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The mkiv Supra Owners Club

HKS EVC4 not holding boost?


Multics

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I have an HKS EVC4 boost controller in my R33 GTST setup at 0.85bar. I noticed that it does not hold 0.85bar across the entire RPM range, it gradually drops to 0.72bar at about 4700rpm.

 

Do you think it's the boost controller's solenoid?

 

I haven't noticed any air leaks in the IC pipes etc also running standard recirculating valve.

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