^ Well there you go. You have a lot of variables there. That 2v engine has a stronger torque curve to begin with. My experience has been with the same truck, and the same load.

 

back in 04 when i originally dualed it- did it in 2.5, that lasted a month-dropped down to 2.25,not only did it move my tq considerably down from the 2.5" , it gained considerably , especially from the 3" siso oem, so i can say i compared aples to apples...

 

I think the bends make a bigger difference then the size of pipe. You and your buddy might have the same truck, same motor, same headers but if the pipes are not identical it will sound different.

 

When you went from 2.5 to 2.25 did ya notice any difference in sound or how loud it was?

 

i honestly can't say i noticed a sound difference, but could feel a difference when towing-imho

 

The tune will play a huge roll in how it feels also. If the truck is tuned to work with a more aggressive exhaust it will run better and be more crisp. An untuned truck with an exhaust will be good but not optimum(the tranny shifts will be sloppy, too early and weak).
An open exhaust will only hurt low low rpm. Really if you're into just gaining power for low-end then shop for a good single but you are restricted as you rev up then. It comes to what you want in sound and performance. Of course we all think we made the right decision .


Jeff

 

my tune wasn't altered one bit from where it was with the 3"siso oem tune , was datalogged on dyno when it had 2.5 then when it had 2.25-FYI

 

But if the tune was better set for one then the other it would be better??? And comparing your truck to an untuned(your words) truck is off base...


Jeff

 

i was comparing my 9000lb van to 2.5 "dualed f150- and yes i know what my ran like with 3"siso oem, 2.5 dual, then 2.25" dual which have 240k miles on it now....

 

This is what I drew from.
I'm not saying you don't lose but there's way more variables that are not considered. Gears, tire size, tune, gears in tranny(yes there is differences), hell you can even say what rims(weight??) and so on.


Jeff

 

^ exactly. I just quit arguing...

 

Ya just want facts and not popular beliefs.


Jeff

 

Hey.



Don't forget about the x-pipe.

MGD

 

Nice...

 

I Like how that pretty picture has a BFH in it.