just wondering

[mikey8865]

has anybody took the dpf/cat delete off with the spartan tune and dynoed it and what numbers...and did you then put just the dpf pipe delete and leave the cat on and dyno it....a guy told me he lost power when he took the cat off just getting everybodys opinion

[08stroker250]

I don't see how someone could make less power with better air flow. He probably lost power because he didn't reload his tune. The ECM on these trucks have adaptive learning causing the power to decrease overtime. If you don't reload the tune right before the dyno run the numbers won't be at full potential. I highly doubt your buddy lost power by increasing airflow....that makes no sense to me

[mikey8865]

ya bc im wanting to order the stuff as soon as i sell my old truck and i cant decide on what pipe to use...i just didn't know which one was better for horsepower

[08stroker250]

Originally Posted by mikey8865

ya bc im wanting to order the stuff as soon as i sell my old truck and i cant decide on what pipe to use...i just didn't know which one was better for horsepower

The full delete from the downpipe back is going to give you better airflow, but I doubt it will provide more power, atleast not a noticeable amount. You won't get any real sound increase unless you delete the DPF and Cat though...

[AED F250]

Originally Posted by 08stroker250

I don't see how someone could make less power with better air flow. He probably lost power because he didn't reload his tune. The ECM on these trucks have adaptive learning causing the power to decrease overtime. If you don't reload the tune right before the dyno run the numbers won't be at full potential. I highly doubt your buddy lost power by increasing airflow....that makes no sense to me

So would the standard disconnection of the batteries for 20 minutes clear this adaptive learning like on a Ford car, or is it permenantly stored until the computer is reflashed/dtc cleared?

Could explain why I have LOST power from my cat back and S&B!

[08stroker250]

Originally Posted by AED F250

So would the standard disconnection of the batteries for 20 minutes clear this adaptive learning like on a Ford car, or is it permenantly stored until the computer is reflashed/dtc cleared?

Could explain why I have LOST power from my cat back and S&B!

It has to be fixed through tuning.....which is something that Matt is trying to fix

[07SGT4578]

To me, it was worth buying the cat delete too just so I dont have to mess with the damn dpf gasket.

[smotrs]

Originally Posted by 07SGT4578

To me, it was worth buying the cat delete too just so I dont have to mess with the damn dpf gasket.

I've also heard it's an easier uninstall/install by removing both at the same time as one piece rather then as two pieces.