OK I've been looking around everywhere and searching but I still don't know what the heck STR means? I've seen STR 2.0, 2.5, 3.0 for example just wondering what it is. Also I'm planning on getting a Vig 3200 stall, will the computer handle a 3200 stall no problem? How high of a stall will the computer handle?

 

Stall Torque Ratio... If I remember correctly. It would be best to reprogram your CPU to fully benefit though.

this might help somewhat.. Has a small section about the STR you are asking about..

http://www.tciauto.com/tech_info/tor..._explained.htm

 

As correctly stated, it stands for stall torque ratio aka torque multiplier which is a more descriptive name because that's what it is. The STR is the multiplication factor of your torque for the given torque converter. For example, if you buy a Yank ST3500 with a 2.5 STR that means at the moment your car starts to move from a dead stop, the converter will multiply your torque by 2.5. So if your car is making 375 rwtq, then it will be multiplied to 937 lb ft of torque at the instant you launch. The higher the STR, the greater the multiplication, but also the higher the STR the quicker the multiplication factor drops off and the less overall efficiency the converter will have.

My Yank SY3500 has a low STR of 1.63 (lower than stock), but the multiplication factor lasts longer down the track and it has an efficiency rating of 97%, the highest on the market.

 

also, the lower the str, the looser the car will feel when you move from a dead stop.
its gonna feel like you are towing a boat and need to give it more gas.

 

Only if you stick with the stock gearing. My SY3500/1.63 with the 3.73 gears doesn't feel loose at all.

 

Thanks for thelp guys. Also will the vig 3200 converter work fine with the mods i have in my sig? How big of a stall will the computer handle and not go funky?

 

the vig 3200 is a popular choice.
you should have a converter tune done, its costs between 100-150 bucks.

 

That converter stalls at around 3600 rpm so with your 3.73 gears it should work great.

With your '98, you're not going to run into any torque management problems. You can just install the converter and go. The only thing you will have to do, is adjust your shift points and you may end up hitting your rev limiter with the new converter. You can get this done by a tuner or buy one of the handheld programmers and do it yourself. I opt for whichever was cheaper.