stock air box vs fabbed up cold air kit
Junior Member
Joined: Apr 2013
Posts: 51
Likes: 2
From: Sarasota, Florida
2004 E55 AMG
Keep in mind that, generally speaking, boost is a measure of restriction. All other things being equal, a 'drop' in boost such as this data suggests, could simply be the removal of restriction on the intake side. Meanwhile, the car could still be making more power everywhere, even where boost is lower.
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MBWorld Fanatic!
Joined: Oct 2011
Posts: 2,279
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From: A to the Z (the state)
'06 E55
True. A drop in pressure but an increase in volume is good. Adding ported heads and headers, you will see a drop in boost, but you will be pumping more air through that beast, just more efficiently.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 1,060
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From: USA
'06 E55 AMG
Anytime I've done "effective" pre-S/C mods on my blown Fords (sheet metal plenum or proven CAI) PSIG has shown a marked increase...when no change has been made to heads/cams or exhaust.
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