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Found Cold Air= What % of horsepower ratio...

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Old Jan 26, 2009 | 07:07 PM
  #1  
neagan's Avatar
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From: Santa Rosa, Cali
Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
Found Cold Air= What % of horsepower ratio...

Y'all might already know this, but I didn't know the basic horsepower formula for cold air induction. So here it is out of Hot Rod Magazine:

Q: What is the effect of colder air and its ratio of engine horsepower increase by degree of temperature?

A: Assuming blah-blah-blah; every 10*-F temp drop is worth a 1% hp gian. For example~ if my 1988 TPI engine compartment is 200 degrees and it makes 240hp, by dropping the temperature just 50* with a Ram Air/Cold Airbox setup it becomes worth a 5% hp gain = That's 12 extra hp!

Now for when Travis gets his SC dialed in @ 500hp it will be like he added an extra 25hp punch!!
That made sense to me....
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Old Jan 26, 2009 | 07:14 PM
  #2  
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From: Greenwood SC
Car: 86' Z28
Engine: 350
Transmission: 700r4
Axle/Gears: 2.73 (for now)
Re: Found Cold Air= What % of horsepower ratio...

didn't know that, pretty interesting
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Old Jan 26, 2009 | 10:07 PM
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From: California, Sacrameto
Car: 88 gta
Engine: 350 tpi
Transmission: 700r4
Re: Found Cold Air= What % of horsepower ratio...

cool info
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Old Jan 26, 2009 | 10:41 PM
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From: Woodland, CA
Car: '02 Z06
Engine: L33 5.7
Transmission: T56
Axle/Gears: Stock IRS
Re: Found Cold Air= What % of horsepower ratio...

about 300hp shy of my true goals, but i understand
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Old Jan 26, 2009 | 11:43 PM
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From: Santa Rosa, Cali
Car: 1988 IROC 5.7 Money Pit
Engine: (being built; modified TPI ZZ4
Transmission: 2200 stall/ stage 3 700R4
Axle/Gears: freshened 3.27 in 9.bolt/
Re: Found Cold Air= What % of horsepower ratio...

Originally Posted by TraviZ
about 300hp shy of my true goals, but i understand
Your killing me......
(oh, hey: my sister said you didn't pay her for last night yet....)
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Old Jan 30, 2009 | 08:58 AM
  #6  
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From: The Sticks, Ca.
Car: '79 Camaro; '84 Z28
Engine: 350; none
Transmission: TH-350, 2500 stall; none
Axle/Gears: posi, 3.08; disc, 3.23
Re: Found Cold Air= What % of horsepower ratio...

I love the paraphrasing! Good info though. I even noticed some change in performance going from a drop-base air cleaner to a standard height to push the air cleaner up into the cowl of my hood.
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