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Anthony G
Dodge Dakota
7/06/2001
17:48:45
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 Subject: Dyno Testing
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Message:
Looking for dyno test on Stock 3.9L 4.7L 5.2L & 5.9L
I wonder if Dodge rates there engines hi or low.
I'm getting my 2001 R/T Stock tested this Sat@ 9:30pm.
Will see what this puppy really has. Three runs!
After that I'll get some go FAST parts to see what a 360 can really do!
Other than doing 360's in a parking lot LOL! Now thats fun!
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Swampdak
Gen III
7/06/2001
18:44:58
| RE: Dyno Testing
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Message:
Anthony-The guys who really know the tech stuff can verify, but I think you will get rear wheel horsepower data from the dyno,and I dont think there is an exact way to compare to crank horsepower.If you are looking for exact figures and you sound like you are.From what I have read on this site it seems like the Dodge guys are being pretty honest if you compare apples to apples.I am sure you will like your RT,I have had a good look at two of their tailgates at the drag strip! Yes I know my truck is heavy but those RT,S work pretty good.
Y2K CC 4.7 AUTO 4X4 3.55 TRAC-LOK SLT K&N 16.35/82.41
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Zaurusman
Dodge Dakota
7/06/2001
22:26:26
| RE: Dyno Testing
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Message:
Swampdak is correct; the stats from most dynos are at the rear wheels and the stats from the factory are definitely at the flywheel. However, this is a truer look at the power since it considers driveline, etc. For example, a stock 3.9 has 175 horses at the flywheel and around 140 at the rear wheels; not sure if that's a stick or auto, but the auto absorbs a little more than the stick. Personally, as far as accelleration goes I prefer to try it out at the track on the quarter mile. I ran it for a baseline not too long ago - about $15 where I go for as many runs as you can fit in (I only ran it three times - afraid I'd break it due to serious wheelhop). I ran it with my K&N and MSD plug wires for an almost-baseline :-) and will run it after every subsequent mod to see what I have gained. I just added a coil and it feels noticeably stronger; I'll confirm in a couple weeks at the track. Thing about the quarter is you can get a more accurate picture - who cares how many horses you have? What matters is how fast your truck is, right? Things like a limited slip diff and wider tires will pay dividends in accelleration, but won't register at the dyno. Of course even this doesn't translate entirely to the road, because you have much better traction on the stip.
On the flip side, a friend of mine tested his Dak on a dyno and discovered that after all his mods, he is roughly back at stock, so it's a good diagnostic tool. -tk
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Anthony G
Dodge Dakota
7/07/2001
15:06:27
| RE: Dyno Testing
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Message:
Well, I just finished my Dyno Testing this morning.
I found out that I only get around 2hp more with an open throttle body.
Max Power on a my Stock 2001 R/T with 4k on the motor, the dyno guys which is a huge mopar fan said my engine would start running optimal near 10k.
28.66 Barometric Pressure
0.67Vapor Pressure
Intake Air 104
Correction Factor 1.08 SAE
My Buddies that where running today said that these figures where low. The Dyno was correcting my HP to a lower figure even at 104F WOW If anything it should of raise my figures not lower them!
Not taking numbers that are not in Second Gear run. If I did it would of been 212hp 337.tq
SAE Corrected
Run1: 207.7 hp 303.4 tq Stock
Run2: 208.1 hp 302.0 tq Open Throttle body
Run3: 204.1 hp 300.1tq Stock
You can see putting on a free flow intake like a K&N or anything wouldn't be worth it for a first mod.
I was checking out Hyperchip or something like that an comparing dyno numbers. This puppy was putting more power to the ground than the 270hp *cough* BS 5.3L Chevys, 98 4.6L Rustangs, Ford 150's, an much more. :) Not too bad for a stock R/T I guess!
I heard some 4.7L guys here say R/T don't make anything more that 190hp at the wheels. I guess there where about 18hp off.
3500-4500rpm seems to be the sweet spot on this engine.
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Smokin
Dakota Enthusiast
7/08/2001
00:06:02
| RE: Dyno Testing
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Message:
I strongly disagree that a cold air intake is not a worthy first mod. I had a 2000 RC Dakota R/T and the Quick D intake was the first mod I did. I noticed a nice gain as soon as It went on. I to took it off and ran open throttle body. The engine did not like it and the truck lost quiet a bit of power.The stock intake on a 5.9L is just as good as a open T.B. but any air intake such as the Quick D, Intense Performance,K&N or even airaid will make a Difference and would be a worthy first mod.
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Anthony G
Dodge Dakota
7/08/2001
05:35:36
| RE: Dyno Testing
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Message:
Hey Smokin,
I'm not trying to disagree or anything, but how can an open throttle body be more restrictive than having a Quick D. The dyno didn't notice any improvement that was worth the 150-300 dollar cost of an intake system.
I don't know maybe the 2001's are restricted due to the three cats and less air is required to enter the throttle body because less can come out?
Just an idea.
Maybe an IAT Adjuster should be my first mod.
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Bernd
Gen III
7/08/2001
09:22:52
| RE: Dyno Testing
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Message:
The extra HP from the open TB was from Cold Air, more than likely. When you moving, the air will be disrupted over the TB and can cause a HP loss. (Same thing goes for Carburetors as well.)
You want a smooth, direct delivery to the TB...any Cold air kit will help for that.
1997 Dodge Dakota SLT - V6
Supercharged @ 10#
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Smokin
Dakota Enthusiast
7/08/2001
15:02:31
| RE: Dyno Testing
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Message:
Thanks Bernd, you esplained my point better than I did.I guess having a air intake is sort of like Ram air on SS's and TA's. It's a form of forced induction. I never dynoed my 2000 R/T, but I bet a 10+ rwhp gain with a K&N Gen2 would be possible. I think my QuickD was good for 5-8 rwhp. My QuickD was only $140. The IAT adjustor is definitly a good first mod. Especially for $35.The 5.9L suffers when the heat gets to it. This will be the first mod I do to my 4.7L when I get it. I guess air intakes and exhaust systems are a lot alike, sometimes what you think is the least restrictive doesn't always to the best job. Just like running No cats and no mufflers would yield Less horsepower than a high flow cat and a good catback.
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Anthony G
Dodge Dakota
7/09/2001
10:06:39
| RE: Dyno Testing
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Message:
Well I was just told my power Figures needed to be adjusted. 8% off! Here are the new stats!
224hp 327.6tq @ the wheels!
I never understood how a Ram with a way more restrictive exhaust and the same engine have the same HP figures as an R/T?
Here's an email from a co-worker that dyno tested his car the same day I did my R/T!
"About 17% drivetrain loss is what I figure. 41 hp in your case, so I would say both are correct, the exhaust (which by the way is the loudest stock exhaust I have ever heard, ) and being underrated. I bet the exhaust is worth 10 and it's underrated by 10. That would put you right on. Torque on the dyno's with an automatic is hard to judge against what is advertised because of converter spikes etc. Besides, it's horsepower that gets you down the track fast, torque just gets you out of the hole. :)"
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RAmBOy
Dodge Dakota
JOIN HERE
8/23/2003
10:47:42
| HELp!
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Message:
ok guys, i need sum help, i kno that this is a DAkota site, but i was wonderin if ne1 out there kno's much about RAMs, i have a 1998 dodge ram 1500 with a 360 in it, i was just wonderin, what would be sum good CHEAP preformance mods that i could put time and effort into 2 make my ram more speedy. Thanx
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