I was thinking of installing a lockup switch on my PT4400. Is it worth and mph and et??

 

Not sure about ET but I know its worth a 1-2 MPH. Good Luck

WeS

 

I'm looking for mph and et. If people have done it and not pick up et it is not worth it to me.

 

On the motor I didn't really pick up anything, but I haven't tried it too many times. But on the bottle it makes a world of difference with that converter being so loose. I think it's going to depend a lot on your combo/ peak horsepower, gears, tire size, cam, etc...

Jeffrey

 

At what speed/rpm do you lock up your converter for best results?

 

I lock my PT 4200 at around 6200 in 3rd. Picks up about a tenth and 2 mph on average

 

do yall happen to want to sell those pt's??

 

My best results have came from locking my verter in 3rd a little over 100 mph. As far as my rpm, it's at ~6000, but most of my run is at ~6000 or over with that verter on the bottle anyway.

Jeffrey

 

I tried a lockup switch on my pt4400 today. I let it shift inot 3rd and I locked it up at about 6000rpm. My rpms went all the way down to 5,000 rpm. I lost 2mph on that pass. That was the first and last time I tried the lockup switch.

 

i would lock up the convertor no lower than 6100-6200 otherwise it will BOG hard and loose the mph. i have seen too many guys lock up the convertor too early, esp on nitrous passes, and BAD results occured. i have done it too on motor and had no ET difference. just my .02

 

Anyone else tried this, or is this something that works and no one tells you about it after you do it.....

 

The pt4400 already has the posi-lockup clutch, if your engine makes over 475lbs of torque it will lockup

from yank's website

PRO THRUSTER 4000, 4200, 4400, 4600 (245mm, Stall speed 4000 through 4600, Posi Lock-Up Clutch w/Kevlar Linings, lightweight billet cover, 2.2-2.7 STR)

Posi lock-up clutch:

Yank Converters has made a breakthrough with the Posi lock-up clutch. By placing proprietary bearings between the lock-up clutch and the housing, while utilizing the highest grade carbon ceramic or kevlar linings, the converter can actually lock-up under the high torque load of a power adder like nitrous oxide or a blower! This positive lock-up action takes place when the engine torque exceeds 475 lb. ft. This will give the racer torque to the tires, close to that of a manual transmission. This is a Yank exclusive!

 

Is this somethng new? My car makes ~600 rwtq and mine definately doesn't lock unless I make it.

Jeffrey

 

I dunno maybe?

Maybe Yank will chime in, I think maybe the older PT series doesn't have it or it is an option?

 

I'd also like to know about this feature