View Full Version : CT-26 Oil Pressure?

10-12-2010, 05:44 AM
What should the oil pressure be set to on a CT-26?

10-12-2010, 06:01 PM
in the 3s its tapped at the block and that feed the oil pressure sensor. so it runs fine at normal oil pressure 5-60? Ive seen both tapped at the block and sensor port work just fine.

10-12-2010, 07:11 PM
Im curious how one would "set" oil pressure on ANYthing?

Is there some kind of oil pressure regulator thingamajig that Im unaware of?

10-13-2010, 02:41 AM
I figured it was regulated by size of hoses/pipes/fittings, baffles, restrictors, that sort of thing. I know it can become an issue boosting NA cars, like the 7AFE if I remember correctly, system oil pressure just run straight from the block isn't right or something.

10-13-2010, 06:49 PM
typically a mitsu turbo issue. journal bearing turbos generally don't have the issue. BB turbos, typically, always need some form of a restrictor.

10-13-2010, 08:07 PM
It needs a restrictor. Without one it will blow lots of smoke past the turbo seals.
See Presure2's 5sfTe threads!

10-14-2010, 05:54 AM
So... no answer?

10-14-2010, 05:59 AM
you got your anser in the second post. What more are you looking for?

10-14-2010, 06:27 AM
I figured it was a trick question and Joey is testing us :hehe:

10-14-2010, 06:33 AM
No, I'm pretty sure 80-90PSI will blow out the seals on the CT26 so I'm trying to figure out what regulator I'll need in order to prevent that...

10-14-2010, 07:12 AM
Typical turbos need very little oil, they just need a constant supply of fresh oil. to reduce the oil pressure/flow to a turbocharger they sell restrictors which are just a small oriface on the turbo inlet. you can get these from any turbo supplier.

10-14-2010, 09:16 AM
The 3S is a high volume low pressure oil system (like the 7M which runs the same turbo). As Andy stated the pressure is 5-50. Im unaware there is any restrictor in the stock 3S oil system (or in the 7M for that matter). You are welcome to continue ignoring me, but thats your answer right there.

10-14-2010, 02:19 PM
Hrm... thing is I'm installing it on a 3sge, not a 3sgte so I'll be running some new lines which may, or may not be larger diameter than the OEM lines. That's the only thing that might concern me (pressure vs volume of a larger line vs stock).

10-14-2010, 03:29 PM
Well how do the 5SFTE guys do it when they slap a turbo on? I think that's what Lagos was referring to.

10-14-2010, 08:02 PM
The 3SGE ues the same oil pump as the GTE. As I said, like the 7M, the 3S is a low pressure high volume oil system. Thats why we regularly see less than 5psi oil pressure at idle, and its rare to see more than 50PSI even at redline unless the system has been modified. Ive been around CT26 turbos for alot longer than Ive been around Celicas and I dont know a single guy running any kind of restricter on a CT, or any other journal bearing turbo that Im aware of. I also know lots of the 7M guys like to change out the stock hardlines for stainless with -4AN feed and -10AN drain.

Having now done a little research I believe what you are asking about is mainly a Garrett DBB thing. Ball bearing turbos simply dont need as much oil so the restrictor is designed to increase seal life in their turbos.

10-15-2010, 04:17 AM
Ok, cool. That's what I was looking for.

10-15-2010, 06:11 AM
changing the oil system line diameter will do nothing on the pressure. It will change the volume but not the pressure.

10-16-2010, 05:12 AM
changing the oil system line diameter will do nothing on the pressure. It will change the volume but not the pressure. Not true. When you introduce a restriction to the pressure source (oil feed), with little/no pressure at the exit (oil return), then the pressure and flow at the turbo will be less than the pressure source.

10-20-2010, 06:00 PM
^quite right

The bearings in any turbo are all low pressure. If there is no inline restrictor then the manufacturer designed the bearing assembly to have an internal one. The seals in most turbos are designed for under 25psi.

10-30-2010, 06:39 PM
joey you are putting a ct26 on a 3sge? just bolt it on. end thread.

11-02-2010, 05:51 AM
That was the thought. Think I'll be going w/ an EMSPowered bolt-on kit instead. Go big or go home right?

11-02-2010, 02:33 PM
i'm more than pleased with my bullseye turbo. and they have built in restrictors. yay!