Just wondering if one changes the exhaust components such as the downpipe and exhaust, if another trip to the dyno to retune is necessary?

I currently have a 2.5" turbo back exhaust system and I'm wondering if I were to go to a full 3" turbo back, would I have to go to the dyno.

 

Not an have to but you would feel alot more gains with a tune

 

yes, or you may run lean

 

Spool up time on the turbo will change so yes you need to have it retuned.

 

Dont cheap out just tune it, its worth it.

 

yes, at least a touch up

 

A cleanup tune will be necessary . I found out for myself with my turbo integra . I changed the downpipe and it leaned out the tune by half a point . Dont take any chances or you may be sorry .

 

As long as you replace anything that changes the charactheristics of your setup, its adviceable to go to a dyno and check how the tune is standing. As stated above you will most likely only need some sort of touch up tune. Should be a quick session.

 

Yeah, it was just something I was tossing around the idea of upgrading to a full 3" exhaust some time in the future as well as possibly a couple of other things.

I just wanted to see if I would be making for than one trip, so if that's the case, I'll most likely wait until I have all the components I want to upgrade and do it in one shot.

On a different note, this may be a silly question but I wouldn't have to dyno again if I were to change my radiator would I?

 

LOL No dyno or tune redo needed from a radiator change.