I ordered hypermax cowl induction
Cargo Master
Joined: Oct 2005
Posts: 2,298
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From: NJ
Jesse, the engine will only draw as much air as it needs. A simple example you can try, at rest while sitting with your mouth close breathe, then open your mouth halfway and breathe through it, then open your mouth wide and breath at the same resting rate. Your lungs won't get any more air as there was never any restriction, even with your mouth closed.
The only advantage you will see if potentially cooler air, and even then only if your cowl to hood seal is sealing properly. You'll get very hot air through the cowl if that seal is bad, particularly when at lower speed with the fan engaged.
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Senior User
Joined: May 2016
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I don't see how there would be any pressure in the cowl, it goes straight through large openings behind the fenders exiting into the floor vents and out the bottom of the fender area. Easy way to tell is plumb a boost gauge in there. I bet you won't even see it budge off zero.
Jesse, the engine will only draw as much air as it needs. A simple example you can try, at rest while sitting with your mouth close breathe, then open your mouth halfway and breathe through it, then open your mouth wide and breath at the same resting rate. Your lungs won't get any more air as there was never any restriction, even with your mouth closed.
The only advantage you will see if potentially cooler air, and even then only if your cowl to hood seal is sealing properly. You'll get very hot air through the cowl if that seal is bad, particularly when at lower speed with the fan engaged.
Jesse, the engine will only draw as much air as it needs. A simple example you can try, at rest while sitting with your mouth close breathe, then open your mouth halfway and breathe through it, then open your mouth wide and breath at the same resting rate. Your lungs won't get any more air as there was never any restriction, even with your mouth closed.
The only advantage you will see if potentially cooler air, and even then only if your cowl to hood seal is sealing properly. You'll get very hot air through the cowl if that seal is bad, particularly when at lower speed with the fan engaged.
Postmaster
Joined: Dec 2011
Posts: 3,860
Likes: 7
To be fair, off idle? Yeah, an IDI's getting a full charge of air. At 2500 RPM, though, your NA IDI is practically starving(and you can tell in the lost torque); anything you can do to get more air into that cylinder helps.
...Of course, why mess with small stuff when you can just take care of the problem? Add a turbocharger and you'll solve *all* of that high-rpm air flow issue.... because you'll be shoving it in real hard!
(It's pretty easy to see the difference in dyno curves, too - NA, the torque starts out high and drops with rev. Add a turbo and fuel to match? Now the torque starts out at the same NA level and goes straight /up/ till redline[or wherever you run out of fuel])
...Of course, why mess with small stuff when you can just take care of the problem? Add a turbocharger and you'll solve *all* of that high-rpm air flow issue.... because you'll be shoving it in real hard!
(It's pretty easy to see the difference in dyno curves, too - NA, the torque starts out high and drops with rev. Add a turbo and fuel to match? Now the torque starts out at the same NA level and goes straight /up/ till redline[or wherever you run out of fuel])
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1999 - 2003 7.3L Power Stroke Diesel
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Feb 15, 2016 01:42 PM
