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What are some options to dealing with extremely sensitive boost control? I've got a mac 3 port valve running at 30hz. On 0% DC, the car holds a steady 28psi dropping to 27psi by redline. On 15% I hit a perfect 30psi across. 24% holds 34PSI to redline. 25% holds 36PSI, but the moment I go to 27%, the boost goes over 44psi. It becomes uncontrollable in open loop control. This is a 2% increase in duty cycle bringing the boost up over 10psi. Twin 44mm gates, plumbed like the image attached. Stiffest springs, so around 25 psi of springs are inside. Turbo is a next gen 7275 on a 4b11t controlled by AEM Infinity. I wanted to try to do decimals in the boost duty cycle table, but it looks like they get rounded to the nearest 1.
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35psi.PNG
- 44psi.PNG
- wastegateplumbing.jpg
