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In what way?

They vent air and it's driveability - nothing you can test on a dyno really.

Well I was running twin blitz vented. then forged my engine and had lots of stalling issues, turn out one of my blitz was jammed so I took it off and put a OEM instead. so I'm running both. However, my tuner didn't told me anything about beeing more eaiser to tune or not.

My car can still stall but maybe 1 times out of 10 during braking instead of 8 times out of 10.

So I mean, if it's possible to tune the car vented or not with the same result. and no one can prove that recirculate will yeild a 200rpm increase in response and I dont know... 10whp more. And your car doesnt stall on every corner. Why so much peoples sh*t bricks on ppl running vented !? I can't recall anyone showing a bck to back dyno proving vented is worse.

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had the same problem in my old supra. turns out it was my ecu playing up. wasnt sendin the correct voltage to my injectors and therefore werent pumping enough fuel and would cause it to stall at the lights and stuff.

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