I had the pro series 258 multi-disc. Actually had trouble blowing through it over 15 psi. I'm not bad-mouthing it just the weight of the truck and the power.....I reached its limit. I sent it back they changed some things and it didn't improve. So we put it in another car and pro torque is building me one

 

 

Here's a video of my truck racing on ice. Best pass was 7.11 at 95 1/8 mile
https://m.facebook.com/story.php?sto...00000881137103

 

4x4 block removed
285/50R20 summers on Boss 330s
275/55R20 winters on avalanche wheels

 

Just a stock 5.3/4L60E/3.23 with a mild tune and 2" lowering shackles.

Nothing exotic or fancy, but thanks for the compliments.

 

Same problem I had a ways back. Converter was as tight as they could make. Never got to lock the converter with the big turbo before busting but when I was running high 10s I saw a 2-3 tenth reduction by locking at 100 mph.