Turbo Timers

[boogz]

I'm going back to my hoon car days (Liberty RS, TX3 4WD, Lancer EVOIII) but does anyone use turbo timers anymore? I suppose my car doesn't warrant one with a teeny tiny turbo... But anywhere from 15-18psi boost you'd think it would heat up a fair whack?

[gavs]

These cars generally run an oil pump that continues pumping oil through the turbo to cool it down after shutdown.

[Martin]

The oil pump also ensures oil trapped in the turbo oil ways does not sit and burn from the hot turbo temperatures
So continued oil pumping is benficial for both the turbo and the oil

I've been wondering about this
I coast home for the last few km trying to avoid boost
I avoid short trips (use the wife's Mazda instead)

When I left the Marulan track and entered the pit area, I let the car idle for a few minutes
Many others were doing this and also opening the bonnet to let the hot air out of the engine bay

[Mysticality]

I always let mine sit and run if I'm working it hard (track, long runs between cities, etc) but the turbo doesn't get *that* hot, really.

I measured it after 4 laps at the track and the hottest reading I could get was 350^C, oil temp on the dash was up to 118^C.
The hottest I saw the oil temp at was 120^C, and it never went higher. I'm thinking some sort of regulation system kicked in, which would make sense as it wasn't a particularly warm day so the cooling system would in theory have some headroom still left to work with.
Water temp spiked at 104, then cruised at 100-102 and never exceeded.

[boogz]

http://en.m.wikipedia.org/wiki/Turbo_timer

[h100vw]

There's an electric water pump but I am pretty sure there's no oil pump fellas.

Gavin

[Mysticality]

Turbo timer - Wikipedia, the free encyclopedia

I know, but I was saying that it doesn't get all THAT hot in the first place.
At least, from what I've measured!!

Although turbo timers are pretty cool... Especially on TD42's or 1HZ's

[Guest001]

Although turbo timers are pretty cool... Especially on TD42's or 1HZ's




With your reference to 1 HZ's I presume you are talking about Toyota motors which incidentally were a non turbo motor in standard form

I had a 1 HD FTE 4.2 TD and had an EGT gauge on it The probe was in the dump pipe and it ran at about 375C normally and when towing up a hill the highest it got was 515C So to say a turbo doesnt get "that hot" wold be a misnomer in my experience.
According to those in the know on the LCOOL toyota forum the cylinder temp was about 200C above the dump temp so I had a timer that ran for a minute to allow the oil and turbo to cool down.
It was reckoned that pistons may start to melt around the 850C mark but I wasnt game to try for that sort of temp.

It is actually illegal in Qld to leave a car running if unattended but I left mine when a cop was nearby and he didnt say anything.

[zei20t]

water cooled turbos don't need turbo timers.

IMO they are a waste. if you've been fanging your car, take it easy for the last few min before you get home.

ive owned many turbocharged cars, NEVER had a turbo die using the above method. actually, never had a turbo die

[K1W1]

Not sure about other states but it is illegal to leave a vehicle running and locked with nobody in control (ie in the drivers seat) in Victoria.
Unless you want to sit in your car and wait for the timer to shut the engine down legally at least you can't use them and never have been able to.

Having said that timers go back to the days of air cooled bolt on accessory turbos. On modern water cooled factory fitted turbos there is no need for them as the cars cooling system will continue to run or will actually start and cool the turbo if it has to.