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shatto
Dodge Dakota
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8/29/2006
21:24:03
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 Subject: DYNO!
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Message:
I'd like to see, or hear, the dynomometer report somebody did that also showed horsepower and torque at the RPM we usually drive at; in my case 2,000 RPM.
With that information would you not be able to calculate performance with larger diameter tires? ie. use larger tires at the same speed=better MPG?
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N56629
Dodge Dakota
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8/30/2006
06:37:09
| RE: DYNO!
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There is no connection between what you get on a dyno and MPG. Larger tires effectively lower your gear ratio. For the most part larger diameter tires will give you better gas mileage on the highway but it may reduce your mileage in city driving.
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Mopar318
GenII
8/30/2006
12:42:18
| RE: DYNO!
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I doubt you are going to find anyone with a dyno reading under 2,000 rpm. But my truck takes 13.5hp to continue at 60mph acording to the dyno chart.
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Kowalski
GenIII
8/30/2006
14:42:52
| RE: DYNO!
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Larger tires will also effectively raise your gear ratio; not lower it. Some of us with the 4.7 have actually found (contrary to popular wisdom) that going to a lower gear ratio has meant a gain in milage. This can depend at least as much on how efficient your motor is a certain rpm as how much power it makes at that rpm.
Lead, follow, or get out of the way
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Hmmmmmmmm
Dodge Dakota
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8/30/2006
15:36:14
| RE: DYNO!
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"Larger tires will also effectively raise your gear ratio; not lower it."
I was referring to numerically.
"Some of us with the 4.7 have actually found (contrary to popular wisdom) that going to a lower gear ratio has meant a gain in milage."
The clarification is good because not all people drive in the city or on the highway. Different driving conditions dictate different ratios. There is no gearing that gives better mileage under all conditions.
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Fed
GenII
8/30/2006
23:32:53
|  RE: DYNO!
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Mopar318,
what did your truck turn out on the dyno?
1993 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, intake, lowered 5/5, rear anti-sway bar)
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Mopar318
GenII
8/31/2006
11:28:12
| RE: DYNO!
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I have only dynoed stock.
183hp and 242 TQ to the wheels.
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Fed
GenII
8/31/2006
18:06:25
| RE: DYNO!
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Message:
oh i see..
i would like to see what you have now!
1993 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, intake, lowered 5/5, rear anti-sway bar)
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Ky_man
Dodge Dakota
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9/01/2006
00:53:51
| RE: DYNO!
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Anyone know where you can get a dyno test in the San Diego area?
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Fed
GenII
9/01/2006
04:15:56
| RE: DYNO!
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yes i know exactly where you can get one
check out www.dynoperformance.com
they have dynoed almost every car out there...
the next "Dyno Day" is october 14th its like $40 for 2 runs
1993 Dakota CC 3.9 auto
(4.10 gears, LSD, exhaust, intake, lowered 5/5, rear anti-sway bar)
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Carson
Dodge Dakota
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9/02/2006
00:54:33
| RE: DYNO!
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ummm...a lil off topic but...whats the best gear ratio to go to with the 02 3.9 5spd to gain performance and hows that to install?
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mopar318
GenII
9/02/2006
13:10:15
| RE: DYNO!
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4.56 gears work well with the 3.9 5 speed. And if you have to ask how to install you wont be able to do it.
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ToddSails
Dodge Dakota
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9/10/2006
14:51:55
|  RE: DYNO!
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Message:
229 RWHP, 301 RW tq- in 4th gear (1:1)
01, 4.7, 5 speed manual, 3.55's
HO cams and intake, home brew air
no belt clutch fan, no third cat
ported stock 68 mmTB
Super chips tuner
My engine now has over 105,000 miles, and would still pull these #'s, It had 80,000 when I dynoed.
ToddSails aka TexasTodd
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