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Old 10-14-2020, 11:32 AM
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Texasdoc Texasdoc is offline
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Join Date: Feb 2012
Location: Keller, TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
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The Performer RPM is a dual plane intake. I have a 1 inch open spacer between it and the carb. My PV is a 10.5 - it had a 4.5 when I got it. It idles at 14 inHg and cruises at 16-18.

I have my primary TS square. I use the secondaries to set the idle speed - about 950 rpm. There are small holes drilled in the secondary throttle plates to allow the TS to be where they need to be at idle. I do have TS restrictor, but don’t remember what their sizes are off the top of my head.

First thing I’m going to do is take the whole thing apart, clean everything, ultrasonic bath included, and re-assemble. Hopefully its just a plugged passageway.
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