Turbo cams vs regular?

adamhoud said:

So what really is the difference, like I see BC makes turbo and non turbo cams for most cars, they are the same price.

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projectprelude said:

i think the turbo cam will allow you to run a lower comp. and the other will make for higher comp? thats what i would say(without really knowing)

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gesundlich said:

Turbo cams typically have less overlap. Basically, a turbo cam is set up to maximize cylinder filling (by raising the intake valve lift/duration which allows more compressed intake air into the cylinder). This is done my ensuring the exhaust valve is closed/or almost closed on the intake stroke of the piston. If the cam allowed for significant overlap (i.e. exhaust valve open during the intake stroke), the pressurized air would simply go right out the exhaust valve, as it is under positive pressure, and not vacuum (like it is in a non-forced induction motor).

On non-forced induction engines, overlap is commonly employed to take advantage of "cylinder scavening". Basically, when the intake stroke begins, the exhaust valve is held open which allows some of the intake charge to be "vacuumed" out of the exhaust port by the exiting, combusted gases. This actually helps optimize cylider filling (at the expense of increased pollution which is why car manufacturers don't do this and why aftermarket cams typically increase power and make your car fail emissions).

Of course, ignition and exhaust cam timing/advance/retard factor heavily into the equation, too. Custom tuning MUST be done in order to maximize the gains of a specific cam.

Cams have nothing to do with compression. That's determined by the piston crowns and combustion chamber volume.

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thoughtshewas18 said:

so running I/H/E and N/A cams how will my car run? Along with a reflash/tune... I want it to be fast but not too obnoxious Would cams be worth the $?

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