Supercharger and Nitrous Questions

MustangMatt96GT · January 25th, 2007, 08:48 PM

Ok so when a supercharger is placed on a car, it is compressing the air that is already in the atmosphere right. Cuz right of the bat at sea level every car is running roughly 14.7 psi of air(that is the air pressure at sea level and at 25 degrees celcious. I was thinking that what if you just compressed oxygen so much that the engine ran better, kinda like nitrous, but that is roughly 80% nitrogen and 20% oxygen. If im not mistaken the only thing that helps the engine burn more effeciently is the oxygen in nitrous, so why not just use pure oxygen and not use nearly as much as nitrous? Well anyway i may be just out of my mind, but i have been wonding for quite a while nobody has been able to answer me.

WilltheThrill · January 25th, 2007, 09:04 PM

What you're sayin makes sense cuz oxygen is one of the 3 elements required to make fire, Ive wondered too if it would help just shooting pure oxygen into a engine, lol

03 R Code · January 26th, 2007, 08:31 AM

This should help.

The advantage of nitrous is that the nitrogen acts as a combustion buffer, slowing the resultant pressure rise that occurs when the oxygen-enhanced air/fuel charge is ignited. This is why N2O is a far better choice than injecting pure oxygen. With pure oxygen, the resulting combustion process would be so violent that it would immediately destroy the engine. Even at the same power level, nitrous creates a much quicker cylinder-pressure rise than either a normally aspirated or supercharged engine. This is the big reason why nitrous engines demand less ignition timing. Optimal cylinder pressure should occur with the piston at roughly 10 to 15 degrees after top dead center (ATDC) to take maximum advantage of the leverage offered by the crankshaft as cylinder pressure pushes down on the piston. This is why over-advanced ignition timing, even in a normally aspirated engine, makes less power because the ignition begins the combustion process so early that the engine is working against cylinder pressure as the piston approaches TDC.

03 R Code · January 26th, 2007, 08:32 AM

This is where I found the article. There's a whole write up on there. Pretty informative.

http://www.chevyhiperformance.com/te...ide/index.html

MustangMatt96GT · January 26th, 2007, 07:44 PM

Thanks man its a great read! :wink

WilltheThrill · January 26th, 2007, 07:47 PM

thats interesting, thanx bro

January 25th, 2007, 08:48 PM	#1
MustangMatt96GT I Post Entirely Way Too Much 1996 Mustang GT 13.023@103.46 @ 5800 FT Join Date: Dec 2006 Location: Lakewood, CO Posts: 7,147	Supercharger and Nitrous Questions Ok so when a supercharger is placed on a car, it is compressing the air that is already in the atmosphere right. Cuz right of the bat at sea level every car is running roughly 14.7 psi of air(that is the air pressure at sea level and at 25 degrees celcious. I was thinking that what if you just compressed oxygen so much that the engine ran better, kinda like nitrous, but that is roughly 80% nitrogen and 20% oxygen. If im not mistaken the only thing that helps the engine burn more effeciently is the oxygen in nitrous, so why not just use pure oxygen and not use nearly as much as nitrous? Well anyway i may be just out of my mind, but i have been wonding for quite a while nobody has been able to answer me.

January 25th, 2007, 09:04 PM	#2
WilltheThrill MM Fanatic 03 Cobra 13.2 @ 108 at 2710 ft. elevation Join Date: Dec 2006 Location: southern california Posts: 4,115	What you're sayin makes sense cuz oxygen is one of the 3 elements required to make fire, Ive wondered too if it would help just shooting pure oxygen into a engine, lol __________________ 03 cobra:soon to be pullied/tuned by Greg @ RET-clutch-Xpipe-flows w/3" piping out back-adj. clutch cable with quadrant-BBK firewall adjuster 91 prelude: CAI-full exhaust-clutch-Eibach lowering springs

January 26th, 2007, 07:47 PM	#6
WilltheThrill MM Fanatic 03 Cobra 13.2 @ 108 at 2710 ft. elevation Join Date: Dec 2006 Location: southern california Posts: 4,115	thats interesting, thanx bro __________________ 03 cobra:soon to be pullied/tuned by Greg @ RET-clutch-Xpipe-flows w/3" piping out back-adj. clutch cable with quadrant-BBK firewall adjuster 91 prelude: CAI-full exhaust-clutch-Eibach lowering springs

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January 26th, 2007, 08:31 AM	#3
03 R Code Hardcore Enthusiast unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 2,842	This should help. The advantage of nitrous is that the nitrogen acts as a combustion buffer, slowing the resultant pressure rise that occurs when the oxygen-enhanced air/fuel charge is ignited. This is why N2O is a far better choice than injecting pure oxygen. With pure oxygen, the resulting combustion process would be so violent that it would immediately destroy the engine. Even at the same power level, nitrous creates a much quicker cylinder-pressure rise than either a normally aspirated or supercharged engine. This is the big reason why nitrous engines demand less ignition timing. Optimal cylinder pressure should occur with the piston at roughly 10 to 15 degrees after top dead center (ATDC) to take maximum advantage of the leverage offered by the crankshaft as cylinder pressure pushes down on the piston. This is why over-advanced ignition timing, even in a normally aspirated engine, makes less power because the ignition begins the combustion process so early that the engine is working against cylinder pressure as the piston approaches TDC.

January 26th, 2007, 08:32 AM	#4
03 R Code Hardcore Enthusiast unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 2,842	This is where I found the article. There's a whole write up on there. Pretty informative. http://www.chevyhiperformance.com/te...ide/index.html

January 26th, 2007, 07:44 PM	#5
MustangMatt96GT I Post Entirely Way Too Much 1996 Mustang GT 13.023@103.46 @ 5800 FT Join Date: Dec 2006 Location: Lakewood, CO Posts: 7,147	Thanks man its a great read! :wink

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