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Originally Posted by WedgePerformance
Have you ever wondered how much power you can I make before upgrading your stock airbox to a MR5 or one of the countless options we have today? 
I was actually shocked at the results today... 430.84 vs 416.01 whp
Click Here - Datazap.me
Almost 15 WHP gained by just removing the top of the stock airbox. Because I didn't have other filters with me to test, I can only conclude two possibilities. 1. The BMS Drop-in Filter is restrictive... Or 2. the cold air snorkel is too restrictive without positive pressure from air flow while driving.
The car: Stock '08 Sport E92 AT Stock FMIC, Stock DPs, and 132,000 miles. Mods: Fuel-IT Stage 2 LPFP, ER Charge Pipe with Tial BOV, BMS Drop-In Cloth Filter, and MFactory LSD. Car was walnut blasted within the past 500 miles and has new index 12 injectors.
Car was running a high % of E85 today and it was HOT. Was 102 deg F in the shop today.
[IMG] http://i1198.photobucket.com/albums/...psybkmtsbf.jpg[/IMG] |
And here I am with the kn drop in filter fbo with inlets. So I guess I could try taking off the air box cover and seeing if I feel a difference huh. Good work though and let us know when you find out which one is the restriction