advise: torque converter

[topher5150]

So I'm tempting my self into getting an upgrade on my torque converter.

What is the current stall speed on the stock torque converter?

What is a good replacement, I've heard Mach 1, Marauder

What is a reasonable price for labor (got a quote $450-500)

Would it be a gamble to get a used one

any more advice would be great

 

[kustomizingkid]

Stock stall is around 2200-2400 from everything I have read...

The Mach 1, Marauder, Mark VIII, and CV Police Interceptor 11.25" converters all have the identical stall speed, the only difference is that the Marauder and Mach1 converters use better internal parts.

If you swapped to a Mach 1 or Marauder converter you would notice 0 difference in driveability.

I would never risk ruining a trans on a used converter... just me.

Labor anywhere from $300-$500 is reasonable.

I would get a Circle D and Circle D converter only for any 4r70w trans in any car... but that is me. For a lightly modded Mark VIII I would get a 10" Circle D unit with a 3500-4000 rpm stall.

Remember to add a good cooler with a bigger stall, they make lots of heat.

 

[topher5150]

Wow Circle D is expensive is there anything else out there with good quality and a reasonable price

 

[kustomizingkid]

Edge is alright for less that Circle D... remember if the converter goes so does the tranny... a torque converter is no place to cheap out.

 

[driller]

Expect to pay at least $800 for a quality torque converter.

For most I would recommend at least a 3500 stall converter. You really need a good dynochart to select the proper stall rating.

 

[philly0420]

I find the stall speed by getting the car up to 45 with the od off. Floor it and whatever rpms the car is at when it takes off is the stall speed you need. For my mods it was 3200.

 

[Roadboss]

Topher- you need to let us know your engine mods. As Driller pointed out you want to set the stall speed up based on the torque out put of the engine. In my case with the Kennebell Super charger, I have torque from right off idle so I am using a stock Marauder/Mach1 converter. If you were N/A or centrifugal super charged you would ante up for an after market unit, set up with a stall that met your torque curve. Circle D has had a good reputation with the folks who really hammer on their rides.

 

[topher5150]

Topher- you need to let us know your engine mods. As Driller pointed out you want to set the stall speed up based on the torque out put of the engine. In my case with the Kennebell Super charger, I have torque from right off idle so I am using a stock Marauder/Mach1 converter. If you were N/A or centrifugal super charged you would ante up for an after market unit, set up with a stall that met your torque curve. Circle D has had a good reputation with the folks who really hammer on their rides.

Cobra intake, three piece under drive pulley set, plus J-mod, and 3.73's

 

[kustomizingkid]

Do you have IMRC's?

 

[driller]

I was told depending on the torque curve, you want the stall 500-750 rpms below peak torque.

My last dyno indicated peak torque around 4700-4900 and I upgraded my 3800 stall to a 4200+ stall.

 

[topher5150]

Do you have IMRC's?

Yes I do

 

[philly0420]

With your mods and 3200-3500 stall should fit your needs. I would try my method from above.

 

[ford nut]

i would get a circle d and circle d converter only for any 4r70w trans in any car... But that is me. For a lightly modded mark viii i would get a 10" circle d unit with a 3500-4000 rpm stall.

+1

ftmfw