I jsut purchased and installed the screamin eagle heavy breather cone filter intake for my 08 roadglide. I already had installed the stage 1 intake kit. After I installed the cone kit. My oil pressure jumped to 50 to 55 when on the throttle. Normally before it would it be at 30 to 35 and drop to 5 to 10 at idle. I cleaned all the bolts and made sure there were no clogs especially in the breather bolts that bolt into the heads. At one point I did get a backfire on a test ride. A buddy of mine suggest that my motor is running to lean and that woudl be the cause of the backfire. Would this also be a result of the oil pressure going up? The instruction do indicate that the bike needs to be retuned when installing the cone intake. The guy at Harley said that since I already ahd the stage 1 kit it wouldn't be necessary (yeah right). I put my stage 1 kit back oin the bike and it went back to normal with the normal ranges. Does running the bike leaner increase the oil pressure, and is remapping the EFI is all that is needed since I am now putting more air in the fuel mixture? If anyone has some stories to share on knows about this I'd love to here what I need to do. Thanks

I've already done the download for my pipes and intakes. At the time the intake was the stage 1 kit, I am now adding the heavy breather cone intake.

 

If you already had a stage 1 intake and then installed a heavy breather that is what caused the jump in oil pressure. The stage 1 intake and the heavy breather use different bolts for crankcase venting, the heavy breather uses the stock intake crankcase vent bolts. If you used the ones from the stage 1 kit with the heavy breather I believe you don't have any crankcase venting.

 

Hammer on nail head....(Yep, he's correct).

 

He'll yaa