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brett
Dodge Dakota
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11/01/2002
00:21:30
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 Subject: 5.9L R/T POWER
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What can i do that will work with the stock computer in the truck and still give me some HP??
as of now i have a K&N drop in and a dynomax race magnum muffler w/4in exhaust all the way back.
truck runs now 14.7 @ 89.97 mph
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brett
Dodge Dakota
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11/01/2002
00:22:08
|  RE: 5.9L R/T POWER
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by the way its an 2001.
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KotaRT13
Dodge Dakota
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11/01/2002
02:00:46
|  RE: 5.9L R/T POWER
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m1, ported tb... the list is really endless, it really matters on how much cash you are willing to spend, and how far you are willing to go...
ill be happy to explain further...
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brett
Dodge Dakota
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11/01/2002
08:32:22
|  RE: 5.9L R/T POWER
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i heard the computer was screwey on the 2001 and up models though. I have heard that some things will actually take away HP with the new comp???
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HSKR
Dodge Dakota
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11/01/2002
13:51:12
| RE: 5.9L R/T POWER
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Ditch the stock airbox and get the K&N GenII air intake. ported TB, Mopar 2bbl M1. You can, but not legally, ditch the cats, and get some older Mopar headers and a Cat box to override rear O2s.
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03graphrt
Dodge Dakota
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11/01/2002
17:41:49
| RE: 5.9L R/T POWER
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hey brett u got a 14.7 basically stock with just a filter and muffler???u are a reg cab right??thats a pretty damn good time for a basicaly stock r/t.
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Hersbird
Dodge Dakota
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11/01/2002
22:26:41
| RE: 5.9L R/T POWER
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Some pure stock R/T's run 14.7's, quite a few RC's and even the rare CC or two. I don't think many mods recommended on this board are going to lose Hp on any Dakota. There is nothing "screwey" with the 2001 PCM that is not there on all the other years, but Mopar doesn't make an aftermarket PCM for the 2001 or up Dakotas. There are a few companies that do custom flashes and from what I gather they are every bit as good as the mopar one, just they cost twice as much!
Tghe 4" exhaust is something I haven't heard much of before, is it 4" just behind the cat or did you ditch the cat? If you still have the stock cats on there dropping them would remove a big bottleneck in a 4" exhaust! The Mopar Performance (AKA Positive Performance) headers would help make use of those big tubes as well. Then you need to get a bigger TB so the goes in, matches the goes outs.
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Brett
Dodge Dakota
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11/02/2002
02:12:44
|  RE: 5.9L R/T POWER
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No, its actually a Ext Cab R/T believe it or not. I was as shocked as you were. I just have 4in exhaust comming after the muffler. Its 2 1/2 stock tubeing form the muffler forward. Could you give me the website or the phone numbers to the companies that you say can flash the stock chip, and some web sites where i could buy some of this stuff? I was thinking summit but all i found there was a 4bbl M1 intake. What is the diffrence between the 4bbl and the 2bbl? I have heard that the 360 magnum motors require quite a bit of backpressure to be at optimum horsepower if i removed the cats wouldnt that make the engine put out less HP and TRQ? Anyways sorry for all the questions but i figure im going to do this once and i really would like to make sure that its right before i do it. Thanks, Brett
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afi360
R/T
11/02/2002
16:13:14
| RE: 5.9L R/T POWER
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simply explained, a 4bbl intake/tb combo is for higher-revving engines (on dakotas anyway)
stick with the 2bbl, i was going to order the summit 4bbl due to the price....but EVERYONE on here has said to get the 2bbl.
my 2cents
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Hersbird
Dodge Dakota
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11/02/2002
22:18:05
| RE: 5.9L R/T POWER
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B&G Chrysler has the best flash for 2001 or newer R/T's. Summit should sell both the 2bbl and 4bbl M1's but you can find better prices. www.southeastrt.com has a great rep and great prices, although the website leaves something to be desired (actually right now it looks like they are trying to upgrade it.) www.manciniracing.com supposedly will match other prices and they do have a good website for all the Mopar Performance stuff (they are the original Direction Connection dealer which later was renamed Mopar Performance.) The webboard at www.dakotart.com has lots more R/Ters doing many different mods and much more information specific to R/Ts. I don't think too little backpressure is a problem with the 5.9. I have heard some 4.7 owners think they have a torque loss with HP exhaust systems but nothing is ever confirmned on the dyno. It's probably just an increase in HP no gain in torque which means the torque peak is just moved to a higher RPM. You shouldn't feel any "seat of the pants" gain in that case, just that it pulls the same as it did before but for a longer period of time (thus more acceleration!) It's almost impossible to actually reduce torque while increasing HP unless you are dealing with a huge powerband change (maybe a completely different cam grind.)
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AJ
Dodge Dakota
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12/30/2002
14:43:17
| RE: 5.9L R/T POWER
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Ok folks, I just got a 5.9 Quad 4X4 and would like to know exactly why it is claimed to be de-tuned compared to the R/T?? Why is it rated with less HP and Torque?? Thanks in advance and if you could point me in the right direction for the upgrades, I would appreciate it.
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Anthony G
Dodge Dakota
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12/30/2002
17:09:31
| RE: 5.9L R/T POWER
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Is this 14.7@89 a G-tech thing or a real 1/4 track? You would need an awsome 60' time to get 14.7 at only 89mph trap speed. You need something like 93 or higher.
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Hersbird
Dodge Dakota
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12/30/2002
23:24:42
| RE: 5.9L R/T POWER
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AJ, I'd say there are two reasons for the different ratings. One is the R/T has a better exhaust, and second the R/T probably has a little hotter PCM. Funny thought the Durango R/T has even a hotter stock PCM (requires premimum) yet still has the same rating as the R/T. The Jeep 5.9 limited also had the same rating even though it didn't have a very heavy, power robbing clutch fan, and a premimum burning PCM, although the Jeep's tight 4x4 exhaust was probably more restrictive then the Dakota's. A reflashed PCM and a cat back on your quad cab will make more power then any of the aboved mentioned 245 hp 5.9's.
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AJ
Dodge Dakota
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12/31/2002
02:30:58
| RE: 5.9L R/T POWER
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Thanks for the info Hersbird. That makes sense. Another question though, what is a good size for the cat back system... I have read about quite a few sizes - 2.5" to 4". When I do mods, it won't be a whole lot and it won't be untill I break it in good. Speaking of which, I was thinking I should wait about 10k miles or so...what do you all suggest on that?
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texaslawdawg
Dodge Dakota
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12/31/2002
05:27:01
| RE: 5.9L R/T POWER
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Ive got to jump in here on the BG custom flash. I just got my PCM back from them about 2 weeks ago and I cant tell any power difference at all. He told me the shift points would be raised to 5100, but it shifts at exactly 4900...it shifted at 4800 stock !! $550 for 100 rpm shift differnce is a little too expensive. I know other say it wonderful, but either mine is a bad apple or the diffence is very slight. I may have just got my hopes set too high thinking it was gonna change the truck completely.
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POWER HUNGRY
Dodge Dakota
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1/01/2003
16:20:53
| RE: 5.9L R/T POWER
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I think it would be better to get the Hypertech 2001 Dodge trucks and SUVs with 5.2 and 5.9 litre engines.-HYP50006 $349.95 http://www.manciniracing.com/
As for the exhaust it woulud be better to start with the intake side,RR or cam then headers and cat-back. If you go in that order a 3 inch complete exhaust would be your best bet. For aftermarket single exhaust a good rule of thumb is 1(from dynomax site)-1.1 times the size is the hp rating. I use the 1.1# when choosing a size for a street engine so you don't go too big and lose low-end TQ.
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smokinslvrRT
Dodge Dakota
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1/01/2003
23:25:13
|  RE: 5.9L R/T POWER
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i have a 2001 5.9r/t sc completely stock i ran 15.2 @88.9mph at the track. I custom fit a cold air intake. its for a honda accord you just cut one end shorter by 2 inches fits perfectly behind the headlight. i also got taylor race wires and bosch platnium 4 plugs. it definitely a big diffrence. i havent gone to the track to run it with the new mods. If you drop the tire pressure to 20psi and take off the spare tire and tailgate you will drop your 1/4 mi. time at least 1/2 a sec.
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Shane K
Dodge Dakota
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1/02/2003
19:32:30
| RE: 5.9L R/T POWER
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I would suggest a power chip that would some times give you up to 50 hp. I have a new holley 670cfm throttle body on my truck and it helps alot.
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Hersbird
Dodge Dakota
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1/03/2003
00:10:14
| RE: 5.9L R/T POWER
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Personlly I think the MBRP is the best cat back, just the regular 3 inch single side exit. But it really needs the rest of the exhaust like the headers and a better cat (or no cat) to realize full exhaust gains. Then there is the throttle body and the intake (both air tube and manifold) that are needed so the 'goes in' matches the 'goes outs'.
Lawdog- I'm surprised of you result on the BG, that is the first negative I've heard. Maybe you should contact them and see if something can't be done. Also it's possible your TV cable is just way to loose not allowing the transmission to realize you are in a full throttle state. So it's shifting like it's at part throttle.
This is one big reason for getting a 2000 or eariler, so you can get a MP PCM, much less money and seems to work really well with all the standard bolt on stuff. My shift points are well into the 5000's and I get a good bark on the 1-2 shift that wasn't there before. Actually I put the stock computer back in for winter, the last thing I need is more power with an R/T in a Montana winter! Still another great advantage of having a completely separate MP PCM, switching takes only about 5 minutes.
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brett
Dodge Dakota
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1/03/2003
20:34:49
| RE: 5.9L R/T POWER
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it was a g-tech time. how much are those times off from times at the track.
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Jim
Dodge Dakota
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1/03/2003
21:18:32
| RE: 5.9L R/T POWER
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brett take off the 4in exhaust.Can you say over kill.
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afi360
*R/T*
1/05/2003
16:53:43
| RE: 5.9L R/T POWER
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g-tech says their variances are less than 1/2 second...my personal experience is that they are very hair-trigger, and tough to get dialed in..my advice would be use the g-tech at the track and see how off it really is.
anyway.
**in shadows growing wings**
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David Muske
Dodge Dakota
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2/22/2003
14:00:15
| RE: 5.9L R/T POWER
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I've used the G-Tech at the track and I found it to be a 1/10th of a second off but the trap speed is about 3 mph faster because it is an actual mph not an average like at the track.The setup of the G-Tech is the most important thing though, make sure it is centered in the windshield and pointing straight. Also make sure the the G-Tech is zeroed out before begining you run.
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Joe
Dodge Dakota
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2/22/2003
14:12:40
| RE: 5.9L R/T POWER
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Average at the track?? Huh?
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big_torque
Dodge Dakota
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2/23/2003
12:54:59
| RE: 5.9L R/T POWER
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There is a marker 66 ft before the finish line. Your speed is avgd. between the 2 markers.
yeah , 14.7 is a little quick for 89.9 mph.
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snakebit
Dodge Dakota
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2/23/2003
17:07:49
| RE: 5.9L R/T POWER
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i have a 2000 r/t w/ mopar headers and mbrp cat-back on the exhaust side. but what can i do w/ my cat? u cant just remove it right?? (o2 sensor) any suggestions would be appreciated
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