3B turbo oil feed (3 Viewers)

[PATHnz]

I am in the process of gathering parts to fit a Toyota CT12B from a 1KZ-TE to my 3B. Planning on sourcing oil from one of the bungs in the side of the block. What size hose is suitable for the oil feed? I understand the plugs on the block are threaded 1/8 BSPT and I probably need to adapt that to an AN thread?

Planning on using something like a 1/2" tube to the sump for oil drain.

 

[350HJ75]

I have used a teflon/stainless braid hose as the feed line which is dash 6 - (7.9mm ID) not sure if it works yet as i am yet to start the car.

Drain hose is 5/8 (16mm) again untested.

this is using a TD04L turbo and the subaru factory banjo bolt as the restricter on the feed line.

Personally i would not see using something like dash 4 for feed as being a problem as there is normally a restricter is required anyway, i only used 5/8 drain hose as that is what came with the turbo.

HTH

 

[dare]

How big is the hole in the subaru restrictor bolt? The one that came with my Kinugawa looks to be around 2mm.

FWIW the CT12b is a TD04 deriviative. It uses a TD04H turbine, 7.4cm exhaust housing and 39/58 compressor. (all from memory)

Also FWIW the turbo oil feed is m10x1.5

 

[brownbear]

I used the 1/8 MSP to 1/4 An (-4) fitting. 1/2 or 5/8 inside diameter scavenge is good. Rule of thumb is double for the scavenge.

oil pan man

You can see my return to the pan.

 

[gerg]

I drill those restrictors out usually. 3Bs aren't known for having awsome oil pressure.

 

[cruisedeisel]

Next you will asking how to turn up fuel on a 3b IP.

 

[350HJ75]

Subaru restrictor hole in the banjo bolt is 1.5mm. how much do you drill them out to gerg?

my measured oil pressure is between 30 and 40 psi hot cruising i wonder if you think i should drill mine out at all?

i guess one could measure the oil flow coming out of the turbo in l/min holding an rpm and hence a specific oil pressure with a cup under the drain line... but what is critical for a turbo - pressure or flow?

 

[gerg]

Measure the outflow is always better. The td04 housing has an internal restrictor built in anyway. Forgive me but I don't have the size I drill out on hand but it's about double the diameter of the restrictor hole.

 

[brownbear]

I drill those restrictors out usually. 3Bs aren't known for having awsome oil pressure.

I use 15/40 oil. Never had an issue with oil pressure. The only time ive seen it drop was at idle after it was really hot. A person could use 20/50 also if they lived in a hot area.

 

[gerg]

300cc /minute at idle from return to oil pan is what I look for on a journal bearing turbo.

 

[Tapage]

info I never seen before it's turbo oil pressure it can handle ... my 2H can raise easily 100 PSI ( top of my gauge ) @ 1400 rpm when cold ..

 

[PATHnz]

Next you will asking how to turn up fuel on a 3b IP.

I know that.. and don’t really intend to touch the fuelling at this stage.

 

[350HJ75]

300cc /minute at idle from return to oil pan is what I look for on a journal bearing turbo.

cool, when I get mine cranked up for the first time I will have a measure and see what my oil flow is, I have a pressure sensor on the same line as the oil feed so at least I can have an idea of pressure and flow and see if the numbers are ballpark

 

[gerg]

Cool. Journal bearing turbos are inherently tolerant to high pressure, but no bearing is tolerant to oil starvation.
g

 

[PATHnz]

Anyone tapped a 3B oil pan for a screw in fitting, or is a weld-in barb the only way to go for oil return?

 

[gerg]

The pan is too thin to tap, you'd need a bulkhead fitting to do it without welding.