What are people's opinions to use or not to use an inline oil filter for your turbo kit GT series turbo (GT35R):

1. Is it more risky to use an inline filter if it can clog, restrict oil flow, and causes damage to the turbo?

VS

2. Is it better to not use the inline filter and just change your synthetic oil every 2500 miles?

3. If you use an inline oil filter, how often do you clean it?

Examples and responses by the manufacturer:

1. EARL'S IN-LINE Oil FILTER -4AN:
http://www.streettunedmotorsports.co...oil_filter.htm

2. FP (Forced Performance) -4 AN Inline Oil Filter:
http://store.forcedperformance.net/m...Lancer-TurboHW

"Remember that the filter can become clogged. While you may have prevented a turbo failure by filtering out contaminants, you can CAUSE a failure by limiting oil supply through a plugged oil line filter. Check the filter regularly, inspect the filter whenever you perform an engine oil change."

3. BR -4AN Inline Oil Filter:
https://secure.buschurracing.com/cat...roducts_id=724

 

Why would you not change your oil at 2500 miles??? personally i would just keep the oil in my motor freash. That being said, i havent heard of a ton of ppl running them....although that might not be a topic of conversation all that often.

 

I've been using the inline FP oil filter for a while. I change it every time I change my oil. I've barely seen anything collect in it, its been never clogged. I run it for peace of mind and because if I don't it will void my turbo's warranty.

I change my oil based on how hard I drive the car. I never go over (or even close to) 3,000 miles, I usually change it more frequently.

Are you feeding your turbo from the oil filter housing or the head?

P.S. - The Buschur and FP inline are the same thing. It's made by FP.


-Bink

 

Are you running the Paper or the Mesh filter?
The mesh has relatively large holes in it, so i dont know how much it will filter.
I had crap go through my engine, and the mesh filter didn't do much to stop the damage that occured to my turbo.

 

i never used one and my htagt3582r has ben from for the past 40 miles i been driving it

 

That is the idea I had for a peace of mind. I do not want to do more harm than good!

I guess if its easy to check, I can check it everytime I change the oil. I change my oil at least every 2,500 miles.

Binky: Is there any way it can leak when your checking it that often?

 

My first question is whether the stock oil supply is post filter, which I am confident is YES. If the stock location feeds oil that was just passed through the oil filter then what is the point? Perhaps it would be good for someone to post the oil path from pump to turbo oil supply to understand potential issues. Mitsubishi didn't see a need to run a prefilter other than the stock filter.

Outside of the EVO community I have never used prefilters on GT turbos and have personally not seen a failure. For my current GTX3076r conversion I am not running the pre filter. With that said, for a fresh engine rebuild it might be good to run a prefilter for a few hundred miles just in case. I had a few buddies take out journal bearing turbos on fresh motors due to trash in the system from the motor build.

 

The stock oil filter has an oil pressure bypass valve. This is to relieve pressure across the oil filter element if it's too high.
This is proven by the crap that got pumped through my engine, i was running a genuine Mitsubishi oil filter.
I am going to relocate the oil filter housing when i get my engine rebuilt, and i will be using a non relief valve oil filter to stop exactly that happening.

Proof again this happens, my turbo had damage on it.
Here is a pic (it was using the FP oil line with mesh filter, post oil filter off the oil filter housing).
Scoring on the shaft is damage caused by foreign particles.

 

Have not run one on my 61mmBB almost 40k on it and still kickin so IDK....

 

Good point and something I forgot about. I used to just plug the bypass on my Z so perhaps I need to think about this mod. I know the EVO runs high oil pressure so I wonder what pressure allows oil to bypass the filter.

 

sorry, i think you misunderstood me.
not the oil pressure relief valve thats inbuilt into the oil filter housing. That is required. (mine opens and hold a steady 80psi.)

What i was talking about is the valve inside the actual oil filter.
It opens at a very low level, probably 8-10psi. This pressure is across the paper element in the filter, not the oil pressure that the engine is making. It's there to stop it bulging and restricting flow, for example if the filter gets blocked.
I think FRAM oil filters open @ 12psi?

 

The idea behind the inline filter is that if you engine grenades the particles will not blow your turbo as well. At least that is what I have gathered.

 

^
On my Z we would pull the bypass valve and plug with a 1/4" NPT. As far as the filter, I only run the NAPA Gold/Platinum, but I don't know at what pressure it bypasses. Definitely a good topic to explore so that everyone understands the pros/cons of not running the pre filter. I need to check to understand if/when the NAPA filter bypasses.

 

My turbo didn't blow up, but it definitely had damage on it from foreign particles.

 

if you had a stocked framed turbo i would say go for it but there are 1000s of 35rs on the road with tons of miles or just plan hard abuse without one. some one else mentioned that they have never seen the filters on other cars i agree i cant remember one setup that ever had one that was not a mistu.