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Found this just searching around the net..........
Posted by: Tony the Tiger
As you progress into internal mods for all motor, it doesn't get any more reliable than a low boost setup with a S/C or turbo.
To make good power NA, you usually run the following basic upgrades:
- higher compression pistons (depending how high)
- more aggressive cams -- street, race, pure drag, etc...)
- better top-end parts (valvetrain, ported head, running higher redline)
- etc...
When you have bigger cams, your car will not run properly at lower RPM's usually... You will have a chance to fail your emissions. You will also have a narrower powerband in most cases. If you opted for mild street cams, the improvement is almost negligible... The choice is yours, and that choice will be based on how much you really understand the motor.
When you get into upgraded valvetrain, there will be more stress to neighbouring stock valvetrain components. Stiffer valvesprings will allow higher lift and duration cams and more redline. but they also put more stress on lifters/rockers, and more wear and tear. How much redline will you need based on your cam selection is the key... What specs of valvesprings do you want to run? Too stiff you will break things...too soft you will float your valves. This is another choice that you will need to make based on how much you know.
Power is power... once you reach a certain power level on smaller displacement motors, there is no such thing as better reliability from being all motor, or turbo, etc...... Reliability comes from how well you build the car and how well it is tuned. Forced induction seems unreliable in most cases because they make a lot more power than most all motor setups... but honestly, high engine RPM kills motors faster than anything.
My suggestion would be save up the money and rebuild your stock motor... just a fresh stock rebuild... Then buy a Rippmods supercharger and run their low boost setup. That is easily 160WHP of reliable power
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