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3.9??
Dodge Dakota
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1/31/2012
18:12:11
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 Subject: larry j&J auto
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Larry how can i contact you other than on here i was
looking at older post and i found a email that didnt
work when i tried it is there a new one or does
anyone else know how i can reach him outside of
here???
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daddio
Dodge Dakota
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1/31/2012
20:39:47
| RE: larry j&J auto
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Larry hasn't been in these forums for years. Maybe try the "members only" area.
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3.9
Dodge Dakota
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1/31/2012
20:55:42
| RE: larry j&J auto
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well hell...... you think you could help me a have
seen alot of your input and advice on here as well
is there another way to contact you
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daddio
Dodge Dakota
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2/01/2012
13:12:39
| RE: larry j&J auto
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Post your query. I'll see what I can do.
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3.9
Dodge Dakota
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2/01/2012
17:50:52
| building a 3.9
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my questions are based on reading on here a lot
and wondering why not many people talk about
boring the 3.9 or stroking it? head work, cams and
lifters with all the other stuff, not just alone,
i understand you could go turbo with a small psi
and do some good gains but.. i wanna stay NA...
why havent i heard any about it? is it bad for
them do they just not like it.. i want to stick
with the 3.9 and build it not a 318 or 360.. oh
and thank you for helping with what ever you can.
and yes i do know i wont be looking at 100000000
hp or even 300 for that matter but a do think
these motors are severely under rated for their
potential.. and my goal which would be inportant
to know is really like a hot street truck. stop
light race or maybe to like 80-90mph nothing more
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daddio
Dodge Dakota
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2/01/2012
20:12:41
| RE: larry j&J auto
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Once upon a time, there were stroker kits avaiable for the 3.9. If you can find one you better buy it. Otherwise, you could do all the other rodder tricks, head work, cam, etc. If I were doing it I would go with a carb, hi lift cam, head work and squeeze as much compression as you could out of it. Of course you could go with one of those unviversal turbo kits but on a stock 3.9 I would limit boost to about 5 psi. Then find an aftermarket fuel management system/ PCM for boost, fuel and timing control. With boost detonation is a killer and these engines are prone to detonation. Alky injection can help with that also. Do some searching and reading. lots and lots. You could probably get a streetable 275 to 300 hp.
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3.9
Dodge Dakota
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2/01/2012
21:26:03
| RE: larry j&J auto
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thanks daddio and what are the rodder tricks your
reffering to. and tell me what you think of my
ideas for it
fastman tb 46mm
fiveomotorsports injectors
jba headers
1.7 rockers
14inch hi hat intake
msd/accel ignition
3in exhaust high flow cat flow 40 dumped
e fans, no clutch fan
when it gets retired
bore it 30 over
shaved heads
maybe a cam but would that interfere with the
rockers
modded ram air hood
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daddio
Dodge Dakota
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2/02/2012
10:58:00
| RE: larry j&J auto
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I wouldn't put a full 3" exhaust. That might be a little too large. If you can find them, '92 to '93 exhaust manifolds flow better than any other year. Then a 3" y-pipe form there to a hi flow cat, 2.5" back from there to a free flowing muffler of your choice. Ohter than that, you've got a good list. You can also think about gears and or a locking diff.
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3.9
Dodge Dakota
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2/02/2012
12:19:16
| RE: larry j&J auto
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by full i mean its stock from the y pipe up but the
cat and pipe back is 3 in already..sorry i should
have clarified. but it moved my powerband up which
is good for the time being and when i get headers it
will be changed to 2 1/2
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daddio
Dodge Dakota
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2/02/2012
13:15:43
| RE: larry j&J auto
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Message:
Torque is what you wnat to get that heavy beast moving. Describe your truck, year, model, etc.
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3.9
Dodge Dakota
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2/02/2012
22:12:33
| RE: larry j&J auto
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94 dakota slt extended cab 2wd... already have
decent acceleration and when it hits 2500 it starts
to really pull. i heard that the throttle body will
add some on the low end back... is this true? i
have the 3 in on it with ignition upgrade with the
high hat air cleaner.. injectors are waiting and
throttle body is on order ill put them in together
and 235 75 15 tires but thats all for what i have
and whats done to it.
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daddio
Dodge Dakota
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2/02/2012
23:25:41
| RE: larry j&J auto
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I've got an '00 QC 2wd 3.9, 5 spd w/ 235/75/15's. I've got a V8 TB, underdrive crank pulley, CPS mod and ditched the clutch fan. I get up to 24MPG hwy and about 18-19 city. With 150k on it and its running great.
I don't know if that Fastman TB will return the low end or not. Do you have an auto trans? Check your gear ratio. Try looking on the glovebox lid. If you have the 3.21:1 ratio you would benefit greatly going to something like 3.92:1 or 4.10:1
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3.9
Dodge Dakota
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2/03/2012
17:17:05
| RE: larry j&J auto
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im lookin at stock rear end i think the guy before
me was an elderly truck driver so it was babied. or
a long break in lol but im not sure i can only hit
90 maybe 95 and its an auto, still have clutch fan
need to take it off and run electrics. dont know the
cps mod.. can i do it and how is it done also the
iat mod can i do either of them on my older 94
truck?
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daddio
Dodge Dakota
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2/03/2012
19:07:32
| RE: larry j&J auto
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My truck did not like the IAT mod. It just used more fuel with no gains. But, one thing I've learned, every one of these trucks has a different personality and will not react the same. The CPS mod is easy. Search the site you'll find it. As for the gear ratio, check the inside of the glovebox lid it should have the ratio that the truck was built with.
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3.9
Dodge Dakota
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2/05/2012
00:04:51
| RE: larry j&J auto
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I looked a while today and could find anything
explaining how to do it. is that a crank or cam pos
sen? and as for the gears i checked the box and the
rear gear housing and couldnt find any numbers
dictating what ratio it what. its kinda buggin me
now. my truck doesnt want me to know anything lol
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3.9
Dodge Dakota
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2/05/2012
22:10:10
| RE: larry j&J auto
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i found it on google but the thing is noone says how
far to adjust it, and its toward to oil filter
correct?
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daddio
Dodge Dakota
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2/06/2012
20:11:37
| RE: larry j&J auto
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Crank Position Sensor = CPS. Look behind the passenger side head at the top of the bellhousing. If you have a manual trans the sensor probably has a plastic housing as mine does. Unplug the connector to it and remove it. Then elongate the moounting holes on the sensor so you can slide towards the starter. You won't get much. Maybe a 1/4" or so of movement. I think worth about 2 or 3 degrees more of timing.
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3.9
Dodge Dakota
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2/06/2012
20:34:18
| RE: larry j&J auto
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ok thanks i only saw people saying go as far as it
would go lol
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