40th Stillen Supercharger Build

spdandpwr

I don't think that it is practical, nor do I suggest that it is absolutely necessary.

Overlap of the cams profiles is the important part. You dont want overlap on a f/i car. (overlap is the length of time both the intake and exhaust valves are open at the same time.) All internal combustion motors rely on cylinder pressure. F/I cars need only one set of valves open at a time to reduce boost loss out of the exhaust.

With cams that reduce overlap, you can raise boost without worrying that it'll escape out of the exhaust valves. Additionally, you can run the car without the cat, allowing you make more power that. On other platforms, running catless with an s/c = more power.

This is by no means a knock on any of the s/c and t/c kits that are available. They work great. I'm just saying that if we had the opportunity to reduce overlap, I think that we'd be able to make even more power. I defer to the k20 civic si that is running 15lbs of boost and making 420+ hp and 29X lb ft of torque...that's impressive and he used cams to get there.