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3000 stall torque converter

G

guillengello

New CEG'er
Joined
Feb 7, 2007
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hi my name is roger and i own a mercury cougar 99 2.5 atx.... i know wrong forum but i have been reading the old posts about the high stall converters and I still need help... well i purchased a 3000 stall torque converter my oem had 150,000 miles and wanted something with more power and reliable... after I had the new torque converter installed there seems to be no torque till i hit about 3500 rpm's then it takes off stong!!! I have a cel for running rich both banks, I'll have a custom superchips chip tuned for my car by a local dealer on wed... But did i get the torque converter stall too high??? fixing the air/fuel ratio would help my problem due to have the car running like crap "19lbs injectors a bigger maf" ???? can i have the chip change the oil pressure to have the torque converter stall with the chip?? any ideas you guys?? any input would help...

ohh yeah i have:
svt lite including maf and injectors...CAI..custom dual exhaust with highflow cat..custom y-pipe...gutted precats..pws & crank pulleys...tranny cooler..superchips tune chip..filled motor mounts
 
guillengello said:
hi my name is roger and i own a mercury cougar 99 2.5 atx.... i know wrong forum but i have been reading the old posts about the high stall converters and I still need help... well i purchased a 3000 stall torque converter my oem had 150,000 miles and wanted something with more power and reliable... after I had the new torque converter installed there seems to be no torque till i hit about 3500 rpm's then it takes off stong!!! I have a cel for running rich both banks, I'll have a custom superchips chip tuned for my car by a local dealer on wed... But did i get the torque converter stall too high??? fixing the air/fuel ratio would help my problem due to have the car running like crap "19lbs injectors a bigger maf" ???? can i have the chip change the oil pressure to have the torque converter stall with the chip?? any ideas you guys?? any input would help...

ohh yeah i have:
svt lite including maf and injectors...CAI..custom dual exhaust with highflow cat..custom y-pipe...gutted precats..pws & crank pulleys...tranny cooler..superchips tune chip..filled motor mounts
Click to expand...


Yes. Too high of a stall for any kind of normal driving. That would be for a high rpm engine and/or drag racing only. OR different gearing in your ATX.
None of which you can really do on the CD4e since it is limited in peak rpm and not strong enough for serious drag racing.
The best think is probalby a built stock converter with stronger components. And then a healthy shot of nitrous. lol
 
warmonger said:
Yes. Too high of a stall for any kind of normal driving. That would be for a high rpm engine and/or drag racing only. OR different gearing in your ATX.
None of which you can really do on the CD4e since it is limited in peak rpm and not strong enough for serious drag racing.
The best think is probalby a built stock converter with stronger components. And then a healthy shot of nitrous. lol
Click to expand...


would i be able to change the trannys oil presure with the superchips tune chip to make the torque converter lock at lower rpm?? well the stock converter is 2600 +/- and mine is 3000 about 400 rpm higher than stock... what would be my best option??? i dont really want to take it back to the shop and have another torque converter installed....
 
You might try to see what you can find from Russells early posts or try sending him a PM. I havn't noticed him posting for a while. As far as I know he is the only one that has posted about a high stall speed torqlue convertor.

Purely off theory and from prior experience on other cars, raising the stall speed about 500 RPM over stock sounds like a good idea. Theory and practice don't always match. That engine really comes to life when the revs pick up a bit, and a higher speed torque converter should (in theory) get the engine up to its working area quicker.

I have had small block Fords and Chevys with 3000 RPM stall torque converters which engines with hotter than stock cams and they work very well.

No one has seemed to make them work on a Contour.
 
Big Jim said:
You might try to see what you can find from Russells early posts or try sending him a PM. I havn't noticed him posting for a while. As far as I know he is the only one that has posted about a high stall speed torqlue convertor.

Purely off theory and from prior experience on other cars, raising the stall speed about 500 RPM over stock sounds like a good idea. Theory and practice don't always match. That engine really comes to life when the revs pick up a bit, and a higher speed torque converter should (in theory) get the engine up to its working area quicker.

I have had small block Fords and Chevys with 3000 RPM stall torque converters which engines with hotter than stock cams and they work very well.

No one has seemed to make them work on a Contour.
Click to expand...

i found this in http://www.babcox.com/editorial/bf/bf90054.htm:

"One of the classic symptoms of a bad torque converter is a vehicle that is sluggish or lugs when starting out from a dead stop. The vehicle may feel as if it is in second or third gear rather than first gear. What's happening is the torque converter is failing to provide any torque multiplication because the one-way stator clutch is not holding, allowing the stator wheel to slip.....
To test the torque converter, you need to perform a "stall test." A stall test will reveal the maximum engine rpm that converter can handle with the brakes applied"

I tried the "stall test" and it would only rev to about 2500-3000 rpm but the was it wouldnt do anything like if it was in neutral... could it be a problem with my torque converter???
 
A stall test is how the high stall rating of the torque converter is confirmed. You have a 3000 RPM stall converter and it stalled at 3000 RPM. Sounds about right to me.
 
Although it stalled it is not like before... i have no power at all till i hit 3000 and it was never like this.. ill call the shop where i purchased the torque convertr and ask if the symptoms im having could be a problem with the torque converter...
 
I drive yesterday back to school and i put the car in reverse in order to park my car and the car would just saty still like if it was in neutral... then i gave it a little gas and it moved but way to aggresive I almost hit my girlfriends car that was parked behind me :crazy: lol...could I go to a transmission shop and have the guys check my torque converter i dont have a cel for any part of the transmission soo what do you guys think??
 
Well, the car isn't going to move until you get to 3000 rpms, now is it? High stall torque converters serve another purpose besides getting an engine cam into its sweet spot for launches. It keeps the drive train from destroying itself at idle when you've got a lopy cam and you're at a stop with your foot on the brake and the transmission is in gear. The question is, does stall speed = lock up speed? If so, that 2600 rpm figure you gave is erroneous. A normal stock vehicle will begin to creep at idle with the tranny in gear. Either something is wrong with the new TQ, the computer doesn't know what to do with it, OR the TQ was never meant to be used in a stock vehicle.

I think this is a case of one wrong component botching up the entire system. In ordinary car parlance, you'd never put a high stall TQ in a car unless it had the cam, intake, exhaust and final drive ratio to handle it all as a total package. Changing out just one component is not going to give the same performance and may actually hinder stock performance depending on what component was changed. Headers/custom exhaust is probably the one thing that won't hurt but total engine performance gain won't be acheived until everything matches as a system. I'm using non-ECU controlled cars in my example. YMMV.
Karl
 
I talked to the owner of the shop that built me the torque converter and told me that i need a shift kit to make the stall raise faster... well i told him about the transgo shift kit is only a problem solving more than a performance and he mention better valves so i figured he was talking about sonnax or something similar... is he correct??? i mean he was very helpfull and even told me that if i need any modyfications to the torque converter he would do them... what do you guys think?? if i take the car to a transmission shop would they be able to help me find out what is causing my problem??
 
I'm not sure how you're able to torque up to 2600 with a stock TC. The highest I have ever been able to do is 2200-2300.
 
99SEsport2K4 said:
I'm not sure how you're able to torque up to 2600 with a stock TC. The highest I have ever been able to do is 2200-2300.
Click to expand...

The converter I installed its a high stall converter @ 3000... and yes with the sotck converter it was about 2300 ... I guess i'll try the brake stall test again i only tried it twice and i may be wrong... although i do remember that there was no power at all and the brakes would hold the car like there was no acceleration... should I tell this to the owner of the shop who build me the torque converter or would I void the warranty due to abusing the converter??
 
I drove the car today and at a completle stopped when I floor the gas pedal it has no power and slowly gains power and around 3000-3500 it takes off.. also when I put it in drive it takes longer for the car to start moving, and if i put it in reverse the torque converter doesent lock. I actually need to press the gas to start moving similar to a mtx....

When I tried the brake stall test the car will rev to 2500 but it does not move the car at all.. i know the stall is 3000 but before even at 1800-2300 the on stock converter (2600 +/-) there was more power than now, but driving in highway there is no problem.

What do you guys think?? is there a problem with my high stall torque conveter?? do i have to program the tranny computer to know that it has a higher stall??? the shop where i purchased told me that i needed to upgrade my tranny valve body and that would make it better.. is this true???
sorry for the huge essay.. thanks roger..
 
I think you have a problem with the torque converter. I think they changed more than just the stall speed.

It is normal for a high stall torque converter to loose a little low speed response, but you have lost way too much.
 
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