Poseidon Posted April 6, 2020 Report Share Posted April 6, 2020 I converted my boost pressure control to negative pressure. Have a MAC 35A-AAA-DDBA-1BA valve. how do I set up the table to run close loop boost. The control unit is xtreme Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 6, 2020 Report Share Posted April 6, 2020 What do you mean by negative pressure? Quote Link to comment Share on other sites More sharing options...
Poseidon Posted April 6, 2020 Author Report Share Posted April 6, 2020 have a vacuum pump with this it goes to the vacuum accumulator and then via the MAC valve to the vacuum box when the mac opens, the pressure is no longer reduced. therefore the table must be different or? Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 6, 2020 Report Share Posted April 6, 2020 Hmm, Ok, I dont know, I have never heard of this method outside of some bmw/minis. I suspect from an ECU point of view it will be no different - just the valve will be plumbed so it is NO instead of NC. More duty cycle means more vacuum to the wastegate which means more boost. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.