I have a 03 raptor that is bone stock right now. I just ordered a pro circuit slip-on, K&N with outerwear, and a K&N jet kit, form rocky mountain atv. I didn't want to get the pro flow kit cause I don't really want to modify the air box. I live in near allentown pa, not really sure what the elevation is here. But anybody have ant suggestions on what jetting I should use? thanks!!!

 

I think your jet kit will have detailed instructions. the dynojet kit does.

 

Looks like we are running the same setup. Nice choice.

I'm running 146/148 with the needle one clip leaner than the dynojet instructions. I tried 144/146 as recommended by dynojet and it ran great. I tried the 146/148 combo and couldn't tell the difference between 144/146 and 146/148 so I stuck with the 146/148. My elevation is about 1200 ft.

also trim the snorkle flaps in the snorkle.

other than that, go to your local airports website and it should tell you the elevation. that would give you a good estimate, then follow the directions from dynojet.

ba01raptoraz

 

Just found out that the elevation for the city I live in is 300ft. Now does that mean I will need to go with leaner jetting of richer jetting?

 

oh yeah, and how does your pro-circuit T-4 sound? I'm expected it to be delivered next thurs. I can't wait!! I was gonna go with the White Brother E-series but the pro-circuit was a little bit cheaper.