2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Difference between and 91 N/A and Turbo

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Old Oct 20, 2006 | 09:53 AM
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Question Difference between and 91 N/A and Turbo

Hopefully someone can help me. What are the visual differences in the block between a N/a and TII......trying to identify a short block that a friend has.
thanks,
Ryad.
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Old Oct 20, 2006 | 09:58 AM
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Quick way? The non-turbo housings have diffusers in the exhaust ports, while the turbos dont.
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Old Oct 20, 2006 | 09:59 AM
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The n/a is 6 port and the turbo is 4 port.
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Old Oct 20, 2006 | 10:12 AM
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Originally Posted by Sideways7
Quick way? The non-turbo housings have diffusers in the exhaust ports, while the turbos dont.
If it's been rebuilt, chances are they were taken out.

The n/a is 6 port and the turbo is 4 port.
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Old Oct 20, 2006 | 10:44 AM
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Yeah...the engine has been rebuilt.....
I will look at the intake ports, but I will have to take the intake out...it's still on.....I was hoping that there was an easy way to tell...say from an identification/model No....e.g....13BT Mazda or 13B Mazda....
thanks...
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Old Oct 25, 2006 | 12:28 PM
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With the LIM off, you'd see two pairs of holes on each outside housing.
With the LIM on, it's kinda obvious with the 6-port actuators.

No, there are not markings to tell you it's a turbo or not.


-Ted
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Old Oct 25, 2006 | 01:33 PM
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You can also tell by the oil filler neck. It its straight up its N/A. If its horizontal then its a turbo.
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