Is there any advantage to change torque converter to a different stall speed, the vehicle is used for towing. Also if stall speed is changed do you need to pick a different tq range with camshaft, or do you change stall to match with the cam? veh is 93 F250 4X4 SC w351w c6 4:10 and 235/85/16

 

A high stall TC is absolutely the worst thing you could possibly install in a vehicle used for towing, to keep transmission temps under control you want the converter locked up as much as possible not slipping more than usual.
With your combo I would think you already have more than enough engine rpm, exactly what problem are you trying to fix?

 

Trying to perk up this truck and make a tow vehicle out of it. It has no power, no MPG
6k on a reman long block. Have been learning a lot from this site, lots of good info as soon as spring rolls around and I can get back out side to work on the truck am going to adv timing and ck tune etc. vehicle runs/starts good no stumbling smooth power, attach the camper trailer on the back and vehicle has no power/mpg. Not looking for 20mpg just would like to get on the better side of 6mpg,Just purchased at the end of camping season last summer so haven't taken the time to really ring in out. any good leads? any body?

 

A tighter towing converter is always a good idea, since you are never able to lock it up with a C6. Also, matching it to the curve of the cam makes it all that more efficient. More specifics on your setup is needed. Sorry if you have it in your sig, can't read anything other than your post on my phone.

 

I'm not up on towing torque converters, could someone explain them to me, also torque converter lock-up. I was under the impression that torque converters always slipped never having a mechanical lock-up.

 

The type of torque converter in the C6 is allways slipping a little bit and from what I gather the factory stall speed is 1500-1800rpm.. though I could be wrong on that. In any event this constant slipping generates an incredible amount of heat in the transmission and heat is the enemy so you want to minimize it. I have seen reports of companies making low stall C6 converters for towing applications, a web search should turn up some results on that, and there may even be a locking converter for it now but again you'll have to look around. The other thing is the engine in your truck is smothered pretty badly, the stock exhaust is pretty restrictive and the motor really responds well to a cam swap with hugh gains in TQ and midrange power(2500-4500rpm), and you can get all that without upsetting the computer or changing anything in the fuel system. This increased power will also improve milage when not towing though the single best thing you could do for that is install an overdrive unit... though it would take a long time to recoup the costs with these things being quite expensive.