Bottom Line: Which oil feed setup for FP Green?

[jjrock5]

I read the few threads on here and got mixed answers. I didnt feel comfortable with some of the advice given to others. It took me all morning today to get in touch with Forced Performance. When I got through I ask the technician what size feed line I should use with the DSM FP Green. He says that the feed line they offer will work fine. I tell him that I have an ExtremePSI -4AN and if I could use that or if a restrictor would be needed from the oil filter housing. He rudely kept pushing for me (for like 15 mins) to buy the FP line that costs $65!! Im almost positive theirs is just a simple -4 AN line with a jacked up price just like everything else on their site. Their turbos are proven but still expensive nonetheless.

Here's the FP line:

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Forced Performance Turbochargers: FP 2g Oil Supply Line

Here's the ExtremePSI:

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EXTREME PSI : Your #1 Source for In Stock Performance Parts - Oil Feedline Kit (Oil Filter Location): Mitsubishi Eclipse 90-99

They're BOTH -4AN lines with the same OFH elbow!!

I finally "forced" him to give me some info. He said that a dual orifice fitting should be used (that they offer on their line) and it should have an orifice opening of at least .160" on both orifices to provide the turbo with enough oil.

So it looks like the main concern with these turbos may not be you can overoil them (which I guess it is possible but not under the realm of DSM oil pressure, but I could be wrong) but more of you can starve them of oil...

Bottom line, can somebody tell me which setup is proven to provide the FP Green with enough oil? My setup is stock 7 bolt, no balance shafts, and no ported OFH.

Thank you for the time.

 

[JusMX141]

He said that a dual orifice fitting should be used (that they offer on their line) and it should have an orifice opening of at least .160" on both orifices to provide the turbo with enough oil.

This is shocking information considering the factory line from the head which is designed to work with Mitsu turbos not only has a lower feed pressure than the filter housing but it also has a restrictor built into the banjo end of the line at the turbo.

Curious where they're coming up with more pressure and more volume being what the turbo needs without putting the seals at risk.

So it looks like the main concern with these turbos may not be you can overoil them (which I guess it is possible but not under the realm of DSM oil pressure, but I could be wrong) but more of you can starve them of oil...

Once you reach a certain boost level where the shaft loads are higher, perhaps (25psi or so)....but more oil than the turbo needs is definitely not a good thing.

Bottom line, can somebody tell me which setup is proven to provide the FP Green with enough oil? My setup is stock 7 bolt, no balance shafts, and no ported OFH.

I'd go filter housing with a .075" restrictor; but if you want to use it unrestricted as they claim then by all means do so. If the turbo fails from being over-oiled, then you can blame FP.

 

[jjrock5]

I'd go filter housing with a .075" restrictor; but if you want to use it unrestricted as they claim then by all means do so. If the turbo fails from being over-oiled, then you can blame FP.

. I dont care about blaming them that they dont know jack. I just want the Green to have proper oil pressure.\

Do you think the setup you recommend will be adequate given that the OFH is not ported? I have in inline oil pressure gauge that I installed previously. What sort of oil pressure should I look for at idle/higher RPMs with this turbo?

BTW I have the same ebay oil -4 .075 restrictor that you recommended somebody on the Holset thread a while ago. The seller was a guy in Texas I believe. So I'm assuming this is enough.

 

[JusMX141]

Do you think the setup you recommend will be adequate given that the OFH is not ported?

Sure.

I have in inline oil pressure gauge that I installed previously. What sort of oil pressure should I look for at idle/higher RPMs with this turbo?

No more than 65psi at wide-open throttle, POST restrictor.

BTW I have the same ebay oil -4 .075 restrictor that you recommended somebody on the Holset thread a while ago. The seller was a guy in Texas I believe. So I'm assuming this is enough.

That's what I'm talking about, yes. Don't over-tighten that fitting- they're only aluminum and will strip easily if torqued too tight.

 

[jjrock5]

Very well then. I will try to install it tonight and come up with some oil pressures for the members' viewing pleasure.

Thanks again bud.

 

[JusMX141]

For what it's worth, I've seen less seals blown on filter-housing fed MHI turbos that were using a banjo fitting at the turbo instead of the blue fitting that threads into the turbo with a 90* angle on the line itself. I don't know if the banjo fitting slows the flow down a little over the open AN fitting or what.

 

[jjrock5]

Ah crap, well I have the fitting style line, not the banjo. But then again, I WILL be using the restrictor. Let's hope this does the trick. Do you recommend not running the car if I do an idle WOT rev and see the oil pressure go past the 60 psi mark? I mean, will ~70 psi be okay for what it's worth? I mean I know if I see 100+, that something's up.

 

[JusMX141]

will ~70 psi be okay for what it's worth? I mean I know if I see 100+, that something's up.

Nobody really knows what the max pressure for a MHI turbo is, but it's LOW considering the turbo is fed from the head at the factory.

I'm sure the number is specific....for instance, Holset recommends no more than 72psi of oil pressure at the inlet. Not 70psi or 75psi; it's 72psi max.