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nuttydriver
Dodge Dakota
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3/11/2002
22:11:11
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 Subject: RE: 3.9 v6
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i think the problem with the low hp ratings in the dodge engines is the fact that they concentrate on emissions so much. i have a 99 sport with a 3.9 v-6. it has a lot of get up and go but i plan on getting more out of it. if you look at the headers on the newer dodges they have all kinds of emissions crap that is sure to reduce a lot of power. i plan on getting performance headers and putting flowmasters on my truck without a cat. the other thing i noticed is that the computer is programmed to give you the best fuel milage possible. not the most hp. if you get a new chip it make one hell of a difference. i think i gained 20 hp with mine. well good luck to ya all.
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Alan and Anne
Dodge Dakota
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3/11/2002
22:14:37
|  RE: 3.9 v6
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I just bought a 1988 Dakota with the 3.9L and auto trans. It runs real rough/misses/backfires in the mid range. Hi revs are good and low revs are good? I have been trying to find a repair manual. Since it has a carb/distributor I should be able to tune it myself. Not much different than the flat head 4 banger in my boat. Anyone know adecent repair guide for the 88?
Further, the letter above regarding horse power of modern engines: My Ford Cobra came with 320 HP, now has 360 HP in a 4.6L engine. The 2003 Cobra will have 390HP! (to compete with Vette, and BMW M3)
ps. not trying to start a HP flame war.
Thanks,
Alan
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LI Blackdak
Dodge Dakota
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3/12/2002
00:48:33
| RE: 3.9 v6
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cobras are monsters it would be very hard to make a 3.9 that fast
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IntenseDak39
GenIII
3/12/2002
02:34:54
| RE: 3.9 v6
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cobras? where... i need a snack!
just messing with ya, but i can take down stock cobras!
IntenseDak39
"How's my driving?........Race me and find out!"
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henry hughes
Dodge Dakota
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3/12/2002
13:30:45
| RE: 3.9 v6
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I have a 1987 dodge dakota, 3.9 auto, 2wheel drive. Has 2bbl carb., mech. fuel pump. Been haveing problem with fuel geeting into the oil real bad!!! Put $5.00 in gas, went 13 miles and fuel light came on, checkes oil and it was full of gas. Drained oil, filled 5gal. pale. i put new fuel pump on several month ago. can someone tell me whats wrong, before i dish out $$$$$. TIA henry
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Joe E.
Dodge Dakota
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3/12/2002
13:55:10
| RE: 3.9 v6
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What HP do you think I run?
1990 2wd V6. 125 hp 3.9L + Mods: K&N cone intake, edelbrock shorty headers, no cat, flowmaster dual 2.5 in exhaust, Jacobs Omni Mag ignition system, 8.5mm Jacobs wires, Jacobs perf. coil, autolite 3923s at 0.45, removed all emissions system, 180 deg T-Stat.
Thats it I think. I have come up with about 170-175 Hp as a guesstimate. No dyno or anything. I am planning to buy a Jet II chip soon. Then what HP? Thanks for your help and guesses...
Joe E.
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FazDak
GenII
3/12/2002
14:38:53
|  RE: 3.9 v6
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I hate to burst your bubble but everything you have done probably got it back to factory HP.
When they rated your engine at the factory they had perfect conditions and had the engine on a dyno not in a truck. so think about it if your engine was brand new with (and I may be wrong about this part) no accessories on it no air cleaner no full exaust and they got 125, then after they put it in your truck you lost ALOT right there.
Thats why if you ever see stock rides dyno'd at the rear wheels they have ALOT less HP than advertised
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IntenseDak39
GenIII
3/12/2002
17:14:11
| RE: 3.9 v6
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fazdak...they only rated engines without accessories back in the 60s and 70s... now they do do a dyno with them...but that is correct about the perfect conditions... not every magnum is the same.
intense
"How's my driving?........Race me and find out!"
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FazDak
GenII
3/12/2002
19:46:54
| RE: 3.9 v6
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Thats why I said "I may be wrong about this part".
I think I was more or less trying to tell him he hasnt done any real power adders and he was being optimistic about his figures.
I would just like people to know that tune up parts dont really increse HP from a factory rating, all to often parts companys advertise power gains with tune up type parts and it makes people waste alot of money and time for a reason other than there original goal.
I didnt mean any harm, only tryin to inform these guys.
Sorry, Scott
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Joe E.
Dodge Dakota
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3/13/2002
01:43:40
| RE: 3.9 v6
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OOOOOOOOOOOOOOOOOOOOOOOKKKKKKKKKKKKKKKKKKKKK,
FastDak, so your saying that the unweighted down 3.9 has 125 HP. And after the hundreds of lbs. of body and after marketbars and guards, I have about as much Hp as my lawnmower! your the first person to ever tell me anything like that. Maybe your right, maybe your wrong, but to tell you the truth, I dont really care about #'s...
In reality, its all about the feeling of the truck. Before I did anything to my engine, it was very sluggish and weak. But now after the free'er breathing engine and better ignitions, it fells alot different. I can get up and haul ass pretty good. In all respects, that is what matters.
Thanks for the info though. By the way, have you "wasted" any cash on your truck FastDak?
Joe E.
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IntenseDak
Dodge Dakota
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3/13/2002
04:21:04
| RE: 3.9 v6
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Joe,
fazdak wasn't attacking you or anything. i think he was trying to say a 1990 V6 with a stock output of 125 isn't going to be pushing 125 in 2002 without a rebuild (maybe you did, we don't know, you didn't mention it). you have a good list of mods but some are only "tuning mods". the autolites might make your truck run a lot bet (i notice it in my truck) but i doubt that there really is a significant horsepower increase from the t-stat and plugs.
if you didn't care about numbers than why did you ask? i agree though... the butt dyno is the most accurate to the driver.
i think at most a good exhaust will give our trucks about 10 good horsepower and an intake about another 5-10. the ignition itself won't do much but with all the others it should. i just don't think all of that would bring in 50 horsepower... but hell it sure feels like it because i have a lot of those mods plus some.
intensedak39
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redcobra
Dodge Dakota
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3/13/2002
08:49:02
|  RE: 3.9 v6
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Hey IntenseDak;
You may take "GT's" with their 260 HP, but the bone stock 99, 00 Cobras have 320HP and turn the quarter in under 13.0.
Cheers,
ps: I lucked out, when I titled my dak, it turns out to be a 87 instead of an 88. No EFI. 2bbl and a distributor. Yes...... I can deal with that.
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FazDak
GenII
3/13/2002
09:34:11
| RE: 3.9 v6
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Sorry to get you all @ssed up Joe E. I really meant no harm, you did ask what we thought you had for HP.
Yes I have "wasted" some money on those type of parts but running NOS I had to have em as stock wouldnt do.
"IntenseDak" is this Greg? Did your membership run out or something or do we have an imposter?
Thanks for your defense but you really shouldnt use a name so close to a well respected member of DodgeDakots.com's.
Just for the record, I have NO problem with older Dak's, I have actually entertained the idea of buyin one the only thing I would do different then you guys is I would build with a hot carb'd engine not worry bout fuel injection, the reason is because carb'd engines are so much cheaper and eaiser to tune. Also I have a 340 Challenger that has a Holley 650 dbl pumper an it and its fast as hell!!
Scott
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IntenseDak39
GenIII
3/13/2002
11:14:23
| RE: 3.9 v6
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under 13.....no
do i look like i was born yesterday?
the saleen superchargered cobra barely runs under 13...i have seen both of them run... sorry nice try
and i was talking about real life race experiences... not by something you read in that $3.50 magazine.
intensedak39
"How's my driving?........Race me and find out!"
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Joe E.
Dodge Dakota
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3/13/2002
12:36:24
| RE: 3.9 v6
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Hold on there guys, I am cool and stuff. Not mad or anything. I am just trying to figure this stuf out.
Yeah, I realize things like the T-stat and plugs wont make a HP diference but they will help accomidiate the other more expensive mods. But I dont agree with your statement about mods not increasing HP. If these mods dont increase HP, then how exactly do they make my Dak faster?
When all is said and done, I am not looking for top speeds, I am an off roader with the whole lift seen. But power is still important. Thanks for your help.
A relaxed and cool headed, Joe E.
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Tim Althoff
Dodge Dakota
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3/13/2002
13:31:32
| RE: 3.9 v6
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Message:
ok i'm going to chime in here...break up the same people talking :) THIS IS NOT A FLAME!
what they are trying to say is that your truck was rated 125 12 years ago. that is measured at the crank not the rear wheels...just as a rough guess i would multiply your 125hp figure to 22% for drive train loss (pussing your butt). so your at about 97hp's. now when you are adding your mods...it's to this number. When he said that you are not increasing your hp's that's b/c you are adding to the 97. just a rough guess but you would be around 115-130 hp's at the rear wheels. so you have gotten it back to what you thought you had at the begining. do you understand?
go to bernd's webpage to download his calculators (put your truck weight in and then your 1/4 mile ET and MPH and it will give you an idea about how many hp's you have...
now these are rough figures but you can get the idea...
Tim Althoff
99 RC Dak w/ V6 5-speed
http://go.to/yllwdkta
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FazDak
GenII
3/13/2002
16:48:16
| RE: 3.9 v6
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Message:
Thanks bunches Tim!!!
I will admit I come off a bit strong at times.
You put that in very politically correct manner.
I will say one more time, I really get agravated at these claims for HP gain on mere tune up items and alot of companys are doin that now.
Do like I do, put a part on go to the track and see if it makes any gain.
I wont lie, all the "tune up" type parts havent gottn me even close to a decent 1/8th time, thats when its time for "power adders"!! and now I've got em, cant wait fo rthe local track to open.
Again, very sorry, Scott
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redcobravert
Dodge Dakota
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3/13/2002
19:51:28
| RE: 3.9 v6
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to very IntenseDak;
Where do you live? Would you like to see my timing slips. I don't read it in mags. I own it.
Let's go for pink slips:)
99 Red Cobra Convertible. 12.92@ Mason Dixon Dragway near Hagerstown MD. 10/13/00 7:12PM 68degF
K&N, Bassani, 3.73 rear, underdrives,275/40/17 Firestone Firehawks.
No Vortech yet, but soon as the warranty runs out.
ps: I still can't seem to haul much in the Cobra. So the Dakota wins that one hands down. And, if I leave the asphalt, I get stuck in the mud. Different Cars for different purposes.
pps: but hey, when you buy a Cobra they send you a leather jacket with the SVT logo embossed and the serial number of your car stiched inside.
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redcobravert
Dodge Dakota
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3/13/2002
19:56:05
| RE: 3.9 v6
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To IntenseDak39;
A further postscript;
I bet my car payment is a lot bigger than yours:)
RedCobraVert
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Joe E.
Dodge Dakota
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3/13/2002
22:05:35
| RE: 3.9 v6
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Hi yall, just cutten in here one more time before I hit the sack. I understand the whole 12 year old thing and enigines, like everything else tend to sag after a few years. I am alittle optimistic obviously but the 125 Hp rating was a solid number to work from. But your right, not very likely its still like that now. Since there seems to be some mechanical knowledge here right now, what mods would be the best way to get some HP increases? Cams, intakes, what? Shoot me some more info here, I promise I wont raise bloody hell again. Have a nice one guys.
Joe E.
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IntenseDak39
GenIII
3/13/2002
22:57:24
| RE: 3.9 v6
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i bet it is too,
but if you look at what i said, i said STOCK!!!!!not "K&N, Bassani, 3.73 rear, underdrives,275/40/17 Firestone Firehawks."
now if you payed as much attention to what i wrote as you pay for your stang you could of saved your fingers from typing.
i am not trying to flame or start a fight... just please read carefully.
intensedak39
"How's my driving?........Race me and find out!"
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BlackDakRacer
Dodge Dakota
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3/14/2002
02:30:20
| RE: 3.9 v6
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to redcobravert, i found a forum for ya: www.kissachevysass.com
~~Eric
Find a Ford forum, then spent your money on a REAL car!
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IntenseDak39
GenIII
3/14/2002
10:46:11
| RE: 3.9 v6
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hey Joe,
cams and head work are great ideas... little more expensive and hard work but the camshaft is probably the single biggest improvement you can make on a naturally aspirated engine. i did see if yours was pre-mag or not. Mopar has cams for pre-mag and KRC (i think) has cams for the magnum engines. get a good cam and some roller lifters and roller rockers and you would be looking probably towards a true 45-50 horseys. all you can really do to the heads is do a port and polish. but a go valve job would help... but we are talking money with that kind of stuff.
intensedak39
"How's my driving?........Race me and find out!"
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redcobravert
Dodge Dakota
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3/14/2002
21:24:13
| RE: 3.9 v6
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You boys have fun playing with your little trucks now. You obviously don't understand real cars.
Eric,
Did you hear about the Chevy owner who blew up a car? Burned his lips on the exhaust pipe!
Suck Ford Exhaust.
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Joe E.
Dodge Dakota
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3/14/2002
21:41:27
| RE: 3.9 v6
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Thanks Intense,
There is going to be a time in the near future when I either rebuild my 3.9L or find a newer Mag 318 donor. Just looking into options here. I have thought about finding a Dak with a mag 318 and taking my sweet time rebuilding it (rather having a shop do the real tech stuff) and installing it when I finished the engine. Thanks
Joe E.
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IntenseDak39
GenIII
3/15/2002
04:48:39
| RE: 3.9 v6
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no, i understand real cars...why do you think i didn't buy a rustang! Cobra's are nice but camaros are where it's at. My family has three F-bodies... and a lot faster than your cobra and a lot less expensive.
1979 Z28 runs consistent 7.5s in the 1/8th sorry no 1/4 around here. but that calculates to low 11s and it is street legal.
1996 Firebird Formula... 6 speed, 3.42 gears, morosa cold air kit, g. mass air flow, flowmaster exhaust, etc,etc, etc... never raced though...wanna be the first victom?
2000 Z28 naturally aspirated and it has beaten Z06s... need i say more? (and that's my mommies... he he he)
i live in fort worth... i have already embarrassed two 99 Z28s and a 99 Cobra convertible with an intake (not sure which kind) and a $900 Borla exhaust with my little bitty over weight six banger truck.
you know what, i have never got into an arguement like this but i am sick and tired of ford owners thinking it would be cute to get on a dodge forum and talk sh!t... if you wanna come down here and race...cool, if not... go away and pay your car payment.. only $29,728 left... enjoy!
intense
"How's my driving?........Race me and find out!"
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FazDak
GenII
3/15/2002
14:05:33
| RE: 3.9 v6
IP: Logged
Message:
Nice words Intense, your smokin!!
No I dont understand real cars, just bring your Mustwang to VA and I'll show you what an imaginary Challenger can do.
Dont forget to bring that pretty little pink purse you have with money in it also.
Sincerly, Scott
PS, Are we safe in assuming that you've pissed everybody on coBRA's.com off with your mouth and thats why you've shown up here?
Please leave us real auto enthusiasts alone and play with yourself somewhere else.
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IntenseDak39
GenIII
3/15/2002
14:22:33
| RE: 3.9 v6
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*clap clap clap clap clap clap*
well spoken FazDak...
... i wanna see your challenger
intense
"How's my driving?........Race me and find out!"
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FazDak
GenII
3/15/2002
17:35:33
| RE: 3.9 v6
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All I have is a pict of it from quite a few years ago, I'll pst it, she looked good then.
She's been under a cover for at least 3 years now, as a matter of fact I think the last time I drove it was when I got the Dak on the road.
Just before I put it under the cover I spent an hour on the side of the road begging a cop to just write me the reckless ticket but PLEASE dont tow my car.
Now you may understand why I put it under the cover.
Oh and if your wondering I was racing my cousins Mustang that I helped him build, it was a 5.0 GT with alum. TFS heads, 1.7 RR, TFS intake, custom mass air, fog light March ram air, 3500 stall Art Carr aod trans and 3.73's.
All that and I had 3 cars on him thats how he got away, he was blocking my rear view mirror so I couldnt see the cop and he turned off quick enough!! that suked.
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to henry
Dodge Dakota
JOIN HERE
3/17/2002
10:21:37
| RE: 3.9 v6
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Message:
henry hughes you have a hole in the diaphram of your block mounted fuel pump, the hole allows gas to leak to the wrong side of the pump and then it leaks into your crankcase through the hole that the pump actuator that runs off a small bump on the crackshaft. replace the pump and your fuel in crankcase problem will stop.
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