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Engine Specific Info and Questions => IDI Engine => Topic started by: Smokey Eddy on April 18, 2010, 01:10:44 am
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Should i run a turbo timer?
http://www.enjukuracing.com/turbo-timer-type0-p-8252.html?osCsid=e6ea54168959f0dda19a4aabfbde3d79 (http://www.enjukuracing.com/turbo-timer-type0-p-8252.html?osCsid=e6ea54168959f0dda19a4aabfbde3d79)
anyone run one?
i'd love to have one and modify it a bit to not only keep the engine running but to turn on a fan on my oil cooler as it cycles and get it nice and cold for when it finally turns off.
i constantly get the feeling that my turbo is cooking the oil that gets left in it when i turn the car off. sometimes im in a rush and after driving the car hard to get to wheere you wanna go you don't exactly feel like sitting there letting the car idle to try and cool the oil.
I do understand and acknowledge the fact that gas engines have much higher EGT's but would it really be a bad idea?
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Has your turbo got a watercooled core and do you have the auxilary run on electric water pump? if so and its working you dont need a turbo timer
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Has your turbo got a watercooled core and do you have the auxilary run on electric water pump? if so and its working you dont need a turbo timer
No.
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What about wiring up a timer that will leave the car running for a minute or so after you take the key out? That way you can lock up and leave and it will still run and cool down.
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:D Back to bed I go. Carry on
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What about wiring up a timer that will leave the car running for a minute or so after you take the key out? That way you can lock up and leave and it will still run and cool down.
thats what a turbo timer is!
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the egts being "cool" is one thing. im talking about how hot the turbo its self is. that iron takes a long time to exchange heat tto the air
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when the turbo is hot enough to worry about, the EGT's will be high from the turbine housing and exhaust manifold radiating heat to the probe.
when I ran a turbo I would just take it easy for the last minute or so of driving(in my neighborhood, etc...) and just shut it down.
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Mmm
Also, are we missing the cool factor of a turbo timer? =P Okay i wont spend $100 on one.
I think i'd pay $40 just for the fun of wiring it up and seeing it work.
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the other reason I would not run a turbo timer is that the vw cooling system sucks(fails alot), and I would hate to leave the car running only to have it act up and overheat while I am getting a donut.
I would then have the most expensive donut on the planet, and no car to drive.
I always like to be in the car to watch the gauges in case it decides to lose oil pressure, overheat, catch fire, etc...
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Mmm yes the catching fire is problematic. which reminds me ... i need to post yet another topic :P
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Timers are pointless on diesels. G@ssers need them because their exhaust, even at idle, is very hot.
By the time you're at your parking spot your turbo is cool, there is no need to wait longer.
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Speaking of donuts,
By the time you're at your parking spot your turbo is cool, there is no need to wait longer.
So you dont think that heat soak from the manifold would keep the turbo hot, regardless of exhaust gas temps?
I know for a fact that my exhaust is still toasty after i have parked and got out, and would happily wager 87 english pence that the manifold and turbo are very hot indeed at this point in time. ???
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Speaking of donuts,
By the time you're at your parking spot your turbo is cool, there is no need to wait longer.
So you dont think that heat soak from the manifold would keep the turbo hot, regardless of exhaust gas temps?
I know for a fact that my exhaust is still toasty after i have parked and got out, and would happily wager 87 english pence that the manifold and turbo are very hot indeed at this point in time. ???
exactly my thinking.
Im sort of thinking why not cool the whole thing down to a temp you wouldn't want to normally run the car at but enough that at idle the turbo wont be spinning at any alarming rate requiring hot oil. im talking like ... down to 45C or something. And i am refering to the temp of the cast iron of the turbo.
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what you might do then is run a second temp gauge and sensor to measure the temp of the cast iron if the turbo/manifold.
a cylinder head temp sender(the kind that is installed under a spark plug) bolted on with one of the turbo to manifold bolts would give you a good reading of the temp of the casting.
run an auber gauge with the alarm set to be on until the temp drops below the preset. have the alarm power both the auber gauge on, and the fuel shutoff.
then when you shut down the car will continue to run until after the temps drop, then both the motor and gauge will shut down.
-Owen
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WITHOUT A TURBO TIMER!
OWEN YOU ARE A GENIUS!!! :D
it would trigger a relay that sends power to the rad fan, oil fan, gauge and fuel shut off. What a perfect idea.
Where can i find a guage as per what you mentioned? they aren't those like $750 ones that gee-bee uses are they?
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again, I would probably not do it as it leaves your car unattended and running for as long as it takes to cool down.
I would probably install the cylinder head probe and gauge and sit in the car watching it, and when the temp got down far enough I would shut down.
that way if something were to happen with the engine temp, oil pressure, etc... I would be there to shut it down before damage was done.
-Owen
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one day, like a young child, i hope to feel comfortable leaving my car by it's self and not worry about it breaking it's self.
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Back when I had the turbo I'd idle until the gauge was down to 250F (the lowest it goes) before shutting down. Sometimes I'd turn the ignition back on and watch the EGT gauge start climbing again, definitely heat soaked.
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auberins.com
the gauges are like $40 and the sensor should be $20 or so.
the alarm relay allows for lots of control possibilities.
-Owen
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I know my previous comment seemed a little cock sure, I just dont believe they cool that quickly. Does anybody have any real world figures for manifold and turbo temperatures in this situation?
Do all turbo timers work by keeping the engine running? Is anybody using a system that uses a secondary electronic oil pump, and merely continues to circulate the oil after shutdown? This could also be used to build oil pressure before starting.. I would do this if i could be bothered/had the time..
There has to be safety/insurance/legal issues with leaving a running vehicle unattended
Back when I had the turbo I'd idle until the gauge was down to 250F (the lowest it goes) before shutting down. Sometimes I'd turn the ignition back on and watch the EGT gauge start climbing again, definitely heat soaked.
rabbitman, how long did this take (drop to 250F) on average? Bare in mind that the gas temps will not properly reflect the manifold and turbo housing temps..
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Monkey Magic,
I know that in the praries sometimes when it was brutally cold people would do their shopping if they just needed a few things and leave the car running so it would stay warm. If that car is properly locked and what not I don't see how it would void insurance.
from a theft point of view the steering wheel would still be locked and all the doors locked. from a safety/burn down point of view ... i can see the merit there but do some insurance companies state that if you equip a turbo timer it voids isurance against fire?
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Wouldn't the best thing to check be the oil temp in the turbo oil drain line? Once the oil temp is down to a certain point you know the turbo has cooled off.
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Wouldn't the best thing to check be the oil temp in the turbo oil drain line? Once the oil temp is down to a certain point you know the turbo has cooled off.
I dunno? do you really? you could easily poor cold water into a cast iron pan that's sitting at 100 degrees, then pour it out after about 2-3 seconds and the water wont be much hotter - yes the pan will have cooled significantly.
stop the water from flowing and im sure that water will heat up in a hurry.
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that could be done as well in the same way as I stated before, but with an oil temp sender in the return line.
but I think that a CHT probe on one of the turbo to manifold bolts would give a better reading, as you are directly measuring the temp of the housing itself, not the transferred heat into another medium.
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Yes Owen that's really an excellent idea. I think i just might try that.
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but I think that a CHT probe on one of the turbo to manifold bolts would give a better reading, as you are directly measuring the temp of the housing itself, not the transferred heat into another medium.
That's probably the BEST option for sure!!