FWIW, here's just my example...thought I'd state some simple facts.
My avatar car, with the 8" TC that stalls at 5000, does not have a speedo. So I use the tach as my speedo.
Cruising at 2000 rpm in 3rd gear (727 trans) is 40 mph in my car per multiple GPS phone apps. If you instead calculate it by math, with the 4.10 gear and 28" tall tires, 2000 rpm computes to 40.65 mph. That is plenty close on accuracy for me and shows that the TC is not sloppy and slipping away! And yes, I have to keep my foot on the brake at a stoplight to hold the car in place (my cam is 251/255@050 so it idles at about 900 rpm).
Pulling away from a stoplight, you would not know it's a loose converter. Perhaps if I stared at the tach in this car and one with a stock converter (like my other car - the 340 Demon), I would see the difference but there is really no perception of the beast of a TC that is there waiting to be unleashed. When at the track, I hold the launch rpm at 2000-2400 at the light. When the light comes down and I stomp it, it flashes to the 5000 rpm point. Joyful!!
Now if you were to put this TC in some heavy truck or pulling a trailer, you probably would not like it as the slip might be excessive. But in a car like mine, or from what we saw of the OPS car, slip would not be an issue at all. (I reiterate that again, knowing what I know and heard of the OPS car, I'd still say something in the 3800-4000 point would be better and put a smile on his face.)
Now I will say that when I was trying to decide on a TC, member
@Oldmanmopar had posted some things about his orange Duster with an 8" high stall converter. His info convinced me and I spent the coin to get this ATI Treemaster. And glad I did!!
