How much boost?

in article biuab2$1k4$ snipped-for-privacy@enyo.uwa.edu.au, Callan Bleechmore at snipped-for-privacy@tartarus.uwa.edu.au wrote on 01/09/2003 03:23:

IIRC 0.48 bar boost, if it's a 2.0L LPT.

Turbos take a very long time to cool down :) At least 30 seconds should do the trick - pull up, put the handbrake on, put the car into park or neutral (stick shifter), put up the windows, turn off the stereo, put on the steering lock, etc. That should be about right.

What you're doing here is allowing the turbo to spin down while oil is still being pumped by the idling engine. Turbo-chargers can still be spinning at pretty high speed even when the car is at rest and you can't hear it whistling.

Hope that answers,

Paul

Thanks Paul

Actually it's the 2.3L low pressure turbo, but i'm guessing it won't be that different.

CB

in article bj0or7$72e$ snipped-for-privacy@enyo.uwa.edu.au, Callan Bleechmore at snipped-for-privacy@tartarus.uwa.edu.au wrote on 02/09/2003 01:43:

This site seems quite a good source for 9000 specs:

Paul

Is that assuming you were hot-rodding it into your parking spot? What if you drive reasonably sedately into the garage or parking spot -- has the turbo already had a chance to spin down? Or does it have to be *idling*?

Gary

I quite agree with all that. When the engine is switched off, the oil supply to the turbo is also cut, so there is only so much oil left. A hot and fast spinning turbo may run dry. When the engine is started up again oil will not immediately flow into the turbo; it relies for a short while on the leftover oil.

Yep. I pretty much do all the things I need to do before I get out before I switch off (annoyed the missus who likes to switch off straight away, no matter how fast she has been driving) until I explained why it is advisable for almost any car, and essential for a turbo.

And when starting up, I try not to exceed 3k revs (actually about 30 in second while accelerating, useful for getting to speed in town) until I see the needle touch the bottom of the green section, and don't fully welly it through the gears until the needle is comfortabley in the green.