Tyler_PinkertonZ28

iTrader: (1)

I have yet another converter question:

When it comes to STR is it better to have a higher or lower number? I know that the higher the STR the higher the amount of torque is, but is that necessarily the best for a street car? The reason I ask is I am stuck between two converters both of which are 3600 stalls but one has a STR of 1.86 while the other has a STR of 2.5.

skat

iTrader: (3)

I have a 2.16 STR. Mods and power in sig. I love mine but wish I had went a little mote aggressive.

Tyler_PinkertonZ28

iTrader: (1)

How does it feel on the road? Does it take a lot of gas to get moving?

Jays_SSZ28

iTrader: (2)

A high STR is going to require more RPM to get the car moving while driving the car normally. A low STR is going to move the car with less RPM.

Tyler_PinkertonZ28

iTrader: (1)

ok, so the lower is better as far as getting the car to move, but the higher is better as far as the amount of torque on the ground. Do I have that right?

Jays_SSZ28

iTrader: (2)

Yes, with a high STR it'll blow the tires off easier but it might get old street driving at a higher rpm at a low mph.

There might be more to it. My converter builder told me about pump (impellar) fin exit angle and stator blade count and fin angle.

The way I understand it the stator has the most effect on STR and converter feel as far as tight or loose, and pump fin exit angle will fine tune that feel. I may be wrong on this but I watched him restall my converter with a different stator and pump with a positive fin angle and it went from too loose to just right.

If you're into cutting open junk converters you can use this chart to get a better idea of whats what. http://www.sonnax.info/announcements/STALLCHART.pdf

Tyler_PinkertonZ28

iTrader: (1)

Ok, i figured it was more complicated than i thought. haha. What kind of stall do you run?

Jays_SSZ28

iTrader: (2)

The front half of a xxxx and the rear half of an xxxx yup... 3500 with a 2.1 STR, IIRC.

Tyler_PinkertonZ28

iTrader: (1)

haha. gotcha. I still don't know which converter I want to go with. I'll probably just do the higher STR, just to be more fun.