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leadbedr
Dodge Dakota
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6/25/2003
20:10:13
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 Subject: how much power out of a 3.9
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Hey all
So i have been toying with the idea of building up my 94 sport.
Im pretty sure i can get the 5.2-5.9 powerdyne supercharger to fit. But that only runs 6-7 lbs. Even on the 3.9 tops would be about 7-8 lbs. So if all things are good then i would gain about 60-80 hp making it about 225 hp at the crank.
Now if i went with all the other stuff also, 48mm throttle body, headers, cat-back, 4.10 gears, and whatever else. Do you think it would be worth it?
Id be looking at roughly 5 grand to get maybe 200-220 hp at the wheel.
Thats a good jump in power but its still only 200 hp for a 4000 lbs truck.
Any thoughts???
thanks
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J and J Auto
Dodge Dakota
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6/25/2003
20:33:53
|  RE: how much power out of a 3.9
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Well maybe,
I spent just over $6000 on mine.
Stroked it 258 cubic inches 4.23 liter
with a 3.58 stroke custom crank
Ported heads
Mod intake manifold.
1.7 RR's with a custom cam
.480 lift with 268 272 duration
headers no cat
F&B 48mm
MSD Ignition
Ram air
ASE Chip
Now have mopar PCM
9.8 to 1 custom KB pistons
I did everything and anything I could to grab
more horsepower and HP cost money no matter
what you are working on. I considered a V8
but anyone can do that so I stuck with the V6
I have 30 years exp building mopars I would not
recomed this stuff to the average Dak owner
With a road speed simulator fan I pulled
247hp/290 foot pounds of torque but I would
say a lot of that has to do with the higher
stall torque converter I am running.
The Mopar performance PCM seams a little stronger
than the ASE Chip have not dynoed yet.
I am giving some thought to a blower myself, On
top this motor it would be pure insanity.
This thing just screams, revs like a bitch
and the gas milage is just fanominal 24 25mpg
when I drive half way normal. Top end around
130mph, Its Nuts but I love it and have no
regrets for all the money I spent.
Larry
J&J Auto
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Jon
Dodge Dakota
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6/25/2003
20:46:05
| RE: how much power out of a 3.9
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I estimate i am running around 230 horsepower at the flywheel (probably 180 at the tires) and the truck moves pretty good. A decent throttle body, intake, and exhaust in combination with the supercharger would make you pretty happy. I had to get some wider tires to keep from spinning the tires in the rain.
-Jon
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J and J Auto
Dodge Dakota
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6/25/2003
21:06:34
| RE: how much power out of a 3.9
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Message:
I know what you mean about tires.
If I push the throttle over 1/4 inch from a dead
start it smokes them even with the sure grip.
If I hold it over half it chirps second.
I usualy just barely touch it untill its out of
first at aroud 25 30mph than I will tromp it.
There are a lot of people that will not even get
in my truck for a ride.
Well enough of this I usualy just come here to
see if I can help people out with there probs
rather than sitting in the bar or fighting with
the old gal.
Larry
J&J Auto
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96Dak
Dodge Dakota
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6/25/2003
22:30:45
| RE: how much power out of a 3.9
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Huh? $6000.00, and less than 100 HP gain? Isn't the 3.9 Magnum rated at 175 HP, 225 lb. ft of torque? Are you talking rearwheel, or flywheel?
I'm not trying to being critical, or a smarta**, but what am I missing?
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J and J Auto
Dodge Dakota
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6/25/2003
23:15:33
| RE: how much power out of a 3.9
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Message:
What you are missing is the 25% loss just by
having 2 less cylinders than a V8, and the
avalable parts for the V6 are like non exsisting
The same mods on a V8 would give you a lot
more HP I would say more like 40%
Larry
J&J Auto
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leadbedr
Dodge Dakota
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6/26/2003
03:14:17
| RE: how much power out of a 3.9
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Message:
I want to do it with the v6 for that reason. Not many else have.
Larry- Have you run the 1/4 mile? ANd whats that road simulator? Kinda like a dyno? Are those numbers at the wheel? And all that custom stuff, where did you get it made? Can they make more?
I dont really have a problem dumping some cash into my dakota, but i want it to be worth it.
I know i could just go get and old camaro, firebird, mustand or whatever and put 5-6 grand and have a very fast car. But i want something a little differnt.
Thanks for the info
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Ray Kolbe
Dodge Dakota
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6/26/2003
07:14:39
| RE: how much power out of a 3.9
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Yeaaaah...I got a V6 in my 93 dak......im right there with what you guys are doing (or its what i want to do)..hehe. Any tips and tricks that are helpful, please send my way.
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J and J Auto
Dodge Dakota
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6/26/2003
12:16:17
| RE: how much power out of a 3.9
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There is a stroker kit available at
http://strokerkits.com/3_9_chrysler_stroker.htm
I bought the 4.0 stroke crank my crank guy had
for $1500 and I also bought a 1990 Dak 4X4 with
214,000 miles on it I will be building next. The
body is perfict and rust free that's why I bought
it. I am now looking for a 2000. I am building a
collection of Daks with 3.9's Gen 1, 2 and 3.
The heads were done by KRC
http://www.krcperformance.com/newcontent/home.html
You can call Crower or get a hold of Sam at
So Cal Dakotas and he can get you any grind cam
you want for the 3.9
http://www.socaldakota.com/frame.htm
performanceparts@cox.net
The intake and the rest of the mod's I did myself
As I said I have no regrets for the money I spent
on my 95 and plan on building 2 more trucks just
like my 95, I Love These Little Dak Trucks with
a passion.
Sure I could build V8's but I fell in love with
the V6 motors and its unusual to see a built V6
Larry
J&J Auto
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J and J Auto
Dodge Dakota
JOIN HERE
6/26/2003
12:21:57
| RE: how much power out of a 3.9
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Oh the simulator fan is just a big fan in front of
the dyno that simulates the air flow you get when
driving down the road. Computer controlled by
the speed your rear wheels are turning.
With out you would not get a true test because
going down the road you have air blowing in the
intake and helps cooling.
Standing still on a dyno without you would get
lower #'s it would get hot and not as much air
hitting your intake.
Larry
J&J Auto
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Spencer
Dodge Dakota
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6/26/2003
16:51:31
| RE: how much power out of a 3.9
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are the pistons in the magnums and premagnums the same? i know the crank is, just not sure of the pistons, because i have a premagnum, and that stroker kit seems like a good answer
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leadbedr
Dodge Dakota
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6/26/2003
23:33:25
| RE: how much power out of a 3.9
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Message:
Larry,
That stroker kit,
http://strokerkits.com/3_9_chrysler_stroker.htm
thats the one you have?
It says it strokes it to a 4.0. How did you get to 4.23?
thanks
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J and J Auto
Dodge Dakota
JOIN HERE
6/26/2003
23:53:38
| RE: how much power out of a 3.9
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Message:
No I don't have the 4.00 stroke in my 95 its
3.58 stroke and the numbers work out to 4.23 liter
258 cubic inches.
Our crank guy got his hands on 2 raw billits and
ground one to 3.58 and 1 to 4.0 stroke. I bought
the 3.58 for my 95 with a set of H beam rods
and had a set of pistons made.
Now I went back and bought the 4.0 crank I will
be putting in the 1990 I just bought.
$1500 each crank.
I am going to see what pistons they are using at
stroker kits.com I may just buy the rods and
pistons from them. Don't know what comp they are
but I don't plan on starting my next build for
a while just thought I would grab the crank while
I could.
So my next one will be just what they are selling
at stroker kits.
Still catching a little hell for all the money
I spent on my 95 so I better hold off for a while
she knows I bought the 90 but not the crank and
have plans to build another beast.
Larry
J&J Auto
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leadbedr
Dodge Dakota
JOIN HERE
6/27/2003
00:04:50
| RE: how much power out of a 3.9
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Message:
Thanks for all the help and info Larry.
Im sure ill be askin you some more.
thanks
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Chris
Dodge Dakota
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6/27/2003
12:03:37
| RE: how much power out of a 3.9
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Message:
Yeah i have a 94 with 166,000 miles on it, i intend to rebuild the motor, just not back to factory specs. I was wondering how much cost and how much power would i get out of it if i have the engine bored out? I am not really sure what that will do or how far over the cylinders can be bored. Also, the performance parts are there if you look for them. Until now i did not know anyone made headers for this. JBA makes them and they also have a supercharger for it. What else do you really need?
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leadbedr
Dodge Dakota
JOIN HERE
6/27/2003
18:55:48
| RE: how much power out of a 3.9
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Where did you see a supercharger kit for a 94 v6?
I want to a machine shop today and got some info.
To completly rebuild. Including port and polish, bore it .03 over, custom pistons, custom cam, blueprnting, and various little things the rough estimate was 2500-4000.
And that would be building the motor to hanlde 10-12 lbs of boost
And with all that it would gain approx 100 or hp at the wheel.
Then add the 5.2 supercharger kit for about 3000 and youre close to 325 at the wheel.
.
So for about 7 grand i think the truck would go pretty good.
Of course there are the people that will say to just brop in a 318, but what the fun in that.
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J and J Auto
Dodge Dakota
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6/27/2003
19:22:14
| RE: how much power out of a 3.9
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Message:
Take a look at this I am sure you could make it
work on a 94
http://www.krcperformance.com/newcontent/v6super.html
Larry
J&J Auto
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Chris
Dodge Dakota
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7/09/2003
11:45:08
| RE: how much power out of a 3.9
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Hey, i just ordered a set of headers, i got to send them back, they were sent to me already rusted. Anyways, is it better to rebuild the engnine first before i try to do other things to it? Also, how much power can be gained by boring out the cylinders?
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moparaddict
Dodge Dakota
JOIN HERE
7/10/2003
04:17:52
| RE: how much power out of a 3.9
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Message:
I'm in the process of rebuilding a 3.9 too. I'm slowly gathering the parts, and I looked at the 4" stroker cranks from strokerkits.com. My end findings led me to suggest the costs did not justify the end results. I mean for $1500 youre only gaining 54 cubic inches (assuming you went .030 over on your bore) I've played with the dyno2003 engine program a lot, and that 292 ci only will produce about 253hp.
I decided to create the power on the top end with a good cam & head combo, and by lightening the rotating mass (pistons and rods). I'm using the diamond racing pistons and eagle I beam rods, which offer significant weight savings when compared to the stockers. The end result is 248hp/279tq.
I'm actually anticipating more than the dyno program is projecting when everything is properly tuned.
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leadbedr
Dodge Dakota
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7/10/2003
18:31:14
| RE: how much power out of a 3.9
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Message:
Well after doing alittle more research I dont htink ill be building up my v6. I figured it would be close to 6-7 grand to make about 325 rwhp.
Althought it would be kinda cool, for that much money i could buy an old v8 car and have closer to 6-700 hp.
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J and J Auto
Dodge Dakota
JOIN HERE
7/10/2003
22:34:13
| RE: how much power out of a 3.9
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Message:
moparaddict,
My last dyno was 247/290
with ASE Chip, Fastman and Apexi
Now running 48mm F&B and mopar performance PCM
and its running with no fuel controller now
and feels like I gained an easy 20HP on my
modified stroker engine.
With the front driveshaft and CV axles removed
down at union grove I ran 14.4 at 97 1/4 mile
sactioned track
I lose about .5 with the shaft and axles installed
Will be running a dyno in a week or 2, I was
holding off on any tests untill I hade it broke
in now have over 4,000 miles on the stroker and
man she cranks.
Larry
J&J Auto
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moparaddict
Dodge Dakota
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7/11/2003
06:05:32
| RE: how much power out of a 3.9
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Message:
I'm currious how you got a mopar performace PCM working on a v6... I tried looking at one for my 98 and came up empty haded.
I do want to maybee touch base on the cranks, I'm wondering if you can modify a stock crank to get .2 or .3 more out of it. As I said before i'm only really in the planning process, so if I can get a few more ci's out of this puppy, i'm more than open to ideas.
P.S. Do you go to union grove often?? i'm heading there from IL on the 25th.
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J and J Auto
Dodge Dakota
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7/11/2003
09:13:09
| RE: how much power out of a 3.9
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Message:
moparaddict,
They only made a performance PCM for 92 93 models
but they will work on 92 to 95 OBD1 I have a 95.
There is no mopar PCM for your truck, but you
have 2 choices on the 98
super chips microtuner 98 - 00 or the ASE chip
http://muscletrucks.net/catalog/superchips.htm
http://www.asechips.com/
I seen the tuner run on V8's not bad
ASE chip, I have 1 and they help a lot just not
as good as the mopar but very close. a nice
upgrade over stock.
I seen 2 dynos on the V6 with ASE 1 pulled 17 and
1 19 RWHP on a stock set up.
I never heard of anyone welding and regrinding
a crank to change the stroke.
We go to the Grove once in a while with our 10
second cars. Last year a 69 road runner did
10.02 1/4 mile.
Larry
J&J Auto
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Osyrus
Dodge Dakota
JOIN HERE
7/12/2003
13:44:38
| RE: how much power out of a 3.9
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Message:
First post here, altho I have been reading alot of the threads for about a month now and gotta thank ya all, Iv been learning alot.
I have a 97 Dak 4x4 with only 38,000 miles got it for $11,000 and plan on making it my first project vehicle. LOL, jsut put my first mod on today, a new Air Intake :) My list for things to come are growing by the minute!
Anyhoo, I dont have anything to contribute just felt like commenting, Latar!
Oh wait, yes I do? Does anyone make a supercharger for the v6 dakota, havent been able to find anything about it anywhere~
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leadbedr
Dodge Dakota
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7/13/2003
12:29:37
| RE: how much power out of a 3.9
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Message:
from a few posts up
http://www.krcperformance.com/newcontent/v6super.html
And i think you could make th e5.2 supercharger work also.
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