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Peter thank you for responding. You definitely know a lot more than me when it comes to this set up. I purchased a new WUR from K jet couple months back when my engine was rebuilt. Car runs and idles great at 13.8 AFR. But it was lean between the 5000 and 6000 acceleration. So I tried to richen it up at idle to see where out would be at WOT. Cam is stock. I installed a PE Bluetooth Wide band AFR to monitor. Maybe Tony can shed some light as you mentioned. Cheers
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1978 911 SC Complete rebuild, 83 engine, SSi’s M&K Sports muffler.
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