Originally Posted by zipper06

Apples VS Oranges here, If you have a light car you can run a smaller dia. converter and get away with it, such as David said, but with a heavy car the torque will blow right thru a small converter.
I did some testing yrs. ago. I had a 9" Hughes converter stalled at 5500 rpm car ran 10.31 @129.85 weighing 3100lbs with a 406" motor. Probably not more than 500 ft lbs torque. A friend had a 2400lb willys and a 8" converter also Hughes 6,000 stall. I put that converter in my car and it slowed down to 118 MPH and went up to 10.85 ET absolutely no other changes all due to the weight of the car. So the weight factor and the torque played all the difference in the world. I can say that most converter builders will not sell you a converter smaller than 10" for a blown alcohol door car and stand behind it. I know that Kenny Ford that owns PTC won't and i've known him for yrs. and only use his converters, and Bill Taylor from BTE won't either.

JMO

Zip.