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hi stall benefits/downfalls when not stalling it up 

 

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 Post subject: hi stall benefits/downfalls when not stalling it up
Posted: Wed Aug 09, 2006 6:29 pm 
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Hi guys

Ok quick simple question. Is there any benefit in having a histall if you don't stall up your car at the lights. So if you just flat foot it from idle revs will it be faster with a histall than without one? Also what about in-gear acceleration.

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Posted: Wed Aug 09, 2006 6:40 pm 
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Yes, it'll be faster.... assuming the CORRECT stall speed has been selected for the engine. There's a lot of write ups about torque converters on the web, this is one of the better ones imo:

http://www.tciauto.com/tech_info/torque ... lained.htm

Particualrly the part on stall speed.

 

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Posted: Wed Aug 09, 2006 6:51 pm 
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4.9 EF Futura wrote:
Yes, it'll be faster.... assuming the CORRECT stall speed has been selected for the engine. There's a lot of write ups about torque converters on the web, this is one of the better ones imo:

http://www.tciauto.com/tech_info/torque ... lained.htm

Particualrly the part on stall speed.


Yeah I read that one and about 10 different articles about them. It's hard to get a clear answer though.. or to extract one from the articles. I just confuse myself
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Posted: Wed Aug 09, 2006 7:08 pm 
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You ever spend much time driving a manual?

Think of the stall rpm as the point where you're letting the clutch out and it really starts to launch. It will move BEFORE that point, but not as efficiently...

By moving the stall RPM, you're moving the RPM at which the torque converter starts to really transfer the power to the transmission.

 

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Posted: Wed Aug 09, 2006 7:18 pm 
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Awesome. Now here's where I get confused...
Does that mean that at lower rpm you lose power because the hi stall slips a lot or does it mean that the torque convertor keeps your engine's revs higher so that it can transfer more torque?
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Posted: Thu Aug 10, 2006 5:19 pm 
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having 2nd thoughts bout ur manual conversion adam?

if so, i know someone who may be interested..

 

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Posted: Thu Aug 10, 2006 5:27 pm 
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Gaz wrote:
having 2nd thoughts bout ur manual conversion adam?

if so, i know someone who may be interested..


Not 2nd thoughts.. I already got rid of it. Can always get another one.. but I'd prefer auto. Just investigating all options and making sure I understand everything involved with both before I fork out my money and time.
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Posted: Thu Aug 10, 2006 5:39 pm 
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AdamN wrote:
Awesome. Now here's where I get confused...
Does that mean that at lower rpm you lose power because the hi stall slips a lot or does it mean that the torque convertor keeps your engine's revs higher so that it can transfer more torque?


Well yes, the efficiency below the stall rpm is reduced, by the very nature that the torque converter has been designed to raise the stall point.

But if you've chosen an appopriate combo, its not a huge problem because your engine will prob not have much to offer at these revs.

Hence, why you dont want to go around putting rude torque converters behind standard cars. Its all about getting the right combo.

 

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Posted: Thu Aug 10, 2006 5:51 pm 
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From what I'm hearing.. I think putting a histall into a car that I gotta drive daily is not a good idea.
I think manual is the way to go for sure :)
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Posted: Thu Aug 10, 2006 6:17 pm 
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Its probably not as bad as it sounds lol. Im just getting at the fact that it's important to make sure your engine is going to beneift.

Rude cams and forced induction tend to benefit the most. And if rude cams are your kind of thing, its gonna be a bugger to putter in traffic regardless of the transmission :)

 

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Posted: Thu Aug 10, 2006 6:28 pm 
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I have a mild cam (RPD Rspec3).. I was thinking maybe a cheaper alternative to a manual would be a histall for a performance boost.

A manual would mean that I can change my diff ratio too... just can't beat that kind of flexibility.
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Posted: Thu Aug 10, 2006 6:57 pm 
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im thinking of going manual, purely for the fact that ive driven an auto ever since i got my P's even tho i got a manual license, had about 1 hr in a manual in just over 3 years.

and when i look at a new car in maybe 12 months time, coughing up a lot more money wanna know if i like driving the manual all the time or just stick with the auto, figure may aswell try it out now and see how i go, where its not gonna cost me heaps.


Only concern is gettin the car rego changed to manual, being manual fairmont wasnt an option, however it says 'approval isnt required when chaging transmissions to one that was optional on that make and model'. now, technically its a fairmont, but the complience plates do just say ford falcon sedan.


im pretty keen to do it soon, more for the fact that my auto really needs a service i think, its gettin a little rougher. and dont wanna go service it and whack a manual in a few weeks later.

 

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Posted: Thu Aug 10, 2006 7:10 pm 
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I did have a drive in a mate's manual ef fairmont... first 2 gears are winner..

manual + 3.7lsd diff is next on my list then
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