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Old 01-11-2013, 12:18 PM
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bear-avhistory bear-avhistory is offline
2014 435M-Sport Coupe
Location: NC - USA
 
Join Date: Nov 2006
Posts: 1,820
Mein Auto: 2014 435M-Sport Coupe
Quote:
Originally Posted by thekurgan View Post
Is ram air effective with forced induction? Even at speed? The 335 airbox seems generous enough to not warrant forcing air into it.

How about 'maybe'. I am sure the pros selling product might jump on my butt but I think the answer is how many CFM of air does the turbo need when its maxing out its ability to pump air at the required boost level for the mods you have to perform at their maximum potential.

Once you have that number you need to check the intake tract to see if any portion of it canít support the required airflow. If the tract is just OK or has a little bit of a restriction then forcing air under pressure into it can help. If the tract is just plain too small even with some ram air to move the number of CFM of air required it really needs to be replaced with something with the ability to flow air with out restriction.

Bottom line is I think you need a reasonable amount of WHP 400+?? to think about the issue & most of the scoops being sold only effect how the car looks.
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Kevin

2014 BMW 435M-Sport
2013 BMW 135is 6MT conv JB4/ISO
2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FFR Cobra Mk-IV work in progress
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