Originally Posted by circle-d

the 258 and 245 numbers are the diameter of the turbine in the torque converter. The bigger the converter is the lower it will stall, assuming the internal design is similar. The other option to consider is that the more power you put down, the higher the stall will be. So if you put a 245mm in a heavy truck with a big power adder you will have a very loose converter. Now in some cases it might be the be the quickest combination. But because the converter is quite loose, you have heat issues and you need some big coolers, and it is not much of a dd. This is of course a relative term, some guys like a 4000 for a dd and some can not stand a 3000. So it really comes down to what the customer wants. I suggest a 258 for power adders or for a dd where you want it to be very street-able, or the 245 for a guy looking for better performance at the track willing to sacrifice a little on the street.

Chris

Originally Posted by guero68

so i am guessing your going with the 258mm with 2500-2700 stall since your running a maggie......so you dont blow thru the lower part of the power band...in order to let the maggie engage right where its making power down low...dont think this low of a stall would be good for a vortech that loves high rpm