[Mel Adjusted]

When going to large amounts of Nitrous you need to retard the timing and fatten up your mixture to keep temps down in the combustion chamber.
Has anyone had any experiance with big loads of nitrous and water/alcohol injection.
Were running a 75 shot per cylinder and it would be super if we could drop our combustion chamber temps and advance our timing and lean out our mixturs a tad. The power gains would be great.

[dvldoc]

We do have people that run both together, I use to run a 125shot with 100% methanol and had good gains and no knock with it.

I would not suggest direct port with the alcohol injection for this because you want more time for it to atomize with the air stream before it hits the combustion chambers for max cooling and mixing with the air stream.

[Mel Adjusted]

I hear ya... were running direct port spray to each cylinder. I have dual throttle bodys so would it be better to injet before the throttle bodys? I figure we run between 2 and 2 1/2 bar (equivalent) of oxygen bearing air and 14.5:1 compression ratio.
I need to figure how to inject Water/alcohol progressively as we run the spray in 3 stages.
Right now were running in the hi 9s in the 1/4 and I know if we can tweek the timing and mixture and put the car on a diet we might dip into the low 9's or hi 8's.

[dvldoc]

I would have to see your set up to tell you for sure but just before each throttle bodies is a good place to start, Doing progressive in 3 stages well that would be a bit of a trick.

[Mel Adjusted]

Our 1st stage is a Zex dry system using a air intake amplifier with a 75 HP shot of spray. The 2nd stage is a wet system with a 25 HP shot to each cylinder, and the 3rd stage is a wet system with a 50 HP shot to each cylinder.
I don't need a W/A injection for the 1st stage but for the 2nd and 3rd yes.
If you look at spraying as liquid or chemical supercharging it makes working with the engine much simpler. We started by converting how much air a turbo put into a engine and how much fuel was required for best power and went from there.
Now if we can just control our combustion chamber temps with W/A injection our only limiting factor will be pushing the crank out the oil pan (blowing the engine).
I figure we'll need 6 gph W/A for our 2 stage and 13.5 gph for our 3rd stage. that shouldn't be that hard to pull off.

[Racer704]

Go to a 1 stage progressed nitrous system, this will do several things.
1. Progressive system when done right and the right parts are used can run more timing and more nitrous.

2. It will be a softer and alot more traction and user friendly on your drivetrain.

3. You dont have to pull as much timing out usally.

Johnny Barb

[kingots2004]

i would wire in each alcohol relay to mirror the nitrous relay for each stage.very easy to do

[Mel Adjusted]

Originally Posted by kingots2004

i would wire in each alcohol relay to mirror the nitrous relay for each stage.very easy to do

So what your saying is run multi-stage W/A injection and wire the relays togather? sounds like a winner to me....