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Old 06-11-2018, 12:16 AM
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Diseasel300 Diseasel300 is offline
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The turbo 606 isn't that different from the turbo 603 mechanically other than 24V vs 12V. You still have a mechanical injection pump, although with electronic controls for the rack instead of a mechanical throttle linkage. You have a fixed geometry turbo with a vacuum operated wastegate controlled by the ECU. You have an EGR valve. You have an ECU that controls the EGR, the electronic throttle, and the boost control. Fuel enrichment is performed via a pressure transducer and controlled electronically by the ECU instead of mechanically by the ALDA. On a stock system, the chipped ECU changes the electronic throttle PIDs, the EGR control loop, and the wastegate controls.

Your fuelling is still a function of the internal setting of the mechanical part of the injection pump and your injection duration is a function of the size of the pumping elements in the injection pump. No mod chip is going to change those parts of the equation, the electronic parts of the IP can only respond to the limits of the mechanical settings.

Swapping in a different turbo may change your max boost and it may change the spool time, but unless you have a way to increase the fuelling of the IP, you won't make any more power. The ECU should be responding to boost pressure in the manifold. With the stock or modified tune, you should not have issues with EGT's even if you're making more boost.
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