How Turboes make power

[Thy Sir Ahsan]

Ahhh ... nice discussion I see here.

Here is how turbos basically work.

They are small turbines which use your exhaust to run. These compress air ... more compressed air means more oxygen. More oxygen means more combustion (given that more fuel is provided), this results in more power.

This is the basic working of a turbo. It isnt so easy in real life.

Turbochargers AND superchargers work on the same principle. Their main difference is that turbos use ur exhaust to spin up the turbine ... the supercharger uses the crankshaft. Thus superchargers take up a bit of the power of the engine itself ... but it spins up very quickly thus works good in low revvs.

Badboy4life stated that superchargers compress air while turbos dont ... that is wrong to my knowledge. Oh and its a turbine ... not a fan!

Now Mobius' query regarding turbos getting on/off. Well ... its pretty much not possible to turn it completely off. Since when you start the engine the turbo spins ... although the wastegate solution given by badboy is pretty much the only way you can do that.

If you want some racing boost ... jus get N20 ... its safe if done properly. It wont overheat ur engine (unless you hit N20 and go into the redline zone all the time) ... as nitrogen will act as a cooling agent.

Do not turbo your car unless you can afford getting some internal work done ... either in the start or later when ur block gets weak. Especially the Honda D blocks ... those high revving blocks with stock internals dont like getting boosted that much! Turbos will increase wear and tear if you got stock internals, even on low boosts! If you want to go serious turbo, 1 bar (14psi) or above ... use the 4EFTE, 4AGZE or the CB70 motors. Since they come with turbos already ... they have much better internals to cope with the extra pressure even when you want to up the boost. Still if you want to boost your Honda ... dont go above 7-8psi if you want to run it long time.

CNG

The problem with CNG is the required compression ratio of 14. Petrol engines cant do that ... even getting close to that ratio and your engine goes bye bye!

That is the main reason CNG lacks power.