Turbo Timer - required or not?

[darkhorse1210]

This is one I've heard mixed opinions on and would be keen to know what the majority on this forum have to say on it.

When I bought my RS2 earlier this year a good friend of mine (who's a fountain of knowledge on all things performance car related) suggested I get a turbo timer fitted to the RS2 to alllow the turbo to cool down.

However when I supplied my specialist with the turbo timer to be fitted he told me that it wasn't necessary. He's a UR Quattro owner and was adamant that the timer was not required on these engines.

Can anyone offer any advice?

[DickyC]

The turbo on the RS2 was made by the people who did Stonehenge plus I believe there is a 'run on' oil pump which would operate after the ignition is switched off if it was hot enough. It never came on during my two years of RS2ing. Quite what you would have had to do to get it run is anyone's guess.

Either don't give it another thought or, for a nice bit of mechanical sympathy, ease up a bit for the last mile before you stop.

[alastairg]

You do not need a timer......next

[trevithick]

The turbo on the RS2 was made by the people who did Stonehenge plus I believe there is a 'run on' oil pump which would operate after the ignition is switched off if it was hot enough. It never came on during my two years of RS2ing. Quite what you would have had to do to get it run is anyone's guess.

Either don't give it another thought or, for a nice bit of mechanical sympathy, ease up a bit for the last mile before you stop.

And it does work!
T

[DickyC]

The turbo on the RS2 was made by the people who did Stonehenge plus I believe there is a 'run on' oil pump which would operate after the ignition is switched off if it was hot enough. It never came on during my two years of RS2ing. Quite what you would have had to do to get it run is anyone's guess.

Either don't give it another thought or, for a nice bit of mechanical sympathy, ease up a bit for the last mile before you stop.

And it does work!
T

I won't want it back if you thrash it

[AlWyn]

@ Tom no need for a tt on the RS2
o t @ Dicky yep hes looking after her well...are you at BMW PH on the 1st?
o t @ Mark another long PH run for the old girl then?

[DickyC]

Sorry Darkhorse, we've hijacked your thread!

Al, I'm going to the Breakfast Club on the 1st and back via Brighton for the Veteran car run stragglers. We will get together though.

[darkhorse1210]

Cheers for the advice Dicky C, that puts my mind at ease, much appreciated.

[trevithick]

@ Tom no need for a tt on the RS2
o t @ Dicky yep hes looking after her well...are you at BMW PH on the 1st?
o t @ Mark another long PH run for the old girl then?

Just done 550 miles this weekend, trip around the Black mountains etc, so another little trip to BMW should fit the schedule fine.
T

[VaudiGR]

there is a secondary pump,but not to pump oil around the turbo, but coolant. RS2 turbo is oil and water cooled.There is an electric pump behind the mani radiator which directs coolant around the turbo and motor to cool things off once you have turned the engine off. It is moderated by a temperature sensor on the water collector which audi used 110C to turn on, and 90C to turn off. So if you turn your ignition off and go away, if the engine's coolant goes to 110C the pump will turn on and circulate the coolant,around the engine and turbo.

However on colder climates as you can understand this never happens because only rarely the engine will reach this temperature.On my car, i like to play it safe and i dont like high temperatures, so i replaced this sensor with another one that uses 95/85 degrees(or 90/80) so that as soon as the engine goes to 90 degrees once it is off, the pump starts to work and drops it down to 80. This may happen several times with the engine off, keeping temps below 90C on the coolant.

I would suggest that you change that sensor for longevity reasons. This is why you dont need a turbo timer on these cars.

It may have a role if you used an oil cooled turbo only,in which case the pump would not circulate anything around the turbo, but then again if you drive casualy for the last 5 min before you stop, you should be ok.

Another problem with turbotimers on these cars is the fact that in order for the timer to work, you need to have the car on neutral when parking it, which RS2s dont like to be 'just in neutral' with those crappy handbrakes that they have. Would you risk it?

[trevithick]

Have you got the part number for the 90/80 sensor ? That sounds like a sensible mod.
I've got to think of long term care as DickyC won't forgive me if I break it (I know it works because when you switch the ignition on it starts for a few seconds and pumps water into the header tank, so na ).
Cheers Dudes
T

[DickyC]

I know it works because when you switch the ignition on it starts for a few seconds and pumps water into the header tank

Those crafty Germans pinched that system straight from the Puffing Devil. Whatever next?

[VaudiGR]

unfortunatelly i dont remember it! i forgot to write it down when we installed it. it is probably easily found from a different model as it is a simple thermal switch, but i will try and see if i can make out the part number

[venetors2]

Volkswagen part no it's 281 919 521 B
That's what I put on mine (got the info from S2 Forum)
Operating temps are 90° on 75° off

You need to change the plug in order to mount this switch thoug

Stefano