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jasonC
Dodge Dakota
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7/03/2007
19:20:24
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 Subject: 318 dyno run
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I ran my truck on a wheel dyno yesterday.
Its a 99 5.2L dakota.It has shorty gibson headers,3" pipe all the way to the 40 series muffler,were it splits into duel 2.5" tail pipes.No cat.And it was power programed for 87 octane with the hypertech programmer.The truck has 92k on it.
it made 173hp and 230lbft of torque.
A little disapointed.
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gen1dak
Dodge Dakota
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7/03/2007
21:36:55
|  RE: 318 dyno run
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All that exhaust isn't much good if the engine can't inhale better (cam), so power increases will not be that dramatic. Also, consider that the stock tranny is sucking up a nice chunk of power as well. A good aftermarket unit, or a rebuild with better-than-stock parts will make a surprising improvement in rear wheel HP.
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gen1dak
Dodge Dakota
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7/03/2007
21:39:12
| RE: 318 dyno run
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Just imagine how piggish they were in the late 80's when rear wheel HP was more like a whopping 125. Yawn.
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brianj
Dodge Dakota
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7/04/2007
09:15:43
| RE: 318 dyno run
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hey people get the impression that if you do an intake and exhaust you get like 50 hp for some reason. if you want real gains you gotta do like gen1dak said, get a cam, heads etc. actually change parts from the engine.
when i was in school we would dyno cars with exhaust, intake ect. and i was very supprised of the little gains if any, these vehicles made. some vehicles would actually loose 1-2 tq. but when we changed just a cam. oh man we got like 42 more horse and 45 more torque. no kidding, now thats worth it to me. if your up to the work in changing the cam, or actual engine parts. now youll feel somethin.
or you can just get it over with and spray the damn thing. lol
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2002RT
Dodge Dakota
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7/04/2007
14:30:17
| RE: 318 dyno run
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dont fell bad man my RT made 257hp at the wheels with M1,1.7rr,k&n intake,mopar headers, hypertech.holley 52mmtb. i was expecting atleast 285 but owell.
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gen1dak
Dodge Dakota
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7/04/2007
16:13:53
| RE: 318 dyno run
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Now that's a perfect example. Everyone goes for those 1.7:1 rockers. While they do improve over the stock cam with 1.6:1 rockers, they aren't nearly as effective as swapping cams. With a good cam swap, you'd have easily hit 285HP. With the 1.7 rockers on the stock 5.9 cam (.410" lift - very mild duration numbers) you get an increase to .435" gross lift, or basically the same as the 5.2 Magnum cam.....and it's a lot cheaper. You have all that capacity, but your cam specs, even with the 1.7's, are still crap. Yes, there are some minor improvements from reduced friction of roller rockers, but the majority of the power that is realized comes from increased lift. The higher ratio also, very slightly, increases the duration numbers, but you'd see much better numbers with stock 1.6 rockers and a really good aftermarket cam. And you can still add roller rockers later if you want.
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GREG K
Dodge Dakota
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7/06/2007
17:27:57
| RE: 318 dyno run
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2002 rt if you read up on the rt you will see that in stock form the rt's loose 97hp through the drivetrain. they said the dakota r/t put out 153 to the wheels.
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2002RT
Dodge Dakota
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7/06/2007
20:16:59
| RE: 318 dyno run
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ya i know the 46re are power suckers. woulda been nice if they woulda made a 5speed instead
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TexasTodd
Dodge Dakota
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7/07/2007
01:25:46
| RE: 318 dyno run
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Jason,
My 4.7, with only measley HO cams, put out 218RWHP at the rear wheels.
227RWHP and 300RWTQ, with just adding the Super chips and premium, a whooping 8 HP/TQ increase. It is a manual however.
Let me get this straight, you have HEADERS, and then into a Y pipe back to a single exhaust, but ooh, splits again after the muffler? With headers?
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2002RT
Dodge Dakota
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7/07/2007
21:05:10
| RE: 318 dyno run
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that 257hp pushed me into 13.9@99mph on a very cool night
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jasonC
Dodge Dakota
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7/08/2007
10:50:52
| RE: 318 dyno run
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TexasTodd
yea.I had the exhaust done before I knew I was getting headers.If I had to do it all over I would of ran true duals.
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jasonC
Dodge Dakota
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7/10/2007
13:41:32
| RE: 318 dyno run
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I have seen dynos for stock rt's.190HP at rear tires
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brianj
Dodge Dakota
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7/10/2007
14:16:53
| RE: 318 dyno run
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can anybody find a shift kit for those power sucking trans? i can only find one on e bay for the 4.7 not the 5.2s and how much?
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2002RT
Dodge Dakota
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7/10/2007
18:30:23
| RE: 318 dyno run
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stock i put down 210hp and 276tq at the wheels
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gen1dak
Dodge Dakota
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7/11/2007
00:43:14
| RE: 318 dyno run
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Search for tranny kits, not shift kits for engines.
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intensedak39
*GenIII*
7/11/2007
23:04:02
| RE: 318 dyno run
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dont worry about what your numbers are compared to other
peoples.. just get a baseline and you can go from there for
improvements with different parts.
my 2000 durango 5.2 V8 made 181whp 263wtq... with just a 40
series flowmaster in place of the stock muffler
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TexasTodd
Dodge Dakota
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7/19/2007
02:53:05
| RE: 318 dyno run
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2002RT,
My Stock was 218RWHP and 292RWTQ, (with the stock DC HO cams)
with 1.2 LESS liters, on my 4.7.
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