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Old 02-24-2008, 01:29 AM   #1
Kastley85891
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Member#: 127704
Join Date: Oct 2006
Chapter/Region: TXIC
Location: TX/Austin
Vehicle:
2013 Hybrid
Needs an 05STI

Default Two questions - one thread - 1XHW 1XSW

Firstly If I remove after market header and upipe and revert to stock how much could it mess up my tune?

Secondly, My Absolute pressure feedback in Romraider test release is maxed at 18.4 even though my atmospheric pressure is 12.5 and my total pressure is as much as 33-34?? any known bug?

Cheers and appreciate your advice/answers
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Old 02-24-2008, 06:48 AM   #2
Tea cups
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No, it is not a bug. It is a function of the Subaru ECU. "Manifold Relative Pressure", a standard SSM parameter, will always be limited to 18.43 psig regardless of atmospheric pressure. You should be logging with "Manifold Relative Pressure (Corrected)". This still has a limit, however, it will be impacted by local atmospheric pressure. In your case, at 12.5 psi, the corrected parameter will read up to 24.5 psig. If you need more than that, then DL and install the latest romraider defs and log "Manifold Absolute Pressure (Direct)" which has NO effective limit.
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Old 02-24-2008, 07:04 AM   #3
Kastley85891
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Location: TX/Austin
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2013 Hybrid
Needs an 05STI

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Quote:
Originally Posted by Tea cups View Post
No, it is not a bug. It is a function of the Subaru ECU. "Manifold Relative Pressure", a standard SSM parameter, will always be limited to 18.43 psig regardless of atmospheric pressure. You should be logging with "Manifold Relative Pressure (Corrected)". This still has a limit, however, it will be impacted by local atmospheric pressure. In your case, at 12.5 psi, the corrected parameter will read up to 24.5 psig. If you need more than that, then DL and install the latest romraider defs and log "Manifold Absolute Pressure (Direct)" which has NO effective limit.
Thanks tea cups, I went out tonight and just logged all the relative pressure parameters and worked out what was going on, thanks fo rthe advice though - appreciated.
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