how many of you actually let your engine tick over for a min or so after a drive to protect your turbo???

It depends on the journey. If I pull off a motorway and immediately stop, I'll let it idle for a couple of minutes. However, if I'm arriving back home, I'll try to keep the revs down for the last couple of miles, and only let it idle for 10 seconds or so before switching it off.

If the engine and turbo have already had a chance to cool down, I don't think you need to worry so much.

when coming to the end of my Journey I always take it easy for the last few minutes.

Heebees plan is a good one, if youve been driving hard then other components including the brakes will benefit from cooling down before you stop

usually take it easy for last few minutes then let it tick over for 20-30 secs or so before swiching off. didn't when i hd my octy vRS company car though

I let mine cool down on the road up - keep the boost gauge under 0 bar, and wait a minute

Simmer the turbo so oil is still pumping around it and it doesnt stop whilst dry.

I do on track days. Other times I don't bother.

I let mine cool down on the road up - keep the boost gauge under 0 bar' date=' and wait a minute

Simmer the turbo so oil is still pumping around it and it doesnt stop whilst dry.[/quote']

Are you suggesting there are times when NO oil is pumping round it? Surely it would go BANG! if such were the case ...

Are you suggesting there are times when NO oil is pumping round it? Surely it would go BANG! if such were the case ...

It would certainly get a little warm Anyone know how hot the diesel turbo's get compared to a petrol turbo? When I had the Scooby there were warnings everywhere saying to let the car idle after highway driving before switching the engine off. I don't recall seeing any similar warnings in my Fabia manual, but then my Fabia isn't a sporty one

Chris

It would certainly get a little warm Anyone know how hot the diesel turbo's get compared to a petrol turbo? When I had the Scooby there were warnings everywhere saying to let the car idle after highway driving before switching the engine off. I don't recall seeing any similar warnings in my Fabia manual' date=' but then my Fabia isn't a sporty one

Chris[/quote']

Spot on Chris, diesel turbo's don't run as hot as petrol turbo's IIRC they are more thermally efficient.

Spot on Chris, diesel turbo's don't run as hot as petrol turbo's IIRC they are more thermally efficient.

Really? Thought they both ran at the same temperature, as the heat is from the compression of the air charge over the fins?

It's the engine itself which is more thermally efficient, not the turbo...

Rob.

Nick - dry to an extent. Its not no oil pumping around, but substantially less than if you were to let it spin down naturally.

Rob sounds about right, i'm sure its the air friction causing more heat rather than the thermodynamics of the engine.

Really? Thought they both ran at the same temperature' date=' as the heat is from the compression of the air charge over the fins?

It's the engine itself which is more thermally efficient, not the turbo...

[/quote']

Well I wondered if it was the diesel turbo which would run hotter as the turbo is designed to spin up earlier in the rev range to boost low-down grunt. This would mean on a petrol car at 70mph, it would be feasible that the turbo was doing very little, if any, work? Or have I got the wrong end of a stick?

Chris

I sit in mine for a minute or 2 when i start up and take it easy coming into my road then let it cool down for a mo when i stop

Well I wondered if it was the diesel turbo which would run hotter as the turbo is designed to spin up earlier in the rev range to boost low-down grunt.

Guess it could well be the case - would vary from car to car though, depending on where the turbo kicked in. Suppose it would also mean that small turbos would run hotter than larger ones, unless the higher air compression of the large turbo would compensate...

Either way, I know you can get the turbo on the Octy vRS to glow if you try hard enough.

Rob.

Really? Thought they both ran at the same temperature' date=' as the heat is from the compression of the air charge over the fins?

It's the engine itself which is more thermally efficient, not the turbo...

Rob.[/quote']

I'll speak to Ross to find out but I was lead to believe they don't run as hot.

Really? Thought they both ran at the same temperature' date=' as the heat is from the compression of the air charge over the fins?

It's the engine itself which is more thermally efficient, not the turbo...

Rob.[/quote']

Just found these figures so there is an overlap

650

still hotter than gas mark 6 though

still hotter than gas mark 6 though

## Churchill Dog mode on ##

Ahhhh Yessss

## Churchill God mode off ##

I sit in mine for a minute or 2 when i start up and take it easy coming into my road then let it cool down for a mo when i stop

What good does that do?

I think you need to read the TDI FAQ mate... the car will not warm up AT ALL if its just idling, so all you are doing is wasting diesel.

Just found these figures so there is an overlap

650

http://www.steves.co.za/Intercoolers.html

Normally I idle it for a short while after stopping - normally the time taken to stop, gather up any bits, and put my glasses in the shelf. I also try my best to keep the boost to a minimum in the latter part of my journey - same on outward journies when its cold. I think as long as its left for a short while it'll be OK - I think two minutes is a little excessive.

Paul - it will however give it sufficient time to get at least some oil around the turbo

[url']http://www.steves.co.za/Intercoolers.html[/url]

Ah, right...yes, the exhaust gas temperatures would be lower with the diesel being more thermally efficient.

Thought we were talking intake temperatures...

Rob.