
Must be some good s--t you're smokin up there
you can say what you want. I have seen the dyno, I have seen the weight it can pull. I have even run heavy loads with him out to California so I know what he was getting for mileage (6.3 compared to my 4.9 for a well permitted GW of 102,500 lbs) I have seen the 5x4 duplex with the 2spd splitter behind it.
for what he does 102,500 is light because his trailer weighs that much empty when he has it all hooked up...... when that truck works he has to be escorted and his truck will move over 300,000 pounds with out a push truck......
say what you want, I have seen it....... just a custom tune and a cam bump........ 9 years worth of custom tuning.
now granted a tractor's computers are a bit more sophisticated but 500 rwhp out of a DOHC 5.4L is possible with just a tune.
while I am at it .... there is a Duramax running around Holland MI that makes 1200 RWHP on fuel only.... no drugs.