Can you return the 0.4mm jet and we can test it for you, I will replace it with a new one.
0.6mm: - we have got that far yet, you must be getting some exceptional response, based on the 0.3mm jet we tried.
Excess fuel: - almost all factory turbo cars run rich, so if pre-turbo is so effective to lean-off a/f ratio, then there is little tuning needed to gain power plus point is the in-built fail-safe mechanism?
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Richard L
aquamist technical support
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