twins???
 

i know someone that put a 64mm and 98mm as the twins on a 6.7 i am telling them this will never spool good.. am i wrong??

Just like any set up, the amount of fuel determines "spoolability". With enough fuel, it will work fine. A good daily driver? Not so much.

Please look at this thread and do the appropriate actions.
https://www.dieselbombers.com/web-si...ture-size.html

well 6.7's have a little more flow to spool them, it might not spool lightning fast but depending on the fueling mods, and tuning he has it might not be too terrible.

If their both billet wheels, than were talking LIGHTNING FAST!! Like a combination of Superman and Jesus fast.....

he doesnt have billet wheels and doesnt have enough fuel. all he has is a smarty and a custom header