Hey what's up ? At what point as we add performance things to our trucks do most people start thinking about getting a tuner and tune .My truck has a 2 size lower crank pulley upgrade , A oil separator , headers and exhaust out the back , cone filter and a performance intercooler .This is all new to me I usually miss with the big block stuff. I guess I should do the boost bypass

 

I would have with the pulley.

 

I agree with jeff.

 

Most people will add a custom tune when they add a 4lb pulley or higher. You don't need a custom tune when adding a 4lb pulley, but if you want to wring more power from the upgrade, then it is suggested.

Anything more than a 4lb pulley and you do need a tune in order to make sure the MAF is properly calibrated for the extra boost. It's not needed with a 4lb pulley because the fueling and MAF tuning from the factory can easily adapt to the extra boost.

That doesn't tell us how much extra boost the pulley provides. Plus, crank pulley's get bigger to provide boost, not smaller/lower.

None of those mods provides any power for your truck, the pulley does, but nothing else.

Stewart

 

OK thanks. That what I was thinking to .The lower pulley is a metro size 8 ,I think . U would think with that added boost the truck would do a straight line burnout from a dead stop , around a corner it will .My other 3 cars with 400 plus hp will , and a figured a truck with no *** end weight should fry them.

 

I agree with Jeff and Chief.