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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 |
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T28 Turbo Line and Restrictor
I've researched and understood the importance of an oil restrictor for our T28. However, I'm still confuse if it is an individual unit that acts as an adaptor in between the turbo line and the turbo?
I've found that a normal T28 turbo line (Circuit Sports) costs around $110, but a stand-alone turbo line (Earls) included restrictor costs almost $60 more. Is this simply an additional restrictor included in the so called "stand-alone" turbo line or something is different? An oil restrictor bascially costs $10, is there any difference? Am I safe to buy an oil restrictor to put onto a turbo line that is not "stand-alone"? I've tried to email takamotorsports regarding this, but no replies ![]() |
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#2 | |
Zilvia Junkie
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#3 |
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Full-Race Motorsports
^^ that sir is an oil restrictor you can also find some here: http://www.phase2motortrend.com/babeoilretsi.html and here: http://www.ilovemyhookerheaders.com/966303ERL.asp all this info was found with 1 search on zilvia, next time dig a little ![]() |
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#4 | |
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#5 |
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The restrictor is still the same piece whether your buy it separately or as part of a kit. All of those links were given as examples of what a restrictor looks like.
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#6 |
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i think what the op is asking is:
if you buy a circuit sports kit, is the restrictor built into the an fitting already or do you need a separate one in addition to the kit. |
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The reason most line kits don't come with restrictors is because you use a different size restrictor for journal-bearing vs ball-bearing turbos. There you go.
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^ exactly true. Typically BB turbo's have more restriction b/c they need less oil flow. At the opposite, you have a journal bearing, which relies on a thin layer of oil and close tolerances, so they need a higher flow. TAKA lines, which I use, are unrestricted from the factory.
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#10 |
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Depending on the turbo, you MIGHT be able to get away with it. If you have a BB turbo, I wouldn't do it. I've heard some people say that you can get away with no restrictor on a journal bearing, but I wouldn't test it. The reason being is that there is a large spectrum at hand when considering adequate oiling, not so much with OVER oiling. My SR20 runs over 80psi @ ~5k, that is more than enough pressure to push out your seals.
I run a FP 20G on my SR and was told by them that I didn't need a restrictor; I laughed and hung up the phone. I say 1/32" (0.031") for BB and 1/16" (0.063") for journal....
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#12 | |
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#13 |
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I agree completely - SR's run just as much pressure as any other motors lol, easily 70psi - you definitely should be using restrictors. Common sizes are listed above (1/32" for BB and 1/16" for conventional).
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