Reason for the new FP oil line for EVO's
 

This is the reason the new line from the filter housing was made available.

This engine has no balance shafts, has oil squirters, and X series main and rod brgs.

Oil is 20W-50 at 70c temp.

Note that the pressure at the head (factory turbo oil supply) has NO flow, if it was hooked up to the turbo the pressure would be approx. 6-10 PSI lower.


http://i163.photobucket.com/albums/t...lPressures.jpg

What psi is needed for the stock turbo? Why do the FP turbos require so much more psi (the turbine is spinning at roughly the same speed correct ?) ? Should the FP turbos be ball bearing (vs journal) - would that help ?

So if we dont have this particular line...(I have the upgraded line but not the one coming from the filter housing) that means we would have no chance at a failure fixed under warranty? If so I guess I will be ordering the filter housing line soon.

Wow... that's really interesting. I'm curious as to why Mitsu dropped the oil pressure so far for the stock oil feed.

As for why the Red needs more oil, I can take some guesses. #1, it probably has larger bearings and a larger diameter shaft. #2, the way people use the turbo, it's subjected to a lot higher thrust loads than the stock turbo. So the thrust bearing is probably bigger and needs more oil.

FP's website only mentions the evo 9 with this product. Would there be significant benefits for an evo 8 or is this less of an issue with non mivec engines.

if fp will void the warranty without this new oil line they should sell this along with the turbo. if a person who bought the turbo didn't know about this then its like he bought a new fp turbo without a warranty.

^^ Only if they can't read...

Have to agree it should be a package deal... IMO. Buy a new car, and it has everything on it needed to be covered under warranty. One need only get/use the proper/specified maintenance after purchase. Your not required to buy a garage in order to keep your rust/perforation warranty etc.

I too agree it should come as a complete kit if it is needed...I still would like to know more about why the FP turbos require this additional oil pressure (vs, stock and other stock like turbos).

The Red gets mighty expensive when you start adding on all the seperate but needed products.

The question isn't whether the Red needs it, the issue is that the stock Mitsu oil feed supply only gives a certain amount of pressure, and that's it. The Mitsu design engineers apparently concluded that the stock turbo, run under stock conditions, with stock boost control, would not require more than that amount to last an adequate time without having to replace it under warranty.

However, we don't run stock turbos, under stock conditions, with stock boost. When you expand the performance parameters, you start running into areas where the factory solution is not adequate. Whether it's the limitations of an oiling system designed to support the stock turbo, or the fuel system designed to support the fuel needs of a bone stock Evo, increased demands require increased supply. That's not just true for a uprated turbo that's sold by FP. From an engineering standpoint, all journal bearings run harder than stock will be succeptable to this oil supply limitation.

FP identified the issue through testing. Nobody else has tried to inform the Evo enthusiast public. They then designed a solution. Nobody else has done that. Thanks, FP, for paying attention and letting me know. That's my take.

Most real enthusiasts learn through sad experience what the performance limitations of their builds are. It often costs way more than the cost of an oil line. I am happy to pay for what I need to meet my performance expectations, when I'm convinced that it will make my parts live longer and run better. In the big picture, this is a small cost when you look at all the money you spend to go faster...

Well, said... and for the record, I'm not busting on FP. However, I DO believe you should not be able to buy the turbo without the line, if the line is required for warranty. Follow? That is unless you have an equally accepted solution.

My last turbokit from FP they highly recommended me to purchase their inline oil filter which screws on the oil line that feeds from the head.

Two things I was told from FP:
My Ball bearing turbokit needed minimum oil lubrication. FP were telling me that if I was putting just a regular direct oil line with no restriction that would be too much oil going into the turbo.
Secondly, they told me that feeding the turbo from the head was more reliable than from the oil filter housing.

I am just sharing what I know. I purchased 3 turbokits from FP in the last 7 years. These guys test their stuff very well and I fully trust them when it comes time to put something on your car.
Carlos

^^ Ball bearing turbos are completely different in their oiling needs than journal bearing turbos like the RED. They each need different pressures and different restrictors, which FP will tell you and sell you. What works well for one would cause problems with the other...

A Red is a journal bearing turbo. It needs higher pressure and volume than a ball bearing turbo.

Just making sure we're all talking about the same issues and not getting one mixed up with the other.

^^^ Thanks for clarifying that for other to see. I was aware of that.. It seems to me like they are dealing with a "mini recall" in which they realize the FP red might fail under some oil conditions. By the way, spot on your post #111, you sum it up very well. Further testing reveals that the FP Red requires better oil flow thus they are offering a solution.

Carlos