons to fill up than me.
But that was back in the days of REAL gas. In the five years I've owned my truck every time the gas gets reformulated mileage suffers. It used to get 23, now it's about 18.5, with new O2, factory exhaust, you name it.
Only thing hurting it would be it needs a timing chain REAL bad.
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Kowalski
GenIII
4/15/2008
15:48:03
|  RE: Modifying O/D for better MPG's? Ideas?
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fotodak - "Kids" ? I don't think so.
The magnums are basically LA blocks with different heads. None of us were calling those LA engines "pre-magnums" when they were newer (before magnum came out). It wasn't wrong to call them simply "LA" then; so I'm not so sure that is wrong now. Either way, you know what we are referring to - there's no need for your "kids" put down.
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Kowalski
GenIII
4/15/2008
16:14:32
| RE: Modifying O/D for better MPG's? Ideas?
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One more thing - a magnum block has a different style motor mount boss on the block.
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gen1dak
Dodge Dakota
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4/15/2008
18:53:15
| RE: Modifying O/D for better MPG's? Ideas?
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And the V6 and V10 are NOT simply the same blocks with 2 cylinder added or subtracted.
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