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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Could we add Oil Jets to our engine?



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      03-21-2012, 02:05 PM   #1
klipseracer
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Could we add Oil Jets to our engine?

I know the supra has these, when we start going for big power I can see how cooling the surface of the piston down would help tremendously. I wonder what type of clearance we have and how much plumbing would be required to implement this in our engine? Do we have anything like this along the lines of special coatings on the pistons or oil cooling?

Here is a good article about it: http://mngforce.typepad.com/nc450vde...g-oil-jet.html



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      03-21-2012, 02:07 PM   #2
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the honda k20 motor had these as well. while there are some piston cooling benefits, i don't think they would be worth the trouble of installing oil squirters really. some of the higher hp turbocharged k20 motors actually deleted the stock oil squirters, with no ill side effects.
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      03-21-2012, 02:11 PM   #3
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Quote:
Originally Posted by bryce View Post
the honda k20 motor had these as well. while there are some piston cooling benefits, i don't think they would be worth the trouble of installing oil squirters really. some of the higher hp turbocharged k20 motors actually deleted the stock oil squirters, with no ill side effects.
I guess that depends on how well they were handling the knock in other areas.
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      03-21-2012, 02:15 PM   #4
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The N54 has them already
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      03-21-2012, 02:33 PM   #5
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Originally Posted by RobBeck View Post
The N54 has them already
+1 We do have them.
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      03-21-2012, 02:45 PM   #6
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good to know
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      03-21-2012, 02:48 PM   #7
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+1 Oil jets are quite mainstream. Even the base R18 civic motor has them.
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      03-21-2012, 03:04 PM   #8
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Quote:
Originally Posted by RobBeck View Post
The N54 has them already
Wow, great to know I was curious if we had anything like that. I wonder if there is a way to increase the performance of them? Do they squirt on the rod or do they spray all the way up onto the bottom of the piston?
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      03-21-2012, 03:24 PM   #9
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Yep. Oil jets aka oil squirters are quite common. The almighty 1.8T Nevah' Loose VW/AUDI engine (introduced in 1996) has them as well. Almost all higher output engines have them.

EDIT: It should be noted that it is even more critical for engines with oil jets to have properly sealing piston rings in order to control oil consumption and fuel dilution in oil.
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      03-21-2012, 03:29 PM   #10
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Quote:
Originally Posted by klipseracer View Post
Wow, great to know I was curious if we had anything like that. I wonder if there is a way to increase the performance of them? Do they squirt on the rod or do they spray all the way up onto the bottom of the piston?
They should be aimed at the bottom of the piston. They are designed for improved cooling of the pistons.
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      03-21-2012, 03:37 PM   #11
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Quote:
Originally Posted by vasillalov View Post
They should be aimed at the bottom of the piston. They are designed for improved cooling of the pistons.
I've read that some of them that have the oil come out of the bearings squirt the oil on the rods which is where a lot of the heat from the combustion chamber radiates to from the piston where as some of these manual squirters actually have a tube that sloshes it up right onto the piston bottom itself.
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      03-21-2012, 04:00 PM   #12
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+1 We do have them.
Thank you for that!
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      03-21-2012, 04:05 PM   #13
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Quote:
Originally Posted by klipseracer View Post
I've read that some of them that have the oil come out of the bearings squirt the oil on the rods which is where a lot of the heat from the combustion chamber radiates to from the piston where as some of these manual squirters actually have a tube that sloshes it up right onto the piston bottom itself.
Correct. They look something like this:

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      03-21-2012, 05:00 PM   #14
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well looks like we have the tube ones from that picture. I think I remember something about the auto trannies having a water cooled oil cooler? I think I remember seeing something going into my radiator. But what about our oil cooler? My 335 never had one, is it water cooled as well?
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