From the Yank website:

"A higher stall converter will be "looser" than a stock converter. Looseness refers to the fact that the converter slips the engine into a higher rpm. The use of higher rpms helps provide greater torque during full throttle acceleration, but it also causes the engine to use higher rpms at part throttle too. Looseness can be demonstrated by comparing the typical in town rpms used by a stock converter and a performance converter. The table below demonstrates the range of looseness.

Stock 1600: 1600 - 2000 part throttle rpm range

Thruster 2800: 1800 - 2200 part throttle rpm range

SuperYank 3500: 2000 - 2500 part throttle rpm range

Pro Thruster 4000/4400: 2500 - 3000 part throttle rpm range

The stock converter requires the least amount of throttle input and will accelerate at lower rpms. The Thruster 2800 is nearly as tight as stock, requiring only slightly higher rpms. The SuperYank 3500 is looser. While under light throttle the car can be driven at below 2,000 rpms, most drivers will be using 2,000+ rpm until lock up. Once the converter locks up (typically 35 - 40 mph), the rpms will drop off to the exact same rpms as the stock unit. The 9" Thruster Pro is the loosest, but provides tremendous gains at the track. Note that the rpm range used in the above example was for a car with 3.23 gears. A car with 2.73s would use higher rpms, while 3.73s would require lower rpms.

Looseness is mostly a perception issue. Because the car uses higher rpms, the exhaust note is more pronounced. Cars with loud aftermarket exhausts will definitely notice the increase in exhaust volume, while cars with quiet systems will notice only a small change. Looseness can reduce the feeling of snappy part throttle acceleration. This sensation is primarily due to the fact that a larger throttle input is required."
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Once the converter locks and assuming it doesn't accidently unlock, it should feel the same as the stock one. Of course when you floor it, it will unlock, slip up to the stall speed ,multiply torque and remind you of why you bought it in the first place.

<small>[ April 24, 2002, 03:18 PM: Message edited by: 2K1_4mula ]</small>

 

thanks alot 2K1_4mula that really cleared things up for me

 

when someone adds a torque converter and the say the car drives "loose". What does this term mean.

 

Think if you kinda loosened up the throttle linkage, so it didn't respond like stock. Kinda like some old cars, trucks, and tractors have really loose steering and you really had to turn the steering wheel to move the wheels. Now think about the accelerator being loose. With the converter, you've got to make a bigger foot movement just to get going with traffic, and its going to show more rpms, and its going to be louder.

On the other hand when you floor it, the rpms are going to skyrocket up real fast, because the coupling between the engine and the transmission is "loose" <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />

J.
4200 stall daily driver

 

Hmmm...I know what loose means, but now after reading all of that mumble I don't know anymore. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

Excellent posts. I learned alot. I thank everyone.

 

Loose means your car will not move if you take your foot off the brakes at a stop light.
Loose means your car will roll backwards even on a very slight incline if you take your foot off the gas.
Loose means you can roll forward down a hill if you take your foot off the gas while reversing.

Leo

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by pedaltothemetal:
<strong>
Loose means your car will not move if you take your foot off the brakes at a stop light.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I guess my 4200 isn't loose. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Probably at the stock idle of 550, that would be true for me.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ragtop 99:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by pedaltothemetal:
<strong>
Loose means your car will not move if you take your foot off the brakes at a stop light.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I guess my 4200 isn't loose. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Probably at the stock idle of 550, that would be true for me.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Guess you must have raised your stock idle with LS1 Edit. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Leo