Under hood air pressure

General engine tech -- Drag Racing to Circle Track

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speedtalk
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Under hood air pressure

Post by speedtalk »

Anybody measure pressures under the hood, hood scoop, cowl, etc? What pressure range are you seeing?
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Post by maxracesoftware »

Peak_RamAir_HP_Gain = MPH * MPH * Peak_HP * .000001205

Peak_RamAir_HP_Gain = 190 * 190 * 700HP * .000001205

Peak_RamAir_HP_Gain = 30.45 HP gain from RamAir


general equation with atmospheric pressure set at 14.696 psi
in (.000001205) constant


2004 ProStock record (Greg Anderson)

60 Ft = .999
330 = 2.795
660 = 4.293 @ 164.17
1000 = 5.582
1320 = 6.670 @ 207.18

you might be interested in these 1/4 simulation runs
that show effects of Ram-Air inputs and data results

http://www.maxracesoftware.com/ETA_Win_1.jpg


this Link shows effects of Ram-Air on a ProStocker
without the Ram-Air input, the "ET/MPH Correlation"
wouldn't be as good as it is here in this DOS program

http://www.maxracesoftware.com/ETA_Dos_1.jpg


another Link shows basically same effects of Ram-Air
http://www.maxracesoftware.com/Quick_HP1.gif
MaxRace Software
PipeMax and ET_Analyst for DragRacers
https://www.maxracesoftwares.com
maxracesoftware
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Posts: 3627
Joined: Sat Feb 14, 2004 4:04 pm
Location: Abbeville, LA
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Post by maxracesoftware »

Ram_Air_psi = MPH * MPH * .000017762

Dynamic_Air_Pressure = MPH * MPH * .002556488

where Dynamic_Air_Pressure is in Lbs./SquareFoot

where .000017762 = .002556488 / 144 sq.inches per sq. foot
MaxRace Software
PipeMax and ET_Analyst for DragRacers
https://www.maxracesoftwares.com
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