Pontiac Solstice Forum - View Single Post - Nitrous, DI, a Turbo, and you. (advanced)

Quote:

Originally Posted by Critterman

Speaking from absolutely no experience just observations. Local tuners with 7 to 9 second turboed car use an alchohol spray vice N02. The alchohol cools the intake charge and seems to burn hoter if that makes any sense. They spray just before the throttle body.

Sometimes alchohol is used instead of fuel because of it's higher octane rating. Once the charge is ignited, pressures ramp up quickly in the cylinder, sometimes causing the remaining charge to detonate. Alcohol will delay this flash point.

This is actually a very good idea for our already high compression engines. Now that you've brought it up, if I were to consider NOX, I'd couple it with alcohol for this very reason.

"...before the throttle body."? I've seen this set up (for alcohol and fuel) in a plate upon which the throttle body sits, so it's after the throttle body.

Injecting before the throttle body has a couple of downsides...

First, on a carburated engine the alcohol/NOX mix will screw up the vaporization of fuel. Remember that the carburator jets are trying to spray out fuel with the goal of it becoming vapor by the time it reaches the cylinders. If you're evaporating alchohol and injecting a charge of NOX, say goodbye to any chances of proper vaporization.

Oh, sure... it will work... the car will take off like hell as it burns alcohol and NOX, but you'll have liquid fuel and incomplete combustion leaving nasty deposits all over the place.

Second, if it's humid outside, the NOX will immediately precipitate and crystalize the moisture in the air. This is the white smoke you see when you spray it. NOX is invisible. It's the water and ice particles that you see.

It will be like spray painting with ice. Doing this in the intake manifold is no problem because the ice will melt VERY quickly due to the high heat. But doing this into the throttle body could be ugly. There is already a temperature drop at the throttle body. In fact, icing is already an issue. If you spray paint ice on it, that ice is going to stick around much longer than we'd like.

__________________
Disclaimers:
1) This in no way constitutes an admission of modification of any vehicle in my posession. This and other posts submitted on this forum simply represent an attempt to gain acceptance from a peer group and are to be considered fictitious.
2) This is not professional advice. This is casual conversation.

Last edited by Maika'i GXP : 08-31-2007 at 08:53 AM.

	Maika'i GXP Member Join Date: Sep 2006 Location: Long Island, NY... a sister island to the Hawaiian chain. ;-)	Quote: Originally Posted by Critterman Speaking from absolutely no experience just observations. Local tuners with 7 to 9 second turboed car use an alchohol spray vice N02. The alchohol cools the intake charge and seems to burn hoter if that makes any sense. They spray just before the throttle body. Sometimes alchohol is used instead of fuel because of it's higher octane rating. Once the charge is ignited, pressures ramp up quickly in the cylinder, sometimes causing the remaining charge to detonate. Alcohol will delay this flash point. This is actually a very good idea for our already high compression engines. Now that you've brought it up, if I were to consider NOX, I'd couple it with alcohol for this very reason. "...before the throttle body."? I've seen this set up (for alcohol and fuel) in a plate upon which the throttle body sits, so it's after the throttle body. Injecting before the throttle body has a couple of downsides... First, on a carburated engine the alcohol/NOX mix will screw up the vaporization of fuel. Remember that the carburator jets are trying to spray out fuel with the goal of it becoming vapor by the time it reaches the cylinders. If you're evaporating alchohol and injecting a charge of NOX, say goodbye to any chances of proper vaporization. Oh, sure... it will work... the car will take off like hell as it burns alcohol and NOX, but you'll have liquid fuel and incomplete combustion leaving nasty deposits all over the place. Second, if it's humid outside, the NOX will immediately precipitate and crystalize the moisture in the air. This is the white smoke you see when you spray it. NOX is invisible. It's the water and ice particles that you see. It will be like spray painting with ice. Doing this in the intake manifold is no problem because the ice will melt VERY quickly due to the high heat. But doing this into the throttle body could be ugly. There is already a temperature drop at the throttle body. In fact, icing is already an issue. If you spray paint ice on it, that ice is going to stick around much longer than we'd like. __________________ Disclaimers: 1) This in no way constitutes an admission of modification of any vehicle in my posession. This and other posts submitted on this forum simply represent an attempt to gain acceptance from a peer group and are to be considered fictitious. 2) This is not professional advice. This is casual conversation. Last edited by Maika'i GXP : 08-31-2007 at 08:53 AM.