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Old 04-07-2011, 09:21 AM   #1
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Smile Punching a hole in your engine to increase MPG?

Okay, this sounds drastic, but a few years ago I was talking to this guy who had a standard sedan style Toyota Yaris and swore he got 50+ mpg. He had punched a hole in some part of the engine (wish I could recall where) to let in more air, and although he lost power...he felt the increase in mpg was well worth it. Does this make sense to anyone? I'm leery to make a hole in my engine, but....but.....

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Old 04-07-2011, 09:52 AM   #2
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Re: Punching a hole in your engine to increase MPG?

Sounds like he might have put a hole in the airbox and setup a warm-air intake. It works with some cars.
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Old 04-07-2011, 12:18 PM   #3
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Re: Punching a hole in your engine to increase MPG?

I put a 4" hole in the airbox of my truck, and blocked off the factory cool air intake to force the engine to suck warmer air from the engine bay. I really didn't see any gains on highway mileage, but seemed to help in city driving.
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Old 04-07-2011, 07:21 PM   #4
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Re: Punching a hole in your engine to increase MPG?

I saw no benefits from installing a warm air intake on my Scion xB.
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Old 04-07-2011, 08:28 PM   #5
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Re: Punching a hole in your engine to increase MPG?

If the engine was getting more air the ECU would just add more fuel to keep the air fuel ratio correct. The WAI is the only thing I can think of that he may have been talking about, but that wouldn't be giving the engine more air, just warm, less dense air.
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Old 04-12-2011, 11:31 AM   #6
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Re: Punching a hole in your engine to increase MPG?

Vacuum Leak! You could be like the Dyno Valve guys...They made a vacuum leak in a 72 VW and thought.... think they saved the world.
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Old 04-12-2011, 12:58 PM   #7
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Re: Punching a hole in your engine to increase MPG?

I'm sold on the idea. brb
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Old 04-14-2011, 05:55 AM   #8
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Re: Punching a hole in your engine to increase MPG?

Quote:
Originally Posted by tjts1 View Post
I'm sold on the idea. brb

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