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kota on 20s
Unregistered
3/28/2001
02:04:54
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 Subject: underdrive pulley
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Message:
I was just wondering if anyone has underdrive pulleys on their trucks and if they work or not. also are they worth the money? I already have an intake, throtle body, and cat back exhaust. thanks
Eric
98 on 20s
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Bernd
GenIII
3/28/2001
08:24:37
| RE: underdrive pulley
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They're worth it for that final "get the last few HP out of the engine" modification.
Bernd D. Ratsch
1997 Dodge Dakota SLT
Supercharged w/Nitrous
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Kris
*GenII*
3/28/2001
16:21:16
| RE: underdrive pulley
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Message:
They worked for me. Just remeber, since most of the kits out there have a larger Alternator pulley which will cause the charge on your truck to get low when you let the truck sit for a couple of minutes. I hear they work great when you instal an electric fan. Look at the Dyno charts on Jon Smiths website, (www.fast4x4.net). The next thing on my list is to get rid of the mechanical fan with an electric.
Kris Harnack
1994 Dakota SLT
V6 / RC / SB / Auto
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Kris239
*DakotaEnthusiast*
9/09/2001
14:33:47
| RE: underdrive pulley
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Message:
We'll it's been a year now since I've had them on and I've been through one alternater because of them. Actually it's because of the Alternator pulley. Right now I have the factory pulleys on because I wasen't sure if I wanted to put a 6-rib belt on 7-rib pulleys (the only size belts available for waterpump + crank OR just crank underdrive pulleys is 6-rib). I've heard "stories" of belts slipping off of pulleys that have and extra rib. So far, the waterpump and crank pulley might go back on (I miss the extra power!!!) because I'm finding a lot of DML'ers who have been doing this for years.
Kris Harnack
1994 Dodge Dakota SLT
3.9L V6 / RC / SB / Auto
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john
Gen II
9/09/2001
14:38:24
| RE: underdrive pulley
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Message:
I have had mine for 2 years, haven't had any problems with the 6 rib belt.Noticable difference with the hp.
92 CC 4x4 318
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Kris239
*DakotaEnthusiast*
9/09/2001
15:40:07
| RE: underdrive pulley
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Message:
With or with out the underdrive alternator pulley?
Kris Harnack
1994 Dodge Dakota SLT
3.9L V6 / RC / SB / Auto
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Bill in Katy
Dodge Dakota
9/09/2001
18:40:27
| RE: underdrive pulley
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Message:
I have the ASP under drive pulley which fits the late 2000 and 2001 5.9L (and 5.2) engines. This is the only pulley I could find for these engines as it has the harmonic balancer and crank pulley as a single unit. Really expensive, abount $160 for the one pulley.
Other year models have a seperate pulley that bolts on to the harmonic balancer.
I had my under drive pulley and my headers installed at the same time. So I can't really say how much performance increase was a result of just the pulley.
No problems with the 6 rib belt after 4,000 miles.
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toxic13
Dodge Dakota
9/10/2001
15:52:48
| RE: underdrive pulley
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Message:
does anyone have JUST the underdrive crank pulley on a 3.9?
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kota on 20s
Dodge Dakota
9/10/2001
20:21:20
| RE: underdrive pulley
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Message:
bill, i know you did the pully and headers an the same time, but what gains did you notice out of them? i think headers are in the near future for me and i just want to know how well they work.
also what mods do you have?
thanks
Eric
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Bill in Katy
Dodge Dakota
9/10/2001
22:04:16
| RE: underdrive pulley
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Message:
I have to say that I was impressed with the results of my "under drive pully/header" modification. It was pretty expensive though (about a grand. I bought the parts and had them installed by Dealer). Not only was there a notable power increase, I have realized a minimum of .5 MPG increase. If I could keep my foot out of the pedal, my MPG would definately be much better. I really liked these results because I could justify these modifications (and many more to come) to my wife. It would have been good to install each modification individually to measure the performance increase from each. Oh well...
I like the looks of the headers. Most modifications you do are not visible. But headers are looking good....
My next performance upgrade is a Holley 52 mm TB. I tried to install one last week but the Holley I received was defective and I had to send it back to be replaced (bad linkage). I should get the replacement tomorrow.
The word I get from Holley, Gibson and Hughes is that with the exhaust improvements that I've made (headers, 3" cat back), the TB upgrade will be the "best modification yet". I HOPE SO.
I haven't really done much else to my 5.9L so far. Other than the stuff already mentioned I have a 180 thermo, Bosch 4s, Jet2 and a drop in K&N.
I plan on an MSD ignition. I'm thinking about a shaker hood 'cause they looking so cool. Also 1.6/1.7 roller rockers, cam, etc.
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kota on 20s
Dodge Dakota
9/10/2001
22:17:03
| RE: underdrive pulley
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Message:
did it make it any louder?
Eric
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Kris239
*DakotaEnthusiast*
9/10/2001
22:24:39
| RE: underdrive pulley
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Message:
Hey Toxic, I know a lot people who put just the crank pulley on, what did you need to know?
Kris Harnack
1994 Dodge Dakota SLT
3.9L V6 / RC / SB / Auto
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Hersbird
Dodge Dakota
9/10/2001
23:49:15
| RE: underdrive pulley
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Message:
If you want a better effect for much less money just put a short belt on it for racing. I forgot that was something else I did to my 93 5.2, it only cost $6 and took about a minute to change. It bypassed the powersteering and A/C. It wouls be OK even cruising around as it runs the waterpump and alt. fine, just takes a little more muscle to turn. I can't remember how long it was, maybe I still have it in the garage...
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toxic13
Dodge Dakota
9/11/2001
09:04:32
| RE: underdrive pulley
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Message:
i was just wondering if they noticed any change in hp/torque and also the price. thanks.
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Bill in Katy
Dodge Dakota
9/11/2001
18:39:56
| RE: underdrive pulley
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Message:
I did not notice any noise level increase with the header install. I have the 3" single side exhaust Gibson. It stays good and quiet until you give it mass quantities of air and fuel. Then.. She bangs.
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toxic13
Dodge Dakota
9/11/2001
23:50:18
| RE: underdrive pulley
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Message:
also, i've seen these in use on other cars and i know that certain applications involve the new pulley replacing the stock pulley AND the harmonic balancer. leaving the vehicle without a balancer. is that the case with our trucks?
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mogli
Dodge Dakota
JOIN HERE
1/11/2004
14:59:00
| RE: underdrive pulley
IP: Logged
Message:
from a stock 45amp to a 70amp alternator.
since the amp is bigger from the stock one, would you consider it safe to underdrive the alternator pulley.
like slower rotation will be offset by higher amp rated alternator?
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