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

I am now running a car with a a dual stage progressive 350 (rwhp) shot and have experimented with NOS, NX and now WON systems. I can point out a couple of issues:

1. If you inject too far away from the throtle bodies, the fuel mixture will not be consistent and you can possibly have different a/f mixtures for different cylinders.

2. The burn rate on the DI engine is already optimized. Ignition timing is misleading because they are obtaining the max cylinder pressure (or burn rate) via the di, therefore, at wot very little advance is needed to obtain the max cylinder pressure.

3. The safest place for the sprayer is as close to the throttle body as possible as you will get maximum mixing at that point. The benefit is greater than that of cooling down the hard pipe. This also overcomes some of the reliability issues associated with injecting nitrous into the intake. When you inject in the intake there are multiple scenarios that can lead to engine failures.

If you want to mate up a nitrous system to the solstice, the WON (Wizard of Nitrous) systems would work well. They have a lot of advantages over NX and NOS and IMHO everyone else is a distant player or a niche supplier. I would start very carefully and edge your way up.

There is also an unknown factor in the a/f. The commanded a/f at wot is approximately 13-13.5 until about 4800 rpm's, at that point it changes to 12-12.5 and it is not a gentle transition. There is a reason that is most probably deals with cylinder temperature, that is the one point that scares me as it relates to nitrous. It would be nice if you experimented a little and lead the way LOL.

	Jack B Member Join Date: May 2006 Location: NE Ohio	I am now running a car with a a dual stage progressive 350 (rwhp) shot and have experimented with NOS, NX and now WON systems. I can point out a couple of issues: 1. If you inject too far away from the throtle bodies, the fuel mixture will not be consistent and you can possibly have different a/f mixtures for different cylinders. 2. The burn rate on the DI engine is already optimized. Ignition timing is misleading because they are obtaining the max cylinder pressure (or burn rate) via the di, therefore, at wot very little advance is needed to obtain the max cylinder pressure. 3. The safest place for the sprayer is as close to the throttle body as possible as you will get maximum mixing at that point. The benefit is greater than that of cooling down the hard pipe. This also overcomes some of the reliability issues associated with injecting nitrous into the intake. When you inject in the intake there are multiple scenarios that can lead to engine failures. If you want to mate up a nitrous system to the solstice, the WON (Wizard of Nitrous) systems would work well. They have a lot of advantages over NX and NOS and IMHO everyone else is a distant player or a niche supplier. I would start very carefully and edge your way up. There is also an unknown factor in the a/f. The commanded a/f at wot is approximately 13-13.5 until about 4800 rpm's, at that point it changes to 12-12.5 and it is not a gentle transition. There is a reason that is most probably deals with cylinder temperature, that is the one point that scares me as it relates to nitrous. It would be nice if you experimented a little and lead the way LOL.