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Pittdawg
Dodge Dakota
JOIN HERE
2/10/2004
01:30:44
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 Subject: Calling all '03 & up 4.7's dyno time
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Message:
So it has been established '03's came with a revised h.o. intake, 04's another slight revision. I wanna seet if these revisions added power or just smooth things out a bit. I beleive stock auto 4.7's 2000-2002 put out around 180-190rwhp. Let's see what y'all pull.
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Kowalski
Dodge Dakota
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2/10/2004
15:47:15
|  RE: Calling all '03 & up 4.7's dyno time
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Has it actually been established that the '03 has a revised HO intake ? I heard that the regular 4.7 has the same intake as the HO and everyone seems to have jumped to that conclusion; it could also be that the HO motor is now being built with a regular intake. Does anyone really know ?
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Pittdawg
Dodge Dakota
JOIN HERE
2/10/2004
18:27:53
|  RE: Calling all '03 & up 4.7's dyno time
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Kowalski-
Starting in '03 both the h.o. and standard 4.7 have the same intake manifold. This manifold appears to be a revised version of the an '02 h.o. manifold. In addition, the 2003 version has been further revised in 2004. Only a dc engineer could tell you exactly what those revisions adressed, but from my research I believe they accomplished two things:
1) included both short and long runners to
improve the high-end horsepower of the
standard pre-'03 intake manifold and
simultaneously keep the desirable low-end
torque which the '02 h.o. manifold eliminated
2) reduce pedal vibration (which is fairly
common among the 4.7's when an aftermarket tb
or cai is installed)
The following link explains it the best.
http://www.wjjeeps.com/ho_engine.htm
Finally, follow the link by the picture of the 02 and 04 manifolds where it says "WJ Manifolds"
(http://www.wjjeeps. com/manifold.htm).
This link actually depicts the physical differences. It appears the newer manifolds utilize long and short runners whereas the older manfiolds only utilized one type of runner (short ones for the h.o. and long ones for the standard, or is it vice versa i forget). Very interesting stuff though, I am really interested in purchasing the 04 manifold. Any dc techs out here that can tell me whether my analysis is correct, I sure think so.
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TexasTodd
Dodge Dakota
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2/10/2004
22:00:50
| RE: Calling all '03 & up 4.7's dyno time
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HOw can you have two length runners, to the cylinders, some are short ,and some are long?
Could The different part #, really be the placemnet of the IAT sensor, manifold vs. air intake?
?
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Pittdawg
Dodge Dakota
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2/10/2004
22:13:09
| RE: Calling all '03 & up 4.7's dyno time
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Todd
Look at the 02 vs. the 03-04, on the 02 all the runners (i think thats what those center tubes are) are the exact same length and curve, on the 03-04 the runners tradeoff every other one is long while the next one is shorter. See what I'm sayin?
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Pittdawg
Dodge Dakota
JOIN HERE
2/10/2004
22:17:18
| RE: Calling all '03 & up 4.7's dyno time
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Message:
sorry i meant to do this
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Paul
Dodge Dakota
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2/10/2004
22:42:36
| RE: Calling all '03 & up 4.7's dyno time
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It looks like all the runners on the 03 are the same size ( relative to each other ) but they are offset. They are'nt different sizes.
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IdahoRT
Dodge Dakota
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2/10/2004
23:48:17
| RE: Calling all '03 & up 4.7's dyno time
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Here's my before and after turbo dyno. Before is bone stock as in zero mods. Factory air cleaner still in place. After turbo dyno is with 6psi intercooled.
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IdahoRT
Dodge Dakota
JOIN HERE
2/10/2004
23:51:08
| RE: Calling all '03 & up 4.7's dyno time
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Oh yeah, details.
2003 2wd 4.7 5-speed, 3.95 LSD.
Basline dyno 197HP/250TQ
Post turbo dyno 305HP/395TQ
Dynojet dyno numbers, SAE corrected.
Post turbo dyno is still with factory exhaust including factory cat, muffler, and pipes from downpipe back.
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Pittdawg
Dodge Dakota
JOIN HERE
2/11/2004
00:35:05
| RE: Calling all '03 & up 4.7's dyno time
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Message:
Hmmm...doesnt seem like the new intake makes as much as a difference as i thought
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Pittdawg
Dodge Dakota
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2/11/2004
00:40:59
| RE: Calling all '03 & up 4.7's dyno time
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P.S. that is Notchlx's stock dyno, 2000 4.7 manual w/ 3:92 gears. After examining the two graphs, the power doesnt seem to have gone up (hence no change in dodge advertisements) however, even taking into account the different increments it does seem to have been broadened and flattened
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01Motorsport
Dodge Dakota
JOIN HERE
2/12/2004
11:54:47
|  RE: Calling all '03 & up 4.7's dyno time
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Nice post, guys!
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deerridge
Dodge Dakota
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2/13/2004
11:37:19
|  RE: Calling all '03 & up 4.7's dyno time
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Don't you just hate it when people present stuff will real evidence.
Thanks guys, truth is good!!
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Demon Dakota
DakotaEnthusiast
2/13/2004
14:32:50
| RE: Calling all '03 & up 4.7's dyno time
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Message:
They probably staggered the intake runners in order to stop the shock wave in the plenum (which was part of the pedal vibration). That would be my guess. And no, they don't have two different runner lengths. There are 8 runners, one for each cylinder. If there were two runner lengths for each cylinder, the manifold would have 16 total runners flowing to the heads. Also, in order to have 2 runner lengths, you'd need to have a computer or vaccum controlled changeover system (more commonly known as a variable intake), and even then, it wouldn't do much good without variable cams and cam controllers.
True Dual exhaust and removed third cat
HO Cams & HO Intake
FASTMAN 70mm TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
Custom tranny VB Mod
Demon long tube headers
Ported/polished heads w/ 1.92" Intake/1.60" Exhaust Valves
One dead stock LSD unit (POS...)
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TexasTodd
Dodge Dakota
JOIN HERE
2/13/2004
14:47:32
| RE: Calling all '03 & up 4.7's dyno time
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Message:
Demon,
That's what I was saying.
Idaho R/T, (R/T?, you drive a 4.7?),
anyway,
LOOK AT THAT STOCK GRAPH!!!
LOOK HOW FLAT THAT TORQUE CURVE IS!!!!!!!!!!!
THAT LOOKS LIKE OVER 90% OF THE MAX TORQUE, AT 2500!!
Thw s/c sure moves things over, and UP!
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IdahoRT
Dodge Dakota
JOIN HERE
2/13/2004
16:13:39
| RE: Calling all '03 & up 4.7's dyno time
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Message:
Texas Todd:
(I have a 03 turbo 4.7 in addition to my 00 R/T).
Anyway, on the dyno chart, don't compare numbers below 3500rpms. Baseline dyno was shifted into 4th by 2400 rpms, different driver (me) on the turbo dyno run. Shifted easy 3rd to 4th at about 2900, then hit the gas. You can see the turbo spool up, hence the quick ramp up to max TQ, however I shifted way to late obviously; I do get full boost, 6psi in this case, around 25-2700 rpms. Next time I dyno, I'll spool it up in 3rd and shift much earlier. See this link for a dyno video and you can see how easy I was in shifting into 4th:
5MB Dyno
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donnybb
Dodge Dakota
JOIN HERE
2/13/2004
16:32:47
| RE: Calling all '03 & up 4.7's dyno time
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Hey IdahoR/T, are you the guy Idaho Speed Center was telling me about. I went in there to get a price for a gear swap on my Rancho lifted 4.7 5-speed, and told me they were developing a turbo kit for the 4.7, and a local guy already had one of their kits. Got me dreaming of the money tree I would need.
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IdahoRT
Dodge Dakota
JOIN HERE
2/13/2004
22:01:34
| RE: Calling all '03 & up 4.7's dyno time
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Message:
donnybb,
Yes, that's me, I'm the prototype. I'll probably be up there tomorrow hooking a few things up if you want to stop by and check it out. After lunch will be the best time to catch me.
Jason
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donnybb
Dodge Dakota
JOIN HERE
2/13/2004
23:19:38
| RE: Calling all '03 & up 4.7's dyno time
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Message:
Sweet!!! I will be there, thanks for the reply
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jr
Dodge Dakota
JOIN HERE
12/23/2012
03:08:51
| RE: Calling all '03 & up 4.7's dyno time
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Message:
I need a little in fo from some one that has a turbo on a 4.7
Dakota. Want to get one but don't no what all I need other
then a install kit. If you can call me 7603848169. My name is
Jr
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TrafficTicket
Dodge Dakota
JOIN HERE
12/24/2012
17:24:21
| RE: Calling all '03 & up 4.7's dyno time
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Message:
Turbo for what purpose. the State Police like guys like you.
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