1.7 rockers with 380HP Cam

It’s more of the cylinder head not being able to flow more air with the higher lift than the cam itself.

Also, with the cam, 273 does have a good point about the cam. Thanks don’t know how that 360/380 cam is ground. How aggressive are the lobes? Just because it is a kid lift cam doesn’t mean the lobes are lame! While the being think there a “Race Lobe” cam since bracket racers did well with them, a spec ground cam, can certainly kick some ***.