Carburettor style Meth/Water Injection idea
Posted by alg_alex@reddit | projectcar | View on Reddit | 11 comments
As I was doing some looking around about meth/water injections, I personally think one of the biggest cons about the tune is that it has to run a line through the car and also I've heard that the pumps do get faulty as well.
As myself having a bit of experience with older motorcycles, Ive always loved the mechanical simplicity of the carburettor and how it works and quickly realized that much of the same principles could be applied to the meth/water injection. Carbs of course have a lower precision and sub optimal amount of spray, but from my understanding, meth/water injection doesn't need that amount of precision, and would most likely not have a big problem if you tune the carb to spray the meth/water injection at the target higher rpms where knocking, pre detonation and heat is a problem.
It feels that it would be really nice idea to stick a carb jet somewhere in the intake or the manifold, no extra pumps and wiring, maybe just a solenoid to stop the system if ever needed..?
Has anyone done anything similar before / would there be any kinks to this that I am not seeing?
CableMartini@reddit
thought this was posted in the wrong sub for a second lol
boostedmike1@reddit
You are right it would distribute the meth nicely only thing is you are adding a restriction anyone who needs water meth is running a tuned engine that are fighting restrictions in intakes that rob boost from cylinder causing them to turn the boost up creating more heat and hight iat last thing you want is to put a carb and another throttle blade in the way you just trying to rob heat from the charge pressure thats why they come on a a certain boost level
Boat_Liberalism@reddit
I don't think you'd need another throttle plate, just a venturi right?
alg_alex@reddit (OP)
Yes, the air intake amount controlled by the main intake throttle plate should theoretically control the meth/water injecting amount too?
boostedmike1@reddit
You only have it come on at a certain boost level , you are just adding a restriction the water meth kits are controlled the same way you trying to replicate they are metered by a carb jet you still need a rising rate fuel pressure regulator a pump a blow through carb to pull apart if you remove the throttle blade you got loads of uneven surface you would want to smooth out .less control because you got the bowl, floats ,idle circuits to think about
isthatsuperman@reddit
You could skip the pump and run a pressurized system, like NOS.
alg_alex@reddit (OP)
I feel that the pressurized system should also be another something to maintain, pressurized pipes and tanks could be a hassle
freelance-lumberjack@reddit
You still need a pump or do a float and bowl and tank above the new meth venturi.
Unless you're attempting a fully mechanical system, I'd just run a pressure pump and injector instead of low pressure pump, venturi,jet, float,bowl.
isthatsuperman@reddit
No matter what you do, it will be a hassle. If you don’t want a hassle, don’t do meth injection.
pistonsoffury@reddit
How would this carb jet receive the meth/water and ensure it has the right pressure to be able to actually inject it into the intake? That sounds like it would require lines and pump.
I think you're attempting to reinvent the wheel here. Except your new wheel concept is shaped like a square.
FocusedADD@reddit
So you're going to stick a jet anywhere you please? Just drill and tap a hole for a jet? How exactly is this supposed to work? Stick a carburetor in line with the rest of the intake? A carburetor sized to flow enough for maybe 700cc? You're asking this mechanical device to operate completely differently from what it was designed.
There's a reason Snow and the like offer what they do, and it's because it works and works well in the tight confines of an engine bay.
Now if you mean to start from scratch and build a carburetor specific to this yes, the principals of carburetion would still apply, they're just fluid dynamics and physics. Unfortunately the fluid dynamics and physics still apply. You'll want to read up on why you need to take care when using a dry intake for a wet intake application. Also when to use what meth spray pattern (fine fog vs wet garden sprinkler) for which effect and application.