gt25 & gt28 feed port thread same: oil restrictor
#1
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realized i forgot about the oil restrictor.
im looking at this one on ebay its has a 0.035" hole size would be be ok to run with my 2554? It also says its for the gt28 and says nothing about the gt25, my main question is does anyone know if the thread size for the feed hole is the same for the 25 and 28?
Or do you guys think i need one, looking at the feed port it looks like it has some kind of functional restrictor but i dont know if its enough thats why i come to you all.
heres what i think is the built in oil restrictor?
![](http://i28.tinypic.com/oh4ydy.jpg)
OBX TURBO OIL FEED RESTRICTOR FITTING -4AN GT30R GT35R:eBay Motors (item 160348636476 end time Jul-20-09 16:37:19 PDT)
Thank you
im looking at this one on ebay its has a 0.035" hole size would be be ok to run with my 2554? It also says its for the gt28 and says nothing about the gt25, my main question is does anyone know if the thread size for the feed hole is the same for the 25 and 28?
Or do you guys think i need one, looking at the feed port it looks like it has some kind of functional restrictor but i dont know if its enough thats why i come to you all.
heres what i think is the built in oil restrictor?
![](http://i28.tinypic.com/oh4ydy.jpg)
OBX TURBO OIL FEED RESTRICTOR FITTING -4AN GT30R GT35R:eBay Motors (item 160348636476 end time Jul-20-09 16:37:19 PDT)
Thank you
#5
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Good price. I got this inverted flare to -4AN:
GT Turbo Oil Inlet Restrictor - 034 MOTORSPORT
GT Turbo Oil Inlet Restrictor - 034 MOTORSPORT
#7
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My custom GT3076r (it is a blend of GT3076 and GT3071 with wastegate mods) has a built in restrictor, within the cartridge I believe. I only found this out after having purchased 2 additional line restrictors
The supplier of the turbo said that unless I was running unusually high oil pressure they did not recommend an additional restrictor so both are sat in a draw.
I don't know if this applies to all Garrett ball bearing turbos, I'll see if I can find the email from the tech department of the company I purchased it from, but it is worth ensuring that there is not one fitted.
![](https://www.miataturbo.net/images/smilies/rolleyes.gif)
I don't know if this applies to all Garrett ball bearing turbos, I'll see if I can find the email from the tech department of the company I purchased it from, but it is worth ensuring that there is not one fitted.
#8
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![Default](https://www.miataturbo.net/images/icons/icon1.gif)
My custom GT3076r (it is a blend of GT3076 and GT3071 with wastegate mods) has a built in restrictor, within the cartridge I believe. I only found this out after having purchased 2 additional line restrictors
The supplier of the turbo said that unless I was running unusually high oil pressure they did not recommend an additional restrictor so both are sat in a draw.
I don't know if this applies to all Garrett ball bearing turbos, I'll see if I can find the email from the tech department of the company I purchased it from, but it is worth ensuring that there is not one fitted.
![](https://www.miataturbo.net/images/smilies/rolleyes.gif)
I don't know if this applies to all Garrett ball bearing turbos, I'll see if I can find the email from the tech department of the company I purchased it from, but it is worth ensuring that there is not one fitted.
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