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Brandon
Dodge Dakota
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3/19/2002
11:26:52
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 Subject: V6 and V6 Magnum?
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What is the diffrence in the regular V6 and the V6 magnum?
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FazDak
GenII
3/19/2002
19:18:31
|  RE: V6 and V6 Magnum?
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LOTS!
The nonMag is either carb'ed or TBI'ed, neither of which is as efficient as MPI.
The heads on a nonMag flow way less (in stock form) than Mags.
The Mag is controlled by a fairly complex PCM (the brains).
The exaust manifolds flow way better than a stock nonmag's
The cam uses a roller tappet, no more need be said bout that.
In short, its almost a whole different design that utilizes a lot of good principles for efficient power production however its about to be replaced (the Mag that is) by the latest in overhead technology.
Good luck and I hope that helps, Scott
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Brandon
Dodge Dakota
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3/19/2002
22:32:57
| RE: V6 and V6 Magnum?
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Thanks Scott I'm thinking about swaping my regular V6 for the MAG. Would I need a new brain, the trasmission should bolt up right? Thanks for your help again.
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FazDak
GenII
3/20/2002
10:02:48
| RE: V6 and V6 Magnum?
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Trans should be no problem but be ready for a wiring nightmare, alot will have to be switched and adapted. You will basically need the whole underhood wiring harness from the Mag donor truck.
Honestly, if your gonna do all that you should think of a V8, just a little more money and alot more power.
What year is your Dak?
Scott
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MARK A
Dodge Dakota
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3/20/2002
21:41:28
|  RE: V6 and V6 Magnum?
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MY 87 GEN-1 3,9 HAS ROLLER TAPPETS. CAME STOCK WITH THEM... PUT A GEN-1 340 IN IT ..
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FazDak
GenII
3/20/2002
22:19:54
| RE: V6 and V6 Magnum?
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Sorry, no such thing as a Gen I 340, they quit makin 340's in 73, I have one of the last ones.
Gen I 318 maybe.
Scott
PS/; didnt think Gen I's came with roller lifters, anythings possible though I guess.
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1FLAMED92DAK
Dodge Dakota
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3/21/2002
00:04:34
| RE: V6 and V6 Magnum?
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Did you know that most of the late 80's 318 had Roller Cams and lifters but they were JUNK Just like my 85 Chrylser 5th Ave which now has a full roller 340 in it and she passes California Smog. Just hope that the Smog Referee isnt in here hehehehehhehee And the 5th Avenue gets 24mpg on the freeway at 75 plus
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LI Blackdak
Dodge Dakota
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3/21/2002
01:16:56
| RE: V6 and V6 Magnum?
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V6 magnum=bad 175 hp
v6=worse 125 hp
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IntenseDak39
GenIII
3/21/2002
08:07:11
| RE: V6 and V6 Magnum?
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blackdak... just because it's getting kinda old, i did a little math for you... you complain about the 3.9 but it does better than the 4.3
if you look at the size of the motor the 3.9 makes more horsepower per liter than the 4.3
3.9 = 44.87 horsepower per liter
4.3 = 44.18 horsepower per liter
intensedak39
"How's my driving?........Race me and find out!"
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FazDak
GenII
3/21/2002
22:41:22
| RE: V6 and V6 Magnum?
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Nice math Intense!!!!
Scott
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dodgeboy
Dodge Dakota
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3/22/2002
00:25:02
| RE: V6 and V6 Magnum?
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ah god..ricer math..hp per liter...lol =P
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bernd
*GenIII*
3/22/2002
00:59:45
| RE: V6 and V6 Magnum?
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Ricers use Liters, Real Men (and women) use Cubic Inches!
"Got Rice?" (Hell, i've got Cubes!) ;)
1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph
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Super Bee
Dodge Dakota
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3/22/2002
01:42:14
| RE: V6 and V6 Magnum?
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i was thinkin about that
everyone calls it the 4.7
why not the 28X (not sure on what it actualy is)
shoudl be around 280-290
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IntenseDak39
GenIII
3/22/2002
05:47:26
| RE: V6 and V6 Magnum?
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hey hey hey.... if i used cubic inches i would of had to think a little harder! and because i don't know the cubic inches of a 4.3
175 HP/239 ci = 00.7322 horsepower per liter... i knew there was another reason i didn't do ci's!
bernd? how many liters/cubic inches is a 3.9 with only 5 pistons? OUCH!
(bernd's gonna rape me for that one!)
intensedak39
"How's my driving?........Race me and find out!"
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MARK A
Dodge Dakota
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3/22/2002
09:55:07
| RE: V6 and V6 Magnum?
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GEN 1 360 WITH 318 CRANK = 340
CHEVY 327 WITH 283 CRANK = 302
BEEN DOING THIS A LONG TIME
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FazDak
GenII
3/22/2002
14:14:41
| RE: V6 and V6 Magnum?
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Cant put a 318 crank in a 360, journals are different size.
Besides, why would anybody do that if they can simply go buy a 340 instead?
Scott
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Brandon
Dodge Dakota
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3/24/2002
10:07:32
| RE: V6 and V6 Magnum?
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Hey Scott it's be awhile scine I've had the chance to get on sorry. My truck is a 90'. Do they make any performance parts to sup up my moter. If so, how much more power could I get if I were to rebuild my motor and shave the head and port out the intake manifold and replace the cam with a better one? Thanks
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FazDak
GenII
3/24/2002
12:07:16
| RE: V6 and V6 Magnum?
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Brandon, check old posts, probably from a month ago or less, I listed a few old Mopar Performance part #'s for nonMag 3.9's. it was cam, heads, and intake.
Everybodys got different takes on it but this is what I would do if I were you. If your emission is strick where you are this may not be a good idea.
I would try all Mopar Parts dealers and see if they have any old MP parts laying around fro the preMag 6 as none of the part #'s I listed are in a current price list.
then I would have the heads worked by KRC.
Only if you were able to get the 4bbl intake from MP then youcould run a small 4bbl like a 500 or 390 (if there still made).
Then put 1.6 roller rockers on it, you should be able to use V8 ones if there not listed for 3.9 (you will have to modify the shaft a little).
Then get good TRW or a forged piston and throw NOS to its @ss!!
You would have a pretty potent combination there and you didnt have to do much else but engine work.
Oh you will need a MP electronic comversoin kit (dist,ecu, ballast and wiring)
I had a 89 Dodge ram full size 4x4 and I took the TBI off and went carb and put that kit on and it worked GREAT.
Feel free to email me directly and I will give you all the help I can.
Good luck, Scott
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Webslinger60
Dodge Dakota
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10/29/2002
00:40:41
| RE: V6 and V6 Magnum?
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Hey 1FLAMED92DAK, nice to hear you went from a 240 to a 268 cam in a 5th Ave & still pass smog.
How'd you do it? I also own an m-body & was surfing this site for info on Magnum exh manifolds. I hear they flow as well as the old 340s, have smog fittings, & are not expensive.
There a great alternative to headers (rust, clearance, etc) But they look like they'd be awful close to the firewal on a car? Know anyone who's done this swap?
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MoparDude340
Dodge Dakota
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10/30/2002
12:45:26
|  RE: V6 and V6 Magnum?
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Brandon,
FazDak has a good start for you. Also, if you are using the premag tranny, you need to cut out a slot in the bell housing for the crank position sensor to fit in. Also you need a crank position sensosr plate. If I remember right, you have a mechanical fuel pump on your premag, so you are going to need to run an electircal fuel pump.
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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dogliftsleg
Dodge Dakota
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11/03/2002
11:15:24
| RE: V6 and V6 Magnum?
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guess what there are 318 cranks with 360 journals out there you just gotta look around for them
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mmm3
Dodge Dakota
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11/03/2002
12:58:27
| RE: V6 and V6 Magnum?
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1986 and 1987 v-6 california 3.9 were 110 hp..
.
.
1971 360 and 318 cranks interchanged, makes a 360 a 340. . .
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FazDak
GenII
11/03/2002
15:07:18
| RE: V6 and V6 Magnum?
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Dog- if you find it let me know.
mmm- I have 3 LA318's, 2LA340's and 2 LA360's all of em are in pieces.
I will fly you to my house and if you can get a 360 crank in a 318 block (without machine work) you will owe me a million dollars, how bout that bet?
You guys need to do better reserch before giving these folks wrong info.
Check every Mopar service book look in every Mopar Performance parts book, all list different cranks for 318/340 and 360 because the main journals ARE different size.
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Jay
Dodge Dakota
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11/04/2002
00:08:48
| motor swap
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Have an 87 Dakota would like to yank 3.9 and put in an 82 318, motor mounts are all together different for the 318. Can I purchase motor mounts to put the 82 engine or can someone tell me how to fabricate my own?
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MoparDude340
Dodge Dakota
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11/05/2002
10:37:48
| RE: V6 and V6 Magnum?
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Jay,
This has been discussed here a couple times. Check out www.engine-swaps.com. They have what you need and info on what else to get. It's an easy swap, if you just take your time on it, and pay attention.
Later
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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Owen Pratt
Dodge Dakota
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12/05/2002
21:29:05
| 340 or 318 in 4x4 dakota
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I have a 1988 dakota 4x4 and wanted to no if a 318 or 340 will fit i am wonder about 4x4 axles being in the way of the oil pan also if i need a bigger tranny if it will still attacht to the transfer case. Also i was wonder with the edition of that power if the trasfer case would blow up and 4x4 axles would last
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rusty
Dodge Dakota
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4/13/2003
20:19:48
| RE: V6 and V6 Magnum?
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Did I understand this right ? does the magnum 3.9 have 50 more horsepower then the pre 91 v-6? please could someone clue me in! thanks Rusty
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FazDak
GenII
4/14/2003
19:37:38
| RE: V6 and V6 Magnum?
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Sorry dude but its on paper.
Worse than that is that the premag has a very narrow power band so it peaks and drops off at a fast rate as the mag makes its peake tq over a wider rpm range so even if its only 50hp (lol) more it feels like more because of how long its usable.
Dont mean to pee on anybodys parade.
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ClintonH
Dodge Dakota
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4/19/2003
11:42:14
| RE: V6 and V6 Magnum?
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I've been looking in to this for a while. I still haven't quite figured out everything yet. I have an 88 3.9 w/ 3 speed auto. The truck has been good to me but w/ 190K miles it's got no compression left in it. When I got the truck 4 years ago the thing pulled hard, especially down low. Since then I've done alot of mods but the power has only gone down cause the engine's wearin out. I was looking for an engine to rebuild, figuring that it would be easiest to prep a new engine then just swap it in place of the old one. I can't not have a vehicle for weeks.
But over the last few weeks I've really been wondering how hard it would be swap a magnum engine in assuming I could find a thoroughly wrecked donor truck that still had a good drivetrain (I'd like to upgrade the tranny if possible to 4-speed auto or atleast 3 spd w/ OD, but that's not a major concern). I'm not really worried about the engine electronics. What has me concerned are all the gauges and accessory wiring. How different are the gen-I and gen-II trucks with the obvious exception of the engine itself.
Also, being in S. Florida I NEED AC, not an option. I'm thinking the compressor will probably have to come off the magnum engine, but will the lines connect to the big fitting on the firewall.
I really don't want to start tearing apart the interior any more than I have to. I don't mind pulling the instrument clusters but any more then that would have me seriously considering the sensibilities of my actions.
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George
Dodge Dakota
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6/01/2003
11:34:27
| RE: V6 and V6 Magnum?
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right on FAZDAK, LA318,340,360 top end interchangeable. bottom end no way. 340 crank in a 360 why?????????????? total waste of money to make those mods.
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.......
Dodge Dakota
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6/01/2003
20:55:11
| RE: V6 and V6 Magnum?
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shorter stroke, more rpm's
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