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afi360
*R/T*
 
11/20/2002
12:33:17
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 Subject: torque-a-verter
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Message:
ok. torque converters. stall converters. what do they do, how does the mopar stall converter net such a big reduction in e.t.'s, what are the goods and the bads of a stall converter. my truck is a daily driver. is that ok for a stall converter?? first 25 valid answers will get a cookie LOL
**in shadows growing wings**
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R/Truck
Dodge Dakota
JOIN HERE
11/20/2002
12:55:29
| RE: torque-a-verter
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Torque convertor is basically the unit between your engine and tranny, and transfers the power to the tranny. The factory one in your truck now is set at 1500-1600rpm (I think) so when you step on the gas you will notice the rpms build up very slightly and once your moving it locks up.
A stall convertor allows the engine to rev up to a certain point before locking the convertor up. So lets say on the Mopar 2400 Stall (I have in my truck) will allow you to gain the power of 2200-2300 rpms before the unit locks up. This amounts to you being higher up in the powerband when you launch the truck.
The results are lots more power from 0-any speed, and even more power when you accelerate from a cruising speed. Traction becomes bit more of an issue, and you can now stall up the rpms to 1500-2000 at the track and then blast off.
You can put at stall convertor in your truck no matter if it's mild or wild. But the main reason people use them is to get into the powerband quicker, for those with more top end power (highly modified, cams, supercharger, etc.)
Hope this helps
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dragrdan
Dodge Dakota
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11/20/2002
14:34:16
| RE: torque-a-verter
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Message:
how they work:
imagine 2 fans, face to face, one powered(engine side) one not(trans side). the powered fan blows air(or in the case of a torque converter trans fluid) over the blades of the other fan. the speed at which they both spin the same speed is the stall speed(actually about 6-10% difference due to frictional losses etc.. until the lockup clutch engages).
other things that affect stall speed:
engine torque: more torque=higher stall speed
engine can spin up faster than the trans side of the converter can catch up.
vehicle weight: heavier vehicle=higher stall speed same reason as above.
gearing: all others identical a vehicle with 4.56 gears will stall lower than one with 3.55.
anything that makes the vehicle easier to move, lowers stall speed.
in picking a torque converter for a daily driver/performance application, i would suggest picking one that is slightly below your average cruising engine speed( so as not to lose too much efficiency while gaining the highest stall speed possible). and make sure to add an auxilliary trans cooler (if you dont already have one) the extra slippage in the converter(higher stall) heats the transmission fluid alot more.
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FastRT6Dakota
Dodge Dakota
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11/20/2002
21:06:30
|  RE: torque-a-verter
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Hey afi360...
Since they didn't ask, can I have their cookies?
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big_torque
Dodge Dakota
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11/20/2002
21:35:18
| RE: torque-a-verter
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Message:
So will the vehicle move if its just idling ? ( 600-700 rpm ) Sounds like its having a stick shift and slipping the clutch alot.
How important is it to have that aux cooler ?
I have the Mopar 2400 (166K) stall. Its still in the box. I hope it gives me a better 60 footer.
thx
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R/Truck
Dodge Dakota
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11/21/2002
11:42:28
| RE: torque-a-verter
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Message:
Your truck will go in reverse just like before, going forward at idle will be slower, it won't just stand still if that's what your thinking. But if your on a hill or need to idle around the street quickly then yes you will have to give it some gas. The Mopar 2400 is a mild stall, you will get used to it quick and enjoy the hell out of it when playing around town. Off the line power is night and day with it, your truck will be reving like crazy from the get go. But under normal and even aggresive driving conditions there is no real drawbacks or abnormality to it.
If you use Amsoil or Redline the cooler will not be critical, after all it's cold out now. But if you tow or do lots of bumper to bumper driving then it might be a good idea. I have the mopar 2400 and no cooler, but plan on getting one installed this summer.
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cookiemonster
Dodge Dakota
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11/22/2002
21:12:50
| RE: torque-a-verter
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Message:
CCCCCCCCCCCOOOOOOOOOOOOOOOOOOOOOOOOOOKKKKKKKKKKIIIIIIIIEEEEESSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I Love CCCCCCCCCCCCCOOOOOOOOOOOOOOOOKKKKKKKKIEESSS!!!!!!!!!!!!!!!!!!
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afi360
*R/T*
11/23/2002
14:36:13
| RE: torque-a-verter
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Message:
ill send the cookies out asap, but im makin em...theyll probably be growing hair and other weird parts that shouldnt be...thanks for the help guys, i just want to make sure im not f^cking up my truck with some of this stuff...also, where did you mount your trans cooler?? i have a b&m, and i cant find a place to mount it, the last place, the front supports for the fascia on the front of the hood rubbed a hole in the lines..?
check out the msd post, i need help there too AND BAD
**in shadows growing wings**
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Wayne440
Dodge Dakota
JOIN HERE
11/24/2002
11:34:44
| RE: torque-a-verter
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Message:
There are different ways to achieve stall one is to move the fans as described in an earlier post further apart this will increase stall but not efficiency. APS Torque Converters that are now available on the GROUP BUY button at www.apsprecision.com change all of the internal members to adding more negative rake to the impellers and stator giving it High Stall and High Efficiency while increasing the torque multiplication from 1.8X to 2.4X this gives you gobs of extra torque leaving the line. For example if your motor made 200Lb Feet of torque with the stock converter you would get 360Lb Feet at the input shaft of the transmission with APS unit you would get 480Lb Feet imagine what that might do for your 60 Foot Times. The Mopar Performance converter is a good unit for the money but it cannot compare to the Premium Converters from APS or Viper. APS also offers Complete Reprogrammed Valve Bodies, Complete Transmissions, Throttle Bodies, High Ratio Shift Arms, High Capacity Drums, 5-Pinion Planetaries, Special Aluminum Accumulators with Blocker Rods, APS Custom TV Valves, Racing and High Performance Master Kits, basically everything automatic for these transmissions write to info@apsprecision.com or visit the website at www.apsprecision.com for more information also check out tips & tricks section for some interesting reading
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