| Author | Topic |
|---|
Location:
Melbourne
Registered:
June 2004
|
|
Re: turbo timer on a supercharged car?
|
Fri, 16 July 2004 01:23
 
|
 |
Hot Turbo's need their cool-down to keep fresh oil circulating at pressure through their bearings, cooling things down enough so that they contract back near their normal size and don't "grab" when the engine (and oil) is shut-off. Both journal-type and ball-bearing'd turbos will eat bearings for breakfast if they're shut off hot. We had a Saab TurboDiesel at work that was running an uphill 1/4 mile at 100% throttle, stopping, getting turned off, then restarted immediately to run ANOTHER 1/4 mile up the hill. And the engineers wondered why it ate 3 turbos!!!!!!!
That red-hot exhaust wheel needs to cool slowly too, so that it doesn't become brittle over time, and Shatter!! N/A engines appreciate a good cool-down idle after hard work, as it lets the heat soak out of the cylinders into the oil + water jacket, instead of sitting in the pistons while the block cools down, shrinking around them. I believe the bearing journals enjoy sweet, nourishing, cooling oil running gently through them during this period, to a lesser extent.
|
|
|
| | Subject | Poster | Date |
|---|
 |
turbo timer on a supercharged car?
|
chrisellis | Wed, 14 July 2004 12:41 |
|
Re: turbo timer on a supercharged car?
|
Nark | Wed, 14 July 2004 12:44 |
|
Re: turbo timer on a supercharged car?
|
chrisellis | Wed, 14 July 2004 12:48 |
|
Re: turbo timer on a supercharged car?
|
Rolla Boy | Wed, 14 July 2004 13:17 |
|
Re: turbo timer on a supercharged car?
|
Jag7799 | Thu, 15 July 2004 00:46 |
|
Re: turbo timer on a supercharged car?
|
Chris Davey | Thu, 15 July 2004 01:46 |
|
Re: turbo timer on a supercharged car?
|
Soarer | Thu, 15 July 2004 04:15 |
|
Re: turbo timer on a supercharged car?
|
Bugman | Thu, 15 July 2004 05:29 |
|
Re: turbo timer on a supercharged car?
|
Norbie | Thu, 15 July 2004 06:30 |
|
Re: turbo timer on a supercharged car?
|
John K | Thu, 15 July 2004 07:40 |
|
Re: turbo timer on a supercharged car?
|
EVOSTi | Thu, 15 July 2004 09:23 |
|
Re: turbo timer on a supercharged car?
|
Spanktown | Thu, 15 July 2004 09:57 |
|
Re: turbo timer on a supercharged car?
|
Nark | Thu, 15 July 2004 13:16 |
|
Re: turbo timer on a supercharged car?
|
Mx73_LuXoBarge | Thu, 15 July 2004 16:27 |
|
Re: turbo timer on a supercharged car?
|
old_mr2 | Thu, 15 July 2004 15:01 |
|
Re: turbo timer on a supercharged car?
|
Shraka | Thu, 15 July 2004 15:36 |
|
Re: turbo timer on a supercharged car?
|
chrisellis | Thu, 15 July 2004 22:25 |
|
Re: turbo timer on a supercharged car?
|
Norbie | Fri, 16 July 2004 00:03 |
|
Re: turbo timer on a supercharged car?
|
Nark | Fri, 16 July 2004 01:09 |
|
Re: turbo timer on a supercharged car?
|
st184 sillycar | Fri, 16 July 2004 01:23 |
|
Re: turbo timer on a supercharged car?
|
Norbie | Fri, 16 July 2004 01:45 |
|
Re: turbo timer on a supercharged car?
|
Jag7799 | Fri, 16 July 2004 01:51 |
|
Re: turbo timer on a supercharged car?
|
Norbie | Fri, 16 July 2004 03:27 |
