JMM-3000 series Performance Stall Converter

[Vision Zetec]

Hey,
i was just on your website and read about the new stall converter that you have made! congrats!

can you please explain what a stall converter is. i have the general idea but not really!

thanks

-Daniel

I got a question to with the stall converter. Does it take care of the ECU and torque reduction? I know on my AU2, if I slam the brakes in, and keeps the rev's myself at 2200-2400, when I let her go, you can really feel the car lagging with the ECU/Trans torque redunction...

[Casper]

I6 AU's do NOT have significant torque reduction like the V8's.

[SpoolMan]

I don’t know how bad the reduction is, but the more you stall the worse it gets....we done 2.45 - 60 foot on 2100 rpm stall up...
then 2.18 - 60 foot from a 1200 rpm stall, looks to me there is something sending a lot of sympathy to the auto...
this was done on a AU 6 Forte..

[jonbays]

I agree with the effect of a hard stall up on an I6.

My wagon is exactly the same. A light stall 1000-1200 rpm is best any more and it sort of limps away from the line no doubt about it.

Exactly why though not too sure. I guess it has to be an ecu function of some kind though as i can't see how or why the torque converter would do this.

[Casper]

Mine is the same but I dont believe it is a torque reduction issue. I personally think that by stalling up to maximum the motor itself is doing something rather than the auto telling it to reduce power.
I'll know soon enough. If it is torque reduction (which I'm convinced it isnt) then fitting a 3000rpm converter will have absolutely no effect on the car as the auto will still crap out at about 2000rpm. I doubt this will be the case. I'm betting I'll be able to stall to well in excess of 2000rpm without any "lag" off the line. In which case the idea of torque reduction goes straight out the window.

I'll let everyone know.

[SpoolMan]

Jason at Dominator tells us 2800rpm is the limit, some cars wont handle that, they have had the odd car which will handle more...
we had plenty of limp home mods with a 2500 rpm stall, power and torque also effects the way the limp home mode works...

[Casper]

Well, the 3000rpm is going into the car in August, apparently I can get around the limp home mode. May be a J3 plug function, not sure. I'll find out from Brenden later on but this stall has already been fitted and workng in other EECV cars so there must be a way.

[EFFalcon]

From what i heard there is a limp home mode work around.
i spoke to someone a few weeks ago about it and they said it was a very simple change.

[SpoolMan]

Originally Posted by EFFalcon

From what i heard there is a limp home mode work around.
i spoke to someone a few weeks ago about it and they said it was a very simple change.

Hi John, do share your info or send me a PM..
Chiptorque as of around 6 weeks back did not have the capability’s to stop the limp home mode...

[EFFalcon]

Originally Posted by XRFPV8

Hi John, do share your info or send me a PM..
Chiptorque as of around 6 weeks back did not have the capability’s to stop the limp home mode...

I wish i could give you more information.
i'm only going from what i was told by someone i was talking about who owned an EB.
they had the auto shift kitted and were looking at stall converters at the time, i said to them about the ~2500rpm limit and he said he knew about it and some auto trans place had a work around, unfortauntely i don't know the guy or recall the name of the place

[Brenden]

One of our AU customers recently put a 3000 series stall in his car with Dev5 and tricks, first run with street tyres was apparantly useless, so he donned the slicks and still apparently traction problems in first gear. Overall an instant improvement in 60 foot times from 2.2 and 2.3 to straight 2's off the line with no traction. Both slicks and street tyres showed dramitic improvement off the line, however on the street its a tyre burner, or at least that was the complaint !

[SpoolMan]

Originally Posted by Brenden

One of our AU customers recently put a 3000 series stall in his car with Dev5 and tricks

Hi Brendan, can i ask the 3000 series Hi Stall, what RPM does it stall to?

[Sylox]

Originally Posted by Brenden

One of our AU customers recently put a 3000 series stall in his car with Dev5 and tricks, first run with street tyres was apparantly useless, so he donned the slicks and still apparently traction problems in first gear. Overall an instant improvement in 60 foot times from 2.2 and 2.3 to straight 2's off the line with no traction. Both slicks and street tyres showed dramitic improvement off the line, however on the street its a tyre burner, or at least that was the complaint !

Brenden I realise that your focus is the I6, but do you know if your 3000convertors will run free of limp home mode in the Au xr8's ??? We have this problem also....

[Casper]

God Damn it August..HURRY UP!! I want to play!!!

[Casper]

From the site:

Launching a Falcon fitted with a trusty 4 speed BTR automatic transmission off the line has always been a daunting task. The high ratio first gear in the BTR 4 speeds never gave Ford fans a chance against the low ratio thunder of the Holden TH700.

The task of launching a falcon off the line has been left up to clumsy diff ratio changes, which is great for the drag strip but only leads to huge fuel consumption on the Street. Matched with the cost of re-calibrating the speedo and altering speed limiters to get your vehicle running correctly, only makes diff ratio changes a very expensive and stressful task.

After two years of various testing programs, Jim Mock Motorsport has come up with the answer. The new JMM 3000 series Performance Stall Converter for 4 speed BTR transmissions will transform the Falcon owner’s high ratio BTR 4 speed slug into a line munching machine.

Brenden Mock from JMM designed the converter to aggressively stall to the desired lockup speed and launch. Quite often tyre smoking is a result. Brenden wanted to keep the street ability of the auto as well, so light throttle driving is still as per normal and the overdrive lockup plate takes over while cruising or on the highway, keeping fuel economy to the max.

Matched with a JMM-DEV5 Engine Performance Kit and a 3.45 ratio limit slip diff, the JMM 3000 Series Converter will flash to 3100 rpm instantly. If fitted behind a stock engine, the stall speed of up to 2500 rpm is normal. In Basic, the more power you make the higher it will stall. If used in conjunction with a turbocharged setup stall speeds of well over 3000 rpm are an easy task.

Jim Mock Motorsport state “The main aim of the converter is to keep a sensible diff ratio and be able to launch the car hard off the line. At the same time, having a torque converter that actually works and doesn’t continuously slip once past the stall speed was a big task. Some modified converters will stall and then slip their way thru the rev range basically chewing the fuel and loosing power. We also modify the lockup in the converter to ensure good economy and drive ability”.

“Next thing to do is fit the stall converter with a lower diff ratio, a setup suitable for full time racers, and hold on”.

[SpoolMan]

Thanks Casper that explians the Hamburger with the lot...

[asian_warrior01]

when you go through the gears does the stall converter work then aswell or only off the line. i inderstand how a stardard tourqe converter and a stall converter to a degree but whats got me how do you take off the line right

[XplosiveR6]

Brenden Mock from JMM designed the converter to aggressively stall to the desired lockup speed and launch. Quite often tyre smoking is a result. Brenden wanted to keep the street ability of the auto as well, so light throttle driving is still as per normal and the overdrive lockup plate takes over while cruising or on the highway, keeping fuel economy to the max.

that has me real interested, nice and stock acting in normal driving, but when you punch it, its steight to max tourque, i like

[asian_warrior01]

but what happens during gear changes when you punch it

[Casper]

Originally Posted by asian_warrior01

but what happens during gear changes when you punch it

Exactly the same as what happens now if you are punching it from a standstill as your gear changes occur at 5500rpm and only drops down to about 3800rpm or thereabouts so you are above the stall speed. If you floor it while just cruising it will select the lowest ratio gear it can...usually putting you well above 3000rpm anyhow.

Its really just for good launches as, once moving, if your "going for it" your going to stay well above the 3000rpm stall speed anyhow.

[asian_warrior01]

thanks for that,last bit of info i need is how do you launch are car successfully of the line with are car with a stall converter

[Casper]

Originally Posted by asian_warrior01

thanks for that,last bit of info i need is how do you launch are car successfully of the line with are car with a stall converter

Same way you do now. All auto's in Falcons have stall converters already, they are just not as high as the JMM3000.
So there is no major difference except the car can stall higher therefore getting the engine into the peak power band earlier....and that gets you moving faster.

Originally Posted by Casper

Same way you do now. All auto's in Falcons have stall converters already, they are just not as high as the JMM3000.
So there is no major difference except the car can stall higher therefore getting the engine into the peak power band earlier....and that gets you moving faster.

So there's an off switch? So it has a normal idle? No need to smoke Mrs. Librarian in her Barina... :p

[asian_warrior01]

thanks casper your were a great help cheers

[Sylox]

Doesnt quite work like that bangers.

When you tromp it the revs jump to 3000RPM and dump you into the torque
driving normally they just drive nearly like stock

[Laminge]

Will have to proove this theory on Thursday

[DUMTEF]

im very much interested in one of these for my ef, my only questions is in regards to limp home mode, have you guys come up with a way around it??

Cheers Adam

[Casper]

Originally Posted by DUMTEF

im very much interested in one of these for my ef, my only questions is in regards to limp home mode, have you guys come up with a way around it??

Cheers Adam

Well, I know of one E series and one AU that has it fitted and both have stated that there has been no limp home issues so whatever they have done it works.

[Casper]

Originally Posted by Laminge

Will have to proove this theory on Thursday

Well, from what I hear the threory has been proven to be VERY much fact now hasnt it Gary? :hihi: