Not water cooling the stock turbo?

[MikeRenz]

Would I kill my stock turbo if i hooked it up w/ ONLY the oil cooling, and not using the water ports?

 

[jwaller]

no

 

[BigBadSmoosh]

even if it was for a 3 hour drive?

 

[jwaller]

not needed. it's used in some oe appts to try and help insure they last for 100k miles. I doubt this is a goal of yours.

 

[MikeRenz]

If i run it thise way, should i cap the ports or lets them breathe?

 

[skata]

If i run it thise way, should i cap the ports or lets them breathe?

how about you fill the water passage with oil and then cap it off. this might help dissipate heat.

 

[MikeRenz]

If i run it thise way, should i cap the ports or lets them breathe?

how about you fill the water passage with oil and then cap it off. this might help dissipate heat.

my question was more pointed towards "will capping it build pressure inside the water ports"

 

[bigtime]

open or closed won't make a difference. But make sure you cap the engine outlets!

 

[turbodog]

I would think that capping the turbo ports with water inside would result in the water boiling, extreme pressure? Turbo housing is probably strong enough, but why risk it? I'd leave one open.

 

[bigtime]

I would think that capping the turbo ports with water inside would result in the water boiling, extreme pressure? Turbo housing is probably strong enough, but why risk it? I'd leave one open.

What water? if you don't put any in there will be none to boil.

 

[turbodog]

You're right. I misread. Skata suggested filling with OIL and then capping. Not water. Doh!

Now, I must add that oil is non-compressible... so if you were (at 'room temp') to fill the passage COMPLETELY, then cap it off, then raise the temp to full operating temp.... you again have very high pressure in there. Best to leave it empty. The oil would ony absorb a little heat... then, as soon as it is at the same temp as the surrounding metal, any advantage goes away.

 

[skata]

The oil would ony absorb a little heat... then, as soon as it is at the same temp as the surrounding metal, any advantage goes away.

the main thing i see that the oil will do is transfer heat. air is a poor conductor, and with air in the passages certain parts might get hotter than the other. with a liquid (ex. oil) in the passage, the heat will be transfered across to other surfaces of the turbo to be dissipated.
and if your concern is that oil will create too much pressure, just leave a little air gap in there.
i'm not quite sure how the water passages are on a stock turbo, but you get my point of heat transfer.

 

[turbodog]

OK, whatever...
just some info to help prevent a problem:
coefficient of expansion of oil = 460ppm/degreeF
so if oil gets 300F hotter from fill/seal to full operating temp, it will expand ~14%. So, only fill cavity about 75% full, max. Gotta leave some room for air to be compressed by expanding oil.

and, FYI:
Thermal conductivity of oil = 0.15 W/meter degreeC
Thermal conductivity of iron = 80 W/meter degreeC
so iron conducts heat ~530 times better than oil... meaning that the iron will have conducted the heat around the water cooling passage long before the oil conducts it throuigh the passage.... but, decision is yours.

 

[libertysyclone]

Thanks for the physics lesson, :lol: :wink:

make sure you get the port off the intake manifold blocked off tite, i had a leak when i did mine.

almost none of you aftermarket turbos water cool.

 

[bigtime]

OK, whatever...
just some info to help prevent a problem:
coefficient of expansion of oil = 460ppm/degreeF
so if oil gets 300F hotter from fill/seal to full operating temp, it will expand ~14%. So, only fill cavity about 75% full, max. Gotta leave some room for air to be compressed by expanding oil.

and, FYI:
Thermal conductivity of oil = 0.15 W/meter degreeC
Thermal conductivity of iron = 80 W/meter degreeC
so iron conducts heat ~530 times better than oil... meaning that the iron will have conducted the heat around the water cooling passage long before the oil conducts it throuigh the passage.... but, decision is yours.

Tell me more Dr. Science! :wink:

 

[turbodog]

Thanks for the physics lesson.

Tell me more Dr. Science!

HA! Me the fool, for assuming folks would want to make decisions based on scientific data, rather than old wives' tales and massive beer consumption!

Back to your Ouiji boards, your Tarot cards, your Magic Eight Ball, your Oblique Strategies*, heathens!

* Bonus points to anyone who can identify this reference

 

[tealty]

Dont forget Dungeons and Dragons!
I removed an old garrett(oil cooled turbo) and installed a 20g (water and oil cooled). It has yet to have the water lines hooked back up...just being cooled by oil. This was about 4years ago, and the truck's turbo is still kickin azz. Oh, eno rulez btw!...hahahhaha j/k.
later
Jordan