is there any need
Road Warrior
Joined: Apr 2010
Posts: 1,739
Likes: 10
From: Suffolk, England
Umm, actually Nightrider (makers of Xieds) do suggest it as a good combination and I can kinda see it.
The fuelpak tends to cover the open loop area i.e. the high speed & acceleration bit. However, not so much the closed loop bit. This because the stock ECU is still reading the O2 sensors and will try to compensate for richness in the closed loop area introduced by the fuelpak back towards stock AFRs.
So fitting some Xieds too will richen up the closed loop bit and the fuelpak will handle the open loop.
The fuelpak tends to cover the open loop area i.e. the high speed & acceleration bit. However, not so much the closed loop bit. This because the stock ECU is still reading the O2 sensors and will try to compensate for richness in the closed loop area introduced by the fuelpak back towards stock AFRs.
So fitting some Xieds too will richen up the closed loop bit and the fuelpak will handle the open loop.
Road Master
Joined: Sep 2007
Posts: 782
Likes: 7
From: Texas
Umm, actually Nightrider (makers of Xieds) do suggest it as a good combination and I can kinda see it.
The fuelpak tends to cover the open loop area i.e. the high speed & acceleration bit. However, not so much the closed loop bit. This because the stock ECU is still reading the O2 sensors and will try to compensate for richness in the closed loop area introduced by the fuelpak back towards stock AFRs.
So fitting some Xieds too will richen up the closed loop bit and the fuelpak will handle the open loop.
The fuelpak tends to cover the open loop area i.e. the high speed & acceleration bit. However, not so much the closed loop bit. This because the stock ECU is still reading the O2 sensors and will try to compensate for richness in the closed loop area introduced by the fuelpak back towards stock AFRs.
So fitting some Xieds too will richen up the closed loop bit and the fuelpak will handle the open loop.
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