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Old 08-11-2012, 08:16 PM   #3
djc1827
Scooby Specialist
 
Member#: 238618
Join Date: Feb 2010
Location: 11.82 on vf52 w street tires
Vehicle:
2011 WRX
455whp/480tq 2.5xt-r

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But then your keeping in tons of heat thus raising intake temps...at least with the grill the heat escapes. If removing the grill doesn't effect aerodynamics I think you would only gain hp with cooler temps. After heatsoaking at a light for one minute I have seen my intake temps that are usually 15-20 degrees warmer for example. Its 70 outside. My intake temp is 85-90 crusing. It could go to 120-130 at a light. Even 150 after 3 minutes. It would then take 3-5 mins to cool back down to 85-90 once cruising at 40-55mph. With the grill off, you will increase air flow and release heat 50% faster possibly cutting the time in half. Less knock more timing(hp) I will run a test on this when my engine is back together. I think a hood with several grills or holes would run faster than a hood scoop delete/block off or impreza hood
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