I'm putting together a kit right now to install within the next week or so and am having a hard time understanding if I'm overkilling or not. I'm going to run the devils own pump and dual DO14 nozzles. I'll either be putting them right before the throttle body after the IAT sensor or right after the throttle body in the intake. My first choice would be putting them in the intake.

My question is more about flow to each nozzle and how much volume is too much. I'm going to run a solenoid in my kit whether I put the nozzles behind or in front of the tb. If I run a single solenoid and dual nozzles, I'm nervous about not having enough volume to each nozzle. I would have to run a -4 line from the pump, to the solenoid, and then a Y'd -4 line to each nozzle. That seems kind of restrictive to me but I don't really know how these methanol pumps work. That makes me think about running dual solenoids so I can run -6 from the pump, Y'd to two -4 lines to each solenoid, then -4 out of the solenoids to each nozzle. That makes a lot more sense to me in terms of fluid restriction and flow.

Is the dual solenoid idea way too overkill for the methanol system?

 

I would not put inside the intake.
You want to give meth spray as much time to expand as possible.

 

My question is more with the volume and pressure the nozzle will see/need with one or two solenoids. Not the placement. Placement is set.

 

I am curious why your considering using solenoids much less 2 of them. I don't have a solenoid on my kit.

 

First and foremost, I'm running a solenoid because I'm most likley going to run the nozzles behind the throttle body. Since the nozzles will be in vacuum all the time, I have to run a solenoid to prevent siphoning. Another reason is that you get much better control over when your system is spraying. When you let out of the pedal and and go out of boost, your system is going to continue to spray until all the pressure is out of the line from pump to your nozzle. When running a solenoid as close to the nozzle as possible, it activates and shuts off flow almost instantly. Not that it makes a huge difference since you will be in decel but you get a lot better control over your kit.

 

Just found this vid showing what Im talking about.

 

I understand that it's not your real concern... But putting a single or even a dual nozzle system inside the intake is a horrible idea. Talk about guaranteeing you don't get even distribution...

Spray it nearly as far from the TB as you can and let it atomize as much as possible. After the intercooler but before the tb. Hell why not spray it prior to the IAT sensor too? It shouldn't harm it and it will help the computer to know the IAT's are lower. Then you don't have to screw with the IAT table as much.

And if you have it set properly with the pump as the low point and the nozzles as the absolute high point there should not be much worry for dripping.

 

I'm not a fan of spraying before the IAT. I think its a joke when these guys say wow, my IAT's drop down to 30 degrees when I am spraying. Well yea, no ****, cause you are spraying meth all over the sensor so its going to get rather cold. There just isn't a good way to see what your real IAT's are when you are spraying pre sensor. That being said, the only other place I would consider spraying is directly after the intercooler with staggered nozzles.

The reason I want to spray right behind the throttle body is because of the intake I'm running. With the holley, I will have a heat soak issue all the time. With the heat the intake charge will see through the intake and the long runners, I don't think I will have an automatization/evaporation issue by the time it enters the cylinder. Even distribution, maybe... But I really would like to take the heat out of the intake and the actual cylinder. I just see that being more beneficial than spraying two big nozzles into the walls of a tiny intake tube and then having that cooler air charge having to run through a hot intake/cylinder. Why not cool the charge inside the intake and cylinder so it doesn't have a chance to heat back up before combustion. Everyones argument to that will be....even distribution.

Since I will only be spraying at high engine speeds, I just don't see distribution between cylinders being that big of a deal. The incoming air will be sucked through the intake so fast, I don't see the nozzles being able to target one cylinder more than any other. Of course I am probably wrong but I can't find any info proving it. I really wish I had a dyno to monitor the EGT at each cylinder and do some testing on nozzle placement with my personal set up. Has anyone had real personal experience with hot cylinders while spraying post throttle body?

I really like to try different things as you guys know. Playing with different set ups and seeing what works and doesn't work is just fun for me. I'm up for discussion though....

 

With that intake. You could do a direct port meth kit.
One nozzle per runner. And I would still do one pre tbody.

The heat you speak of. Not really an issue at speed. Stop and go sure.
But at heavy throttle the air is just moving to fast to pick up heat from the intake. I did a calculation years back when I was in nitrous land.
Air At the tbody to out the exhaust
at speed was in the .0X time line.

Testing is cool but gets expensive over time.

 

This. At WOT heat soak is such a smaller issue than people think. The problem is that your sensor gets heat soaked too so you often times havea false high reading... then the tune pulls timing. Hence why spraying some meth on it is not a bad idea. Spraying meth pre IAT sensor will give you a much better idea of the actual IAT's as they hit the motor than if it were sprayed post.