Turbo Question

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cammerfe

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For those of you who have had 'eyes-on' the remote turbo systems such as Ills installed, a question---There has been, over the last few days, a discussion, on the Turbo Forum of the possible layouts for oiling. I am under the impression that the Ills/STS system uses oil supplied from the engine to lube the turbo(s) and the electric pump is set up to scavenge that oil and return it to the engine sump. Is this in accord with your understanding? And as an aside, where was the engine oil gallery tapped for the pressure side?

Any information will be greatly appreciated.

KS
 
The only 'cooler' would be an intercooler that is in the air ducting between the turbo(s) and the throttle body. We are exploring here the lubrication system for the Turbo(s). Thanx!

KS
 
From sts's site..:

"Our system uses the engine's pressurized oiling system to supply the turbocharger. This pressurized oil travels approximately 12 feet through tubing which dissipates heat out of the oil just like an oil cooler to provide cool oil to the turbocharger. The oil is then scavenged from the turbocharger via an electric oil pump which returns the oil to the engines valve cover through another long length of tubing which again cools down the turbo-heated oil before entering the engine."

I was wrong.. :)
 
FASTLLS said:
Couldn't you use the oil cooler adapter.. use the output for going to the turbos and the input coming from..
Click to expand...

There's no reasonable way to tap the oil in the cooler. The two hose connections are for water, not oil.
 
Thank you all for your input. And any other comments will also be very much appreciated. It has been my intention to tap a likely place in the block casting, adjacent to an oil gallery, for a take-off to send oil to the turbos, and nothing about our discussion here, so far, has deterred me. I'll also likely pick a spot on the block skirt to return the oil, with the proviso that it be above the level of oil in the sump to preclude any 'head' for the pump to work against.

KS
 
The oil cooler is an oil-to-water 'sandwich'---at least on the engine in the garage at the moment, and has no external oil lines. One heater hose is routed past and the radiator water in the hose helps cool the oil. And, as mentioned above, it's necessary to return the oil to a non-pressurized area to preclude having a 'head' for the electric return pump to work against.:)

KS
 
If you are using an electric pump to send the oil back to the engine, why not just install a small oil cooler for the turbo and use the pump to run it thru that one and have it mounted closer to turbo. Then change the oil on a regular basis, you could even use a heavier oil like 40w or 20/50w for the turbo.
 
Turbo Oiling Practice

I believe that what you are describing is a separate oil system. Such a system is certainly used on occasion, but it necessitates a tank, and adds unnecessary complexity. In addition, an electric feed pump, if it were to blow a fuse or otherwise fail, would instantly deprive the turbos of lubrication. Since turbos 'idle' at as much as 25 thousand RPM and reach far over 100 thousand RPM when 'working', their destruction would be virtually immediate. On the other hand, if the scavenge pump were to fail, the only likely result would be that your exhaust would have a tendency to be a bit smoky from the oil that works its way past the cartridge seals. This is not very likely to do any lasting harm.

Oil to the turbos at a regular engine temperature of 180 to 220 degrees is just fine. Keep in mind that the oil feed usually has a restriction such that the oil volume is hardly more than a dribble. It simply needs to be constant. Higher viscosity than engine oil would be unnecessary and could well be detrimental.

KS
 
Last edited:
Ken - the STS systems I have installed included a T-fitting to allow a tap where the oil pressure sender is - pulled the sensor, install the tap, then the sendor goes back into the tap, and the oil feed line come off the tee.
 
as quik said. t tap the pressure sender. then pump the oil back and either tap it into the side of oil pan or into the valve cover. some guys just put a fitting in their oil cap for the return.
 
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