PRNDL

Anyone running a higher stall converter? If so, what stall are you using? Does anyone know what the stock unit stall numbers are?

FiveOhFuzzF150

u tryin to race your truck?

Phyer Phyter

Put your truck in gear, stand on the brakes and floor your gas pedal. What rpm your tach says while floored, is the stall speed of your torque converter.

Phyer Phyter

Why do you want a higher stall torque converter?

kent johnson

Hmmm, stand on the brakes and floor it then see what my rpms are. I think thats called a burnout. Im sure u meant rpms before the tires break loose, i just couldnt resist. Sorry

PRNDL

Just curious. Everyone gets taller gears, like 3.73's, 4.10's, and 4.56's. Especially with big tires.

Ive seen on other vehicle forums where people keep their rear end ratios high like 3.31 or so, but use really high stall torque converters. Mostly for drag racing. Mustangs with the same transmissions we have.

I was just wondering if that was yet another way to boost performance. This is a forum right? To ask questions and start conversations.

No, i wasn't planning on doing this. I don't have cams and my 5.4 is a slow torque monster. If anything i would get some 3.73's. Besides the 1st gear on these 6r80 are nice and low.

Phyer Phyter

Nope, never said anything about spinning the tires or doing a burn out. If I had meant for the OP to spin the tires or do a burnout I would've said so.

Always amazes me here how people nit pik and try to split hairs with answers people give.

You want full engine load in gear with out spinning the tires, with out doing a burn out, with out the vehicle moving. The RPM reached under full load is your torque converter stall speed. If the tires are spinning or vehicle is moving - then you are not under full load. You only want to do this for as long as it takes to reach full load and read the tachometer.

Phyer Phyter

Higher gears will give more torque -
Higher stall torque converter will give you -in a sense- more power to the wheels sooner but no increase in power. Picture a propeller and a rubber band. Wind up the band 10 times then let the propeller go. Now wind up the rubber band 20 times and let the propeller go. It will start off faster than the 10 wind did. This is in a sence what your torque converter does.

PRNDL

Thanks guys.

fordfan77

Bottom line, for the best performance your cams, gears, and torque converter need to be matched to each other.

Good transmission shops will want to know the horsepower & torque, cam duration and gear ratio before they can tell you the best torque converter for your application.