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Rotor housings

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Old May 2, 2009 | 05:51 PM
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TX Rotor housings
What's the difference between NA and TII housings? Strength, size, ports, etc..
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Old May 2, 2009 | 05:53 PM
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TII are 4 port, I believe are the same otherwise minus some minor things like they don't have exhaust inserts, or the insert is different, can't recall.
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Old May 2, 2009 | 06:44 PM
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Only difference between n/a and TII rotor housings is the exhaust insert.
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Old May 2, 2009 | 06:52 PM
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So if I used NA housings on a turbo engine then it shouldn't be a problem except for the freeze plugs. Correct?
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Old May 2, 2009 | 07:34 PM
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Originally Posted by cmanns
TII are 4 port, I believe are the same otherwise minus some minor things like they don't have exhaust inserts, or the insert is different, can't recall.
the intake ports are on the irons, not the housings. stock motors anyway
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Old May 2, 2009 | 07:47 PM
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I thought the intake ports were on the irons on all of them except for the 12A's and a peripheral ported motor.
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Old May 2, 2009 | 08:34 PM
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^ You are correct. People tend to mix up irons and housings while talking about ports.

Careful though, the "timing"/spark plug locations vary between 86-88 and 89-91. So don't go mixing those up
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Old May 2, 2009 | 08:47 PM
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NA housings will be good to go besides the freeze plug. Just cut out or replace the exhaust sleeve.
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Old May 2, 2009 | 09:01 PM
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Ok. I just figured the TII housings would be heavier/stronger or something. I keep hearing "don't turbo charge an NA."
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Old May 2, 2009 | 09:03 PM
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Originally Posted by NA87FC
Ok. I just figured the TII housings would be heavier/stronger or something. I keep hearing "don't turbo charge an NA."
That's where the IRONS come in. A whole new animal...
And the manifolds, and the fuel injectors, and the fuel pump, and the ECU, and the...
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Old May 2, 2009 | 10:03 PM
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What's the deal with the intake ports? I thought I saw somewhere in a thread about choosing a 4 port over a 6 port. I thought the 6 port was better.
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Old May 2, 2009 | 10:38 PM
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you need to do more reading.
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Old May 4, 2009 | 09:56 AM
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Originally Posted by sircygnus
you need to do more reading.
+1
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