Dolan Posted November 18, 2020 Share Posted November 18, 2020 So I've been getting my car setup on flex fuel and have noticed an issue with the desired boost not matching the actual boost, causing closed loop wastegate control to lock the boost at wastegate spring pressure. I've fiddled with it a bit and have found that around 2x desired boost (desired boost at 32psi desired boost, the datalogged boost error will reach 0psi at around 16psi boost pressure (~31psi MAP)) I'm not too sure whats going on here, maybe with the e85 tables its trying to reach the specific MAP pressure where as on 98 its trying to use the relative boost pressure? Thanks! Quote Link to comment Share on other sites More sharing options...
Darryl@pcmtec Posted November 18, 2020 Share Posted November 18, 2020 Hi Dolan, can you check that all the tables and scalars you are editing are all in units of psi. The desired boost table by default is in units of inches of mercury (inHg) which is about double the PSI value. 1 Quote Link to comment Share on other sites More sharing options...
Dolan Posted November 18, 2020 Author Share Posted November 18, 2020 That would be why haha. I remember changing the units of pressure to psi before I added flex fuel to my custom os. Thanks for the heads up! Quote Link to comment Share on other sites More sharing options...
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