Porting

In general, head porting does not affect compression. Porting the head usually means enlarging the intake and exhaust runners, that's it. However, some porters "work" the combustion chamber, removing material for whatever reason. This will lower the compression.
Porting

Should I port and polish my head?

For those of you who don't know, porting and polishing your heads is beneficial for power and efficiency of the engine. In a lot of cases, because of the increased CFM of the heads, as much as 30 horsepower is typical with good port work. Porting the heads will definitely help airflow. You will gain 25 HP over the stock setup.

racing head chambers

What does porting an intake mean?

Cylinder head porting refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve their air flow. Does porting heads make a difference? If you really want to see gains, be prepared to put in some hours with your car. Porting your cylinder head is a car modification you can make to improve performance. It's hands-down the best upgrade you can perform for the least amount of money.

Porting

Does port and polish add HP?

In fact, a good port and polish job adds an additional 10 percent in both horsepower and in fuel economy, so it's worth it. Start by cleaning the ports and then painting them with layout fluid. Place the high-performance intake manifold gaskets and exhaust gaskets in place and secure them with the bolts or nuts.

Superchargers

Do superchargers ruin engines?

Assuming a properly tuned system, proper oil change and engine maintenance, and similar driving, supercharging generally will not shorten the life of an engine, just as is the case with OEM turbocharging.

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