v10cla

Can someone enlighten me as to why normal turbos only seem to operate under 'load'.

I mean, with a normal set up when you rev the car at standstill, does the turbo spin up?

tath

turbos are span by gasses passing through them. no load = low gasflow.

http://auto.howstuffworks.com/turbo.htm

v10cla

Cheers..........I think!

Trems

Imagine it like this, when you load the engine up you are simply opening the throttle to allow more air into the engine, more air (and obviously fuel) in each cylinder means bigger bang and more air coming out through the turbo....in very simple terms!

[Davey]

Stick one of those ornimental fans by your exhuast pipe.. Not much action at idle... now take it up to a couple of thousand rpm and it will be spinning pretty damn fast..

This is very much how a turbo works, but there are two fans, one is being blown by the exhaust causes and the other (connect to it by a shaft) is blowing (or compressing) the inlet gasses..

On full boost the turbo impeller will be spinning at about 50,000rpm so as you can imagine lots of exhaust gasses are required

New_scooby_04

iTrader: (4)

Ok.........................



Damn it!! The vibrations caused by the fan just broke my MAF!!!!!

Ns04

[Davey]

What you didnt try that without a FanLink did you??

davedipster

no load means no vacuum, so little boost even if you sit out of gear with max revs.
I think anti-lag gets around this but no sure how.

DaveD

iTrader: (2)

If you rev the engine in neutral, you are only just touching the throttle - hence not much air is flowing into the engine, and not much gas is passing through the turbo.

When the car is under load, you can apply full throttle, and hence more air/gas is flowing. The engine easily produces too much gas for the turbo under full throttle conditions, and so some of it needs to be bled off (by-passes the turbo by the wastegate) to keep the pressure going into the enigne to sensible levels.

Trems

Not strictly true mate, vacuum doesnt effect the level of boost the turbo produces, its the airflow through the exhaust housing.