08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

greddy bov and do i need a tune?

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Old 06-08-2018, 02:11 PM
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greddy bov and do i need a tune?

looking to buy a greddy type s bov for my car but i dont know where i can buy the intercooler piping with the greddy flange.anyone know where i can it? and if i need a tune too?.ive did research but i get mixed answers on people saying u dont need a tune.but in other threads it say u need a tune.thanks for advice in advanced.
Old 06-08-2018, 02:15 PM
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Don't get a greddy bov, they leak like a seive
Old 06-08-2018, 04:35 PM
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Originally Posted by ECaulk
Don't get a greddy bov, they leak like a seive
im actually looking to get this NGR Performance Type-S Turbo Blow Off Valve.
Old 06-08-2018, 04:46 PM
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Why? The stock BPV diverts enough air. Venting air to the atmosphere after the mass airflow sensor has already sent a signal to the ECU to calculate fuel needs based on the air amount will only throw off the air fuel ratio. Some say it's not much and only throws it off during shifts when you let off. Now if you plan to relocate the Mass Airflow Sensor and have the blow off valve before the MAS, shouldn't screw up anything. might need a retune. These cars are finicky.
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