Choda

iTrader: (1)

^^^ normal is not in boost. just cruising around

03sierraslt

iTrader: (22)

That's fairly subjective seeing as thought I can be in boost at 1800rpm and 25% throttle. My point was how do they act once boost rolls on at lower rpm. Some converters blow right through when you put power to them, I am not saying a circle D converter does I am simply asking how it responds.

My converter is a 2800 and that's what it stalls to on launch however if I really load it up a hill or something I can get it to push out to 3100 or so.

Some converters act tight morally but when you throw the coals at them they push way past stall speed.

Atomic

iTrader: (42)

There are two main things about a converter; stall speed and coupling. Stall speed is more obvious, its the rpm at which the vehicle begins moving forward. Coupling isnt talked about as much, but when someone says their converter is being blown through, it isnt coupling. The larger the converter, the sooner it will couple in the rpm range.

shifty89

iTrader: (1)

Stall speed is the point at which the vehicle begins to move? That doesn't sound right

TIM Z

iTrader: (12)

I would never run a single disc on a boosted vehicle or even a heavy truck .

03sierraslt

iTrader: (22)

If doing a full power launch that's the speed the vehicle will start to move. my 2800 starts moving the truck at 1100 or so under light throttle. Maybe even less as I don't pay much attention.

Vortec350ss

iTrader: (20)

I just opened this can of worms a couple months ago.
https://www.performancetrucks.net/fo...ock-up-520277/

Long story short I went with a multi disc...

shifty89

iTrader: (1)

Which would be true stall. When brake stalling for the launch, the point the when the truck would actually stall (engine not converter) but the tires will spin first.

Point is like you said the truck will move long before stall speed is reached. Anyone out there ran both yank and circle d converters? Driving comparisons?

tempoffroad

I have circle d multi with 3200 stall I run it hard but under normal driving it acts about like stock.

GMCtrk

iTrader: (27)

Have you dyno'd your truck or are you just guessing that it makes 600 rwhp at 8-13 psi?

As far as the torque converter goes, there will be no reference until you actually try one. I think what's tolerable for one person may be too loose for another.

I ran a Yank 80e PT3600 several years back which was the baddest converter they made at the time and it was a smidge to loose for my liking. It definitely wasn't a converter I wanted to tow or haul with. Now, I'm planning on another Yank, and definitely a multidisc this time and I will take it down one notch on the stall speed, probably 3200 but I will talk to Dave and see how a 3000 or 3400 would respond.

To be honest with you, I don't agree with the statement that you need a triple disk with heavy FI. People ran single disk's for years with good results and even the converter I had was built to handle upwards of 1000hp. From my experience with the CircleD triple disk, the lockup on them is very strong and rough so if that's not your thing that may be a detractor. Me, I like hard shifts and lockup so I see it as a plus.