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Exhaust Airflow Measurement?


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After looking at valve timing, injectors and throttle body. I am trying to get back some lost power that may be caused by clogged converter(s).

Does anyone have the resources to measure exhaust airflow for a stock SC400 (1992) ?

I think I can use a hand-held airflow meter (from my workplace) placed at a fixed distance from the exhaust and get a Feet per minute measurement for airflow - for different RPM's. I have a feeling mine may be less than ideal but need a good comparison.

If anyone has the resources let me know. (I wonder also if my local emissions place could give this data)

Thanks in advance for any input.

ps. If you think your high flow exhaust is better than another this would also be good info.

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