ok firstly i have done the search and i cant find any decent answers..

i am considering installing a stall converter (probably some wear from 2600-3500rpm) into my 02 TJII tippy..has any1 installed them onto a tippy magna before?if so what were the results?i need a bit of advice for my questions...

1.will this screw my car/gearbox etc????

2.what would be the best rpm stall converter size?(i think 2600 as is a good compromise as its a daily driver and also good for off the line)

3.i have been quoted$650 fully installed for a 3000rpm stally..is this sound expensive/cheep/about right.

4.the guy i was talking to said i should take a manual magna at the lights if i get a 3000rpm stally??what are your thoughts?



i origionally came to him wanting a quote to get a manual transfer and he said try a stally, it will be cheeper and better???so its not like he was trying to sell thr stally cos i had the money for the transfew ready to go???

AFAIK - no AMC members have internally modified a 3rd gen auto box. I'd love to do the box next - so I'm keen to hear how you go.

can't quite get my head around what it means to have a 3grand stall....... does that mean it doesn't engage until 3000rpm - or it can safely stall up to 3000rpm.

Cause if it doesn't engage until 3000rpm - **** that!!!! i like leaving my driveway at less than 50km/h.

well thats the next mod..i think 3000rpm is a bit insane.....so im thinking 2600....not much less but better....im not sure how its works....

i think it just allows the engine to rev to the stall converters set point(say 3000rpm for this sake)then enguages.....

It means that it doesnt turn the gearbox until 2600 rpm, but keep us posted on the outcome.

Stock stall is 2100 to 2600 as it is.

Depends on engine torque - torque converters are very interesting/complicated little beasties.

Cheers
Heath Young

Stock stall is 2100 to 2600 as it is.


dude not questioning your knowledge or anythign like that...but how come my car (3rd gen tippy) doesnt wait to hit 2100 before it engages?i think mine is about 900rpm before it does?

i have little knowledge on auto's so disregard this if it sounds stupid?

i'm upgrading my gearbox next year with a standard stall convertor (not sure what rev) with LSD and stregthened CV joints.
Quoted the whole lot at $4000.

No problems.

Your stall speed is measured by the RPM it will rev to when you have your foot on both the brake pedal and accelerator. Mine sits at 2100 rpm when you do this (auto tranny specialist tried this when testing that my stator wasn't locked (or loose) in the torque converter).

'Stalling' an auto off the line is done this way - you remove your foot from the brake pedal and keep it down on the accelerator and it will basically 'dump' the clutch. Really, really bad for the engine/trans.

Cheers
Heath Young

No problems.

Your stall speed is measured by the RPM it will rev to when you have your foot on both the brake pedal and accelerator. Mine sits at 2100 rpm when you do this (auto tranny specialist tried this when testing that my stator wasn't locked (or loose) in the torque converter).

'Stalling' an auto off the line is done this way - you remove your foot from the brake pedal and keep it down on the accelerator and it will basically 'dump' the clutch. Really, really bad for the engine/trans.

Cheers
Heath Young

I've never been able to get a straight answer on this topic - but here goes. You are referring to the torque converter. Yes it will allow you to stall up to 2100rpm - but I'm pretty sure stalling a stock torque converter at all is baaadd m'kay.

My understanding is that a stall converter is a "hi performance" or "race spec" variation of a torque converter - designed specifically for drag racing applications. I'm led to believe that such a device will "stall" the drive shaft until a certain RPM is reached. So in a car with a 3000rpm stall converter...... you can sit there in drive (or 1 etc) and put your foot on the accellerator (no brake) and no power will be sent to the wheels until the engine reaches 3000rpm.

I might be wrong - so hurry up and get it already jared and let us all know how it works.

the purpose of a torque converter is to allow different amounts of torque to be transmitted depending on engine rpm. at low rpms very little torque is transmitted (which is why you creap when you ease off the brake), but this jumps quickly at a certain rpm until nearly all torque is transmitted.

i've never heard of a stall converter but i'm guessing it is replacement torque converter which just requires a higher rpm to transmit most torque. i guess this would be fine if you drive hard, but my guess would be there would be a lot of powerloss at lower rpm.

ok firstly i have done the search and i cant find any decent answers..

i am considering installing a stall converter (probably some wear from 2600-3500rpm) into my 02 TJII tippy..has any1 installed them onto a tippy magna before?if so what were the results?i need a bit of advice for my questions...

1.will this screw my car/gearbox etc????

2.what would be the best rpm stall converter size?(i think 2600 as is a good compromise as its a daily driver and also good for off the line)

3.i have been quoted$650 fully installed for a 3000rpm stally..is this sound expensive/cheep/about right.

4.the guy i was talking to said i should take a manual magna at the lights if i get a 3000rpm stally??what are your thoughts?



i origionally came to him wanting a quote to get a manual transfer and he said try a stally, it will be cheeper and better???so its not like he was trying to sell thr stally cos i had the money for the transfew ready to go???

Price sounds good for a modified torque converter, but you'll need a somewhat large tranny cooler to compensate for extra heat generation, otherwise you'll burn your tranny fluid brown. I doubt you'll take a manual magna tho as they have a .4 diff ratio advantage over you and can also launch at any revs they like, the manuals are 3.75 or thereabouts and the autos 3.35.

I probably wouldn't go a 3000+ stall as you'll notice your fuel economy get hurt and even cruising on the freeway it'll be slipping creating large amounts of heat and inefficiency like you said 2600 sounds like a good compromise to get you off the line harder but still lock up or come close to it when your on the freeway. G/L with the conversion hope you enjoy the boot off the line :P

Matthius

P.S: Heath, afaik the flash point of a 3.5l torque converter is about 2600 but the stall point wont be that high, more like 2200 so 2600 is a 400rpm increase and would likely take the flash point to close to 3k.

i do know that ill need to get a cooler.but also im starting to think i may need to raise the oil pressure in my box aswell to stop slipping?does this sound like a good idea?

Raising the pressure will result in good improvements in shift firmness - I have a hunch that this alone would almost make the auto's as quick as the manuals. I wouldn't go doing anything that will increase the line pressure without strengthening internals however.

Based on what has been said about the difference in diff gears between auto / manual boxes - I'm thinking it might be worth investigating wether these can be changed also.

i do know that ill need to get a cooler.but also im starting to think i may need to raise the oil pressure in my box aswell to stop slipping?does this sound like a good idea?

Jared : You wont stop the slipping if your highstall is above your average driving rpm, if you cruise at 2600 and your stall is at 3000, then your torque converter is doing what it's designed to do and slipping all the time, it will only approach lock up or actually lock up above 3 grand, big stalls are purely a drag thing and on the street basically just equal inefficiency and wheelspin.

Blackbeard : Sorry man but the autos won't ever pull like the manuals until people change their diff ratios, they may launch like a manual but then they will slowly fall behind assuming equal power at the engine. Of course this means they will have a higher potential top speed, but by and large this isnt much use :P

Matthius

i am in the US I have a higher stall converter. And I tthink yes you should be able to take a stock manual off the line. "flash stall" is when you power brake. I forget what is the stock "flash stall"? TO powerbrake all you do is press the brakes and stab the accelator.

OK yeah the stock "flash stall" is around 2400. Mine converter has a "flash stall" of 3200. I never took it to the track after the install but I am guessing it'll shave .4 seconds off your time at least.

And yes the tranny cooler would be beneficial.

OK yeah the stock "flash stall" is around 2400. Mine converter has a "flash stall" of 3200. I never took it to the track after the install but I am guessing it'll shave .4 seconds off your time at least.

And yes the tranny cooler would be beneficial.

Did you find a change in everyday drivabillity and economy?

fuel economy; yah but hardly noticeable

Drivability; well the gas pedal requires slightly more effort but nothing a granny can't get used too. It takes off from the light a lot quicker not sluggish. you'll spin em if you take of from the light at half - 3/4 throttle. First gear is plain nasty with all that low end torque. Trust me, this is the best mod that you can do for money. You won't regret it.

Trust me, this is the best mod that you can do for money. You won't regret it.

I was just curiouse, I have a manual :D

oh i know i was talking in general. by "you" i mean everybody with a auto.

oh i know i was talking in general. by "you" i mean everybody with a auto.

Yeah I know, I wanted to feel special lol

hehe. Hey you know what. Go to yahoo.com. click on videos and then type diamante. On the 4th page you should see my car. I have two videos on there. one of them is my launching with the torque converter. spins for a good second before it takes off. ...... :D i think the videos play with windows media player.

matter of fact here: http://video.search.yahoo.com/search/video?p=diamante&sm=Yahoo%21+Search&toggle=1&ei=UTF-8&fr=FP-tab-vid-t-298&b=61

Far out, your exhaust sounds nice, if thats your car :P

thats the intake...i do have a luckey muffler.

did you watch the right one? Mine is the last one on the first row and first one on the second row.

jay04 what exzactly have u intalled into your auto?a stall converter or somethign different?im having trouble trying to understand?