These performance boxes like the bully dog 600 box for the cummins 600, correct me if I'm wrong but these mess with the duration of the fuel pulse right???? So, they ought to make the engine a little louder, right??? and do they help your fuel mileage???

 

Duration does not help fuel mileage...IMHO.

 

I had the VA duration box and it didn't help mileage. Typically they run very hot, fyi.

 

Boxes change timings so therfore it will increase or decrease cylinder pressures so if it increases then the cylinder pressure will be higher and the temp will be higher. Decrease pressure cylinder temp will lower.

 

so wont they make the engine louder!??!

 

I think it would. But dont take my word for it.

 

My volumizer make a little more noise in 60 and 100 hp but it is still very quiet.