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 Post subject: turbo timer question
PostPosted: Tue Oct 11, 2005 2:49 pm 
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this is a question of interest. i am looking for a tt (is anyone selling one?)
and i just read on a scooby poo forum about auto ones that calculate the idle time.
QUESTION:-
could peeps give me average times their auto timers calculate to
stay on for. on an average run from work or something.
not mr magoo driving
i would like to know what the OEM's would set as an average time in their modules.

i know its a bit ambiguos please use the power of patience.

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 Post subject:
PostPosted: Tue Oct 11, 2005 5:13 pm 
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II don't have a TT anymore. I sold mine as personally i think they are a bit faddy and a waste of money, (but then I like shiney things that others don't so don't put too much weight to my opinions!! ;))

Anyway back to the answer . . . I tend to make sure that I do some Mr Magoo driving for the last 5 - 10 mins of a journey to let the car settle and cool down after a spirited drive, or let it idle for a few mins at my destination.

TT's will let you get out of your car and get on in to work (or wherever ) whilst the engine is 'running down' however be aware that some insurance companies don't like you using them :(

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 Post subject:
PostPosted: Tue Oct 11, 2005 6:54 pm 
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i understand that i was wondering how long they used to set themselves to idle for 1 min, 2 mins. it tells you on the sun visor depending how you drive uphill/acceleration. but my hard driving is not your hard driving ( coz i am scared to floor it) so what are average times that the timer decides. let me know if you are light or heavy footed.
thanks
mahender

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 Post subject:
PostPosted: Tue Oct 11, 2005 10:53 pm 
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It is really difficult to say if i am light or heavy footed as it all depends where I am drivng, how much time i have and what mood i am in!!

However as a general rule of thumb i tend to try to leave about 5 mins 'cool down time' for an average drive (0 - 1/2 stock boost) and somewhere between 5 and 10 mins for a spirited drive (1/2 to full stock boost).

Not had any problems so far with doing this . . . touch wood!

If you buy a TT, the instructions may be better able to advise??

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 Post subject:
PostPosted: Tue Oct 11, 2005 11:34 pm 
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hmm, I am not so cautious. Typically see full boost on most runs as I enjoy it :-) I do however make the last mile or so as a cool dopwn period. If really nailing it then circa 3 mins. If the odd blast with plenty of low boost/vac driving 30-40 seconds

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 Post subject:
PostPosted: Wed Oct 12, 2005 6:31 am 
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Also be aware it is illegal to leave the car unattended with the engine running on the Highway just a point to think about.

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 Post subject:
PostPosted: Wed Oct 12, 2005 10:34 am 
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I beleive that the blitz TT (not sure about other makes) can be calibrated to your level of caution. So it can either keep the car running for 30seconds per "hoon point" or for 1 minute etc.

Don't quote me on that though. I'm going on second hand information.

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 Post subject:
PostPosted: Wed Oct 12, 2005 10:52 am 
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Location: drinking devil fuel
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Some timers can indeed be calibrated

My Apexi (the little pen style one) is hooked to the stock O2 sensor and can apparently devise engine RPM too, probably from volts

It uses this to tell how agressivly you are driving and adjusts idle time accordingly. It also gets very confused when you first start the car as the ECU runs the choke to 10:1 AFR. The TT sees this as mahooooosive boost time and after about 30 secs of running it's up to like 30 minutes of idle time LOL. Makes the trip to the petrol station quite annoying

TBH though I don't really use it that mush. It's always switched on for those dumb blond moments when exiting the car but I always drive the last few miles gently until the timer has reached it's minimum 10 second time

I also use mine for warming up/defrosting the car - set it to (say) 10mins, remove keys, manually lock the doors and walk away..........


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 Post subject:
PostPosted: Thu Oct 13, 2005 10:11 am 
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thanks boys and boys,
its mainly for the time when you sdwithch the ignition off straight awaya fter a good drive. im think oh *bleep* i forgot to leave it running.

One more question. may be corny.

If i switch my car off without idle (by mistake) after a good run. can i just switch the ignition on again and let the car idle or is damage already done?
i sommetimes do this.
thanks.

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red st185, running 10 psi all gears, powerflow cat back, and air filter. oh and fab scoop splitters


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 Post subject:
PostPosted: Thu Oct 13, 2005 10:18 am 
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Location: drinking devil fuel
Car Model: ST205
Switching it back on again is fine

The reason for the idle time is to let the turbo cool down with oil flowing round it

If you don't then the high turbo temps can actually cook the oil forming deposits both in the turbo but worse in the oil lines to/from it

If you switch the car straight back on there will not be time for this to happen so all is good again


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 Post subject:
PostPosted: Thu Oct 13, 2005 10:25 am 
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excellent no need for tt then i suppose. just sit and listen to freebird and enjoy.
thanks

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THIS IS MY 4. THERE ARE MANY OTHERS LIKE THIS ONE, BUT THIS IS MINE.
red st185, running 10 psi all gears, powerflow cat back, and air filter. oh and fab scoop splitters


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 Post subject:
PostPosted: Thu Oct 13, 2005 11:21 am 
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Am I right in thinking that when you turn the engine off straght away the temp of the turbo can actually go up before starting to cool?

Not sure of the physics of this, something to do with airflow.

I realy should stop beleiving everything I read/hear :D

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 Post subject:
PostPosted: Thu Oct 13, 2005 12:38 pm 
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Paul - yes I would've thought that the turbo temp would increase initially, as the oil drains away and the coolant in the turbo will just sit there gaining heat?

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 Post subject:
PostPosted: Thu Oct 13, 2005 3:53 pm 
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I brought a cheap turbo timer from a member on the gt4oc for about £25. Its a older model Blitz jobby. I tend to set the timer for 30 seconds for short trips and up to 5 minutes for long hard blasts. Here's the thing....

I am happy having a turbo timer fitted as its hard to judge seconds when you are desperate to get out of the car. It's always a good idea to leave a turbo running for a tad after a thrash so the oil clears. Saying that freebird is about 8 minutes long so the turbo should be void of any excess oil by the time Lynyrd Skynrd finishes twanging the strings...

They do have drawbacks too...

a. Its illegal to leave the car while its running as mentioned. They'll give you up to 3 points and a fine now I believe.

b. TT's bugger the alarm systems door activation. So you have to wait for the engine to stop anyway before you can set most alarms.


Cheers,


Tone

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 Post subject:
PostPosted: Thu Oct 13, 2005 4:16 pm 
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Joined: Thu Oct 06, 2005 4:26 pm
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Location: stockport, manjester
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thanks all.
is it a fully auto tt that will set my alarm and stuff.

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THIS IS MY 4. THERE ARE MANY OTHERS LIKE THIS ONE, BUT THIS IS MINE.
red st185, running 10 psi all gears, powerflow cat back, and air filter. oh and fab scoop splitters


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