lumpy,surging power
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lumpy,surging power
I recently had apexi boost controller installed. The power increase is amazing. Hower, when I accelerat on boost at part throtle, the power band is lumpy instead of a smooth surge of power. I recently read in that this is an artifact of subarus engine management strategy not being entirely compatible with aftermarket boost controllers. The ECU won't allow full boost unless you give it more than half throttle. It seems the ECU runs closed loop at these light throttle settings. I'm affraid the air/fuel mixture will be too lean under these conditions and I could be damaging the engine. Has anyone else experienced this? And what should I do about it. Should I have a Exede piggyback ECU installed?
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Joined: Dec 2002
Posts: 10,029
From: Sacramento CA
Car Info: 02 Impreza WRX sedan
Originally posted by code3wrx
I recently had apexi boost controller installed. The power increase is amazing. However, when I accelerate on boost at part throttle, the power band is lumpy instead of a smooth surge of power. I recently read in that this is an artifact of Subaru's engine management strategy not being entirely compatible with aftermarket boost controllers. The ECU won't allow full boost unless you give it more than half throttle. It seems the ECU runs closed loop at these light throttle settings. I'm afraid the air/fuel mixture will be too lean under these conditions and I could be damaging the engine. Has anyone else experienced this? And what should I do about it. Should I have a XEDE piggyback ECU installed?
Vishnu's EMI Adapter will probably go a long way to solving the part-throttle lean out under boost.
--
^ww^
"...axles of evil..." - George W. Bush
I recently had apexi boost controller installed. The power increase is amazing. However, when I accelerate on boost at part throttle, the power band is lumpy instead of a smooth surge of power. I recently read in that this is an artifact of Subaru's engine management strategy not being entirely compatible with aftermarket boost controllers. The ECU won't allow full boost unless you give it more than half throttle. It seems the ECU runs closed loop at these light throttle settings. I'm afraid the air/fuel mixture will be too lean under these conditions and I could be damaging the engine. Has anyone else experienced this? And what should I do about it. Should I have a XEDE piggyback ECU installed?
Vishnu's EMI Adapter will probably go a long way to solving the part-throttle lean out under boost.
--
^ww^
"...axles of evil..." - George W. Bush
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