Changed headers and collector, should I change the Power Commander map

[Rufus]

Hi,
I have Campbell exhausts with the stock headers and collector and there was a map for the combo in the PCIII, all good.
Now I'm fitting the same Campbell slip-ons with Delkevic headers and collector.
The question is, should I change the fuel mapping and if so to what?
Thanks

[T 24]

Every change need own adjustment. If you dont have a wide band lambda in your bike ( and you can use the information of it), you should visit in dyno and get your bike remapped to get the best result of your changes ( and to avoid engie damage).

[gsxbarmy]

I agree with T 24 - with new (bigger) headers then you need to get your map adjusted. To be honest your current map is unlikely to be far out and just need tweaking - but to get the fuelling right then you need to get it checked as with bigger headers the engine will breathe easier thus the mixture could be slightly weak.

[Celtic32]

Sorry to skew this topic slightly, but out of interest, what sort of improvements does changing the collectors etc have to ones with a larger diameter?

[seth]

standard down pipes are double skinned
k2-k4 (twin can models) are slightly narrower than k5-k7 (single can model )
after market downpipes are single skinned so flow more gas that why you need to remap if you are already have a power commander .

[VladTepes]

Rufus - Yes. 

[Rufus]

Thanks guys, I know someone who has a dyno so I'll take it for a spin there. Will be interesting to see if the new exhaust has freed any horsepowers.