Yoda's Turbo Log

[cdydjded]

Yoda: I would like to advise on some issues with the Zage kit:

1) The oil pan it comes with has the return bung in a very awkward position. It is positioned towards the front of the car. What happens here is that when your oil return line comes out from the turbo its route is straight down, which is what you want, but then you have to route it foward almost parallel to the ground, which is not good. A proper return line route should as strait as possible. I know this cause I have there pan on my car.

2) The AFM is mounted to the inlet of the turbo, which means is sucks through the AFM. I feel its better to blow through the AFM, just my opinion.

3) The routing of the I/C pipes is under the car. If your car is lowered you are going to have clearance issues.

Issues 2 & 3 are small, but issue 1 is a big deal. Im not trying to have you not buy their kit, Im just trying to make you aware & help you out.

[Yoda]

no prob thx for the advice. 2&3 i knew about. we are here to help each other so thanks for the info. my question is what adverse effects can take place from the oil return being like that? shorter life of the turbo? if its a detrimental problem then i will just tap my own where i want it. if some of you who have turbos can show me where your tap and lines are that would be helpful.

at work so i am typing this up on my phone. sorry for any grammatical errors

[cdydjded]

Originally Posted by Yoda

no prob thx for the advice. 2&3 i knew about. we are here to help each other so thanks for the info. my question is what adverse effects can take place from the oil return being like that? shorter life of the turbo? if its a detrimental problem then i will just tap my own where i want it. if some of you who have turbos can show me where your tap and lines are that would be helpful.

at work so i am typing this up on my phone. sorry for any grammatical errors

The problem is the following, the oil feed is high pressure in, the return is low pressure gravity feed. What is happening since the return is low in the pan it uses the suction of the oil pump to flow oil. When you are accelarating there is no problem, high pressure in, suction through the oil pan. But at low speeds or between shifts there is not enough suction/flow out of the turbo so you get oil creaping through the seals in the turbo. At that give a little puff of smoke through the exhaust. The best way is up high in the top part of the pan. That way the oil will just flow out of the turbo & into the top of the pan above the oil in the pan.

[Tamago]

Originally Posted by cdydjded

The problem is the following, the oil feed is high pressure in, the return is low pressure gravity feed. What is happening since the return is low in the pan it uses the suction of the oil pump to flow oil. When you are accelarating there is no problem, high pressure in, suction through the oil pan. But at low speeds or between shifts there is not enough suction/flow out of the turbo so you get oil creaping through the seals in the turbo. At that give a little puff of smoke through the exhaust. The best way is up high in the top part of the pan. That way the oil will just flow out of the turbo & into the top of the pan above the oil in the pan.

i ran a -8 return line directly into my pan with absolutely no flow problems.. welded a -8 JIC 90deg fitting facing backwards to the "side" of the pan. proper return line sizing is more of an issue than where the oil flows to.

[cdydjded]

Originally Posted by Tamago

i ran a -8 return line directly into my pan with absolutely no flow problems.. welded a -8 JIC 90deg fitting facing backwards to the "side" of the pan. proper return line sizing is more of an issue than where the oil flows to.

I also have a -8 return line. But as you stated you welded the bung on the side on the pan, the Zage pan has the hole in the front of the pan in a 45 degree angle.

[Tamago]

Originally Posted by cdydjded

I also have a -8 return line. But as you stated you welded the bung on the side on the pan, the Zage pan has the hole in the front of the pan in a 45 degree angle.

well that's just dumb of them lol..

[Yoda]

umm ok you have to remember i am noob to this whole oil pan thing. So are there two taps in the oil pan? one for feed one for return? Are you sayin that the return line needs to be further up the top of the oil pan so gravity can take the oil from the turbo back down to the pan?
So if the oil flow through the return is not good it can lead to a build up in the turbo and will breach through the seals?
Would like to get it right the first time...synthetic oil not cheap lol.

Again pictures whould really help clear it up when you guys have the time

[Tamago]

Originally Posted by cdydjded

2) The AFM is mounted to the inlet of the turbo, which means is sucks through the AFM. I feel its better to blow through the AFM, just my opinion.

if it were better to blow through the AFM, don't you think Subaru would have done this on their STI? (same part number MAF as the yaris)