Something about the extra amount of flow compared to the stock turbo at the same pressure level, causing it to go a bit lean. Do you have a Wide Band oxygen sensor to monitor the AFR ratios? I'm curious about how the afr's look under load.
Really, I'm just amazed to see this setup work, didn't know it was possible to run a different turbo w/o a standalone.
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Rotaries:They are NOT that complicated!
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