Comparing N02 to PSI

zepherman · 11-16-2001, 06:30 PM

how man psi from a turbo/supercharger would equal a 100 shot of N02?

Mach 1 · 11-17-2001, 02:13 AM

...theres quite a few variables to consider here. Blowers, turbos, etc...dont produce the same horsepower increase on different engines. A 15 psi blower will roughly double the horsepower of the engine its on. If its on a 200 horse N/A 302, and tuned properly, you should make around 400 horses. A 15 psi blower on a naturally aspirated 90 horsepower chevy cavalier will make around 180 horsepower. In one case, the blower makes 200 horses, in the other, 90 horses, both with 15 psi. Are you starting to get the idea....

Coupe5oh · 11-17-2001, 02:23 AM

A little off the subject, but how about both power adders? the big dogs around here are running an s-trim, with a 50 shot n20, a saleen 347, that bent some valves before he got it tuned, but it was going 137-140mph traps, before it broke, street driven with a/c and powersteering, and a couple ls1's running low 10's around 135 mph, most automatics, and blowing out rearends....doht!

its a blast watching these guys go at it though

PKRWUD · 11-17-2001, 05:59 AM

Mach 1 is right. At sea level, atmospheric pressure is 14.7:1 psi. For every pound of pressure (boost) you create above that, you increase the displacement of your engine. If your engine displaces 302 cubic inches at sea level (14.7:1 psi), then with 15 pounds of boost, which would double the atmospheric pressure, your engines displacement would also double, and become 604 cubic inches. The horsepower won't necessarily double, but the displacement does. Nitrous is just a way of adding extra oxygen in a controlled manner (the nitrogen controls the burn rate of the oxygen, so it doesn't just explode like pure oxygen would). Nitrous is more like having higher compression.

Take care,
-Chris

11-16-2001, 06:30 PM	#1
zepherman Registered Member Join Date: May 2001 Location: Oklahoma City OK USA Posts: 236	Comparing N02 to PSI how man psi from a turbo/supercharger would equal a 100 shot of N02? __________________ 90 GT 25th Anni. Did the AOD to T-5 swap, SPEC clutch, Steeda Tri-Ax shifter, BBK 2½ inch off-road H pipe, Flows, BBK 70mm TB/EGR, Ford Racing aluminim driveshaft, 3.55's, welded subframes, Ram Air, 3 core radiator, NOS dry kit 75 shot, and a K&N filter. 12.9 @ 108

11-17-2001, 02:13 AM	#2
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	...theres quite a few variables to consider here. Blowers, turbos, etc...dont produce the same horsepower increase on different engines. A 15 psi blower will roughly double the horsepower of the engine its on. If its on a 200 horse N/A 302, and tuned properly, you should make around 400 horses. A 15 psi blower on a naturally aspirated 90 horsepower chevy cavalier will make around 180 horsepower. In one case, the blower makes 200 horses, in the other, 90 horses, both with 15 psi. Are you starting to get the idea.... __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

11-17-2001, 02:23 AM	#3
Coupe5oh Registered Member Join Date: Nov 2001 Location: SanAntonio, Tx Posts: 734	A little off the subject, but how about both power adders? the big dogs around here are running an s-trim, with a 50 shot n20, a saleen 347, that bent some valves before he got it tuned, but it was going 137-140mph traps, before it broke, street driven with a/c and powersteering, and a couple ls1's running low 10's around 135 mph, most automatics, and blowing out rearends....doht! its a blast watching these guys go at it though __________________ Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer Race weight: 3,120 E.t-13.57 with 26x10.50's e.t. streets. 1.88 60' mph- 99.92 mph

11-17-2001, 05:59 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Mach 1 is right. At sea level, atmospheric pressure is 14.7:1 psi. For every pound of pressure (boost) you create above that, you increase the displacement of your engine. If your engine displaces 302 cubic inches at sea level (14.7:1 psi), then with 15 pounds of boost, which would double the atmospheric pressure, your engines displacement would also double, and become 604 cubic inches. The horsepower won't necessarily double, but the displacement does. Nitrous is just a way of adding extra oxygen in a controlled manner (the nitrogen controls the burn rate of the oxygen, so it doesn't just explode like pure oxygen would). Nitrous is more like having higher compression. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!