I have been researching converter choices and have some questions for those who are using higher stall than stock.
These trucks run very well using the stock converter due to the great torque output, but we all search for any improvements. I see most seem to go with the Precission Industries 2400, or the Factory Tech 2400-2600. All seem to report small, but measurable gains.
I feel, looking at my power and torque curves that a higher stall would yield greater improvements. I am looking specifically at the Yank 3000 stall converter. HP and TQ are rising quickly above 3000 rpm.
Anyone running this converter? Higher stall a problem with shock loads and breakage? All help greatly appreciated.
Jim

 

a 2400 is more practical for a daily driver and weekend warrior.

 

I feel anything above 2600 and you and gonna be missing out on a lot of your low end torque which you want.
I run a Pro Torque 2600, they can build you anything you want basically.
If you have any questions or want some info drop me a line.
svt_f150@sbcglobal.net
-Mat-

 

Looking at my torqe curve I am about 480# at 2500 and over 500# at 3000 rpm. HP is at least 50 additional at 3000 vs 2500. Torque stays over 500# thru 4500 rpm, so I only see an advantage to raising stall to launch in a higher torque range.
I expect slight drivability issues and realize I must deal with the extra heat, but have used high stall converters before on other projects with great success.
Jim

 

Not sure if you are considering traction?

I like to run street radials just for fun and to hone my skills. And I'll tell ya... It took me quite a while to get back to where I was with the stock convertor (nothing else changed). It's much harder to launch off the line and *not* spin the tires. If you got big fat slicks then I suppose it's not an issue.

Something else to consider is that there is going to be a point of diminished returns for a street driven truck. Your gonna be at 3000rpms at about the 5-10ft mark.. is it really worth the trade off?

Rich

 

When the time comes for a converter, Yank is Tell Mike exactly what you got, what you want, and thats what you'll get. Corvette owners swear by Yank converters, and there isnt a group of car guys more picky/demanding than them.

 

I've always heard good things about the yank brand.

btw: I have a "suncoast" brand. Been perfect since installed.

 

Don't be afraid at all to go to a 2800 stall converter. I ran one of these on the street for two years on my '99 before I converted it to a race-only truck. I had, at the time, a Precision. It rattled like a mother, which is why I got rid of it, but it was hardly noticeable as far as easy driving. Like Rich said, though, when you try for a quick takeoff getting traction on the street became a "learned" talent.

A 3000 stall might work ok at the track, but I don't know how it would be on the street.

Remember that converters are not an exact science and stall will vary with horsepower and vehicle weight.

 

Factory Tech Total Domination Converter here. I love this frigging thing on the street stap it and you are instantly roasting the tires, drive it normal and it's like having a stick without the shifting. Truck is always in the power. I'll let you now how it launches at the track tomorrow night....

 

Torque really determines how stall will work. 2 trucks at the same wieght can vary in performance with the same converter depending on how much torque each vehicle acheives through out the torque band.
Where it flashes at is also a different story.
I would suggest a 2200 stall just because Lightnings build torque so quickly. Plus if you are using a shorter slick you are gaining gear ratio, so a lower stall will act like a larger one.
Just my .02

Scott

 

Typical "rule of thumb" is for lock-up at 400-500 rpm below torque peak. Around 2400 rpm is probably best for all but wilder cammed trucks. If racing you want to make sure you go with a converter with a quick reaction time. My PI is at least 0.05 seconds quicker on RT tan my previous converter.

 

When I ask Yank about a converter for our Gen 2's this is the reply I got...

quote"Sorry but we do not make a converter to fit that application.

Best Regards
Dave Myers."

 

I did not end up going with the Yank choosing a 2800 stall PI instead at the reccomendation of JDM. They reported some problems on very high HP trucks with the Yank.
They do, however, list a converter right on their website called the Torque Thruster 3000. It is very efficient and reportedly a real nice piece for a bolt on enhanced truck.
Jim

 

Ok...didn't see one for a 4R100 just YANK TRUCK THRUSTER 3000 4L60E/4L65E...I'll go with another setup anyway...Thankjs

 

heres the Yank specs.... 265mm
3000stall
3.0 str (str= multiplication factor)
Our trans are rated to 1000torque,so 500torque (2x str) is pushing it.

I think stock str is 2.0??? Yank at 3.0... What str is the PI converter?