Turbo Oil Feed ????

[WORPeclipse]

I am in the process of building a 63/64 hybrid with a 1g head. My question comes to which oil feed to use. I have the factory 7 bolt 63 OFH I'm using on the 7 bolt 64 block. So there is a turbo oil feed line coming off the OFH, and with the 1g head there is also a oil feed line coming off the end of the head.

Which is better to use and why?

Would the oil feed from the OFH be cleaner and cooler? Also what is the pressure coming off there?

I do have a BS removal if it makes a difference.

How would I go about getting the hole I don't use blocked off?

 

[92AWDHX40]

Cleaner oil better pressure, this is somewhere on the forum about why to use it but there you go. Find a plug at lowes thats what i did, look around at hardware stores there out there it took about 5 minutes to block off i just screwed in the plug. Done.

 

[WORPeclipse]

Awesome thanks. Thats what i was thinking just wanted second opinion.

 

[92AWDHX40]

No problem I try to be helpful when i can.

 

[SD99GST]

I was wondering the same thing and from what i have read would be cautious about getting it from the OFH due to high pressure. A reducer might be needed in the line depending on what turbo. Not sure if the removal of BS makes pressure go up or down, but i know it matters.... Most people would tell you that have a opinion on this to grab from the head, but thats just from what i have read on this site. There is a few nice threads on this, long but worth reading.

 

[WORPeclipse]

I have read some many. It's back and forth. You read one and the next says the opposite. I know factory came from the OFH. They had to change from the head to the filter housing for some reason. I am going to be running a braided stainless line for the oil feed.

 

[CHAR-FT]

There is better oil pressure; however it's all the same oil running through the entire engine through the same oil filter. Your oil pressure will also be higher than normal since you have no BS. Expect high oil pressure already. I would feed through the oil filter housing only because of pressure, nothing to do with the cleanliness of the oil Find the recommended oil pressure for that turbo, measure the pressure at both places and if need be adjust the pressure with a restrictor and go from there. Also if you can measure the presure at idle cold/warm and idle/WOT.

 

[JusMX141]

I know factory came from the OFH. They had to change from the head to the filter housing for some reason.

Because the 2G DSM's were the only Mitsubishi cars to come from the factory with a Garrett turbo. The T25 requires more oil volume and pressure than a 14B, hence the unrestricted filter housing feed line. A 2G also has a slightly larger oil drain tube than a 1G to help to drain the additional oil from the cartridge.

To better understand what Mitsubishi does, look at the Evo VIII and IX which come with a Mitsu 16G. Again, the feed is back at the head.

You must understand your turbo's oiling requirements before you ever start the car with a new turbo on it or you risk damaging the turbo in some way.

 

[williillii]

I had a 14b on my 7 bolt 2.0 fed direct from the OFH with no restricter for 60,000 miles(with balance shafts). Then I killed that motor and swapped in a 4g64 bottom end, w/o balance shafts. I ran the 14b for another 5,000 miles like that boosting up to 20psi. I retired the turbo a couple weeks ago at about 135,000 miles.

Now I have a 20g on the car, and Im kinda paranoid about feeding it this much oil. Especially since the car runs at a higher pressure without the balance shafts. I just picked up an oil pressure gauge. So I just need to get some fittings and I will report back what I find..