Looking for vacuum of intake? help please - Toyota Nation Forum : Toyota Car and Truck Forums

Mike8913 · 07-01-2008, 08:33 AM

Hi everyone

I'm new to the forum and I'm having a really difficult time finding a line on my intake that has suction, or vacuum. I tried patching right into the air box but there is'nt much there because there is already flow coming from the intake.

Are there any hookup that have more suction than others. For instance, would the exhaust recirculation have pull on it?

If you can provide pictures I would really appreciate it.

I own a 2002 LE by the way. Thanks.

TRD VVTi · 07-01-2008, 10:56 AM

What engine do you have?

What's the purpose of needing vacuum?

Mike8913 · 07-01-2008, 12:35 PM

it's the 4 cylinder. I'm not sure on the actual model name of the engine, i'm not up on those things. I need vacuum for a project involving water injection. I have it all together but havent been able to find suitable vacuum.

Tobeit · 07-01-2008, 12:39 PM

I am not an engine expert by any means...but water injection and intake together in one sentence sounds very wrong. Whats up with that?

Mike8913 · 07-01-2008, 12:45 PM

it's not straight water, you're effectively emulating 100% humidity into your intake by vaporizing water..... i can link you to my blog if you like for the project.

Tobeit · 07-01-2008, 01:04 PM

http://www.freepatentsonline.com/4557222.html

Is it worthwhile doing it? Whats the potential drawback? Shorter lifetime of critical engine parts?

Mike8913 · 07-01-2008, 01:12 PM

I believe it will be worthwhile doing. I should gain a small mileage boost and drastically decrease emissions. I will aslo be drawing excess hydrogen that is off-gassed by the battery along with the humidified air.

here's my blog for a little foreword on my project. My Blog

buno · 07-01-2008, 10:12 PM

Quote:

Originally Posted by Mike8913

I small mileage boost and drastically decrease emissions.

well thats worth it right there. Im glad your doing your part to not hurt our 5 billion year old planet. Your car alone will help it limp on for another 1 billion years. what would this world do without you?

warpedrotor · 07-01-2008, 10:27 PM

Quote:

Originally Posted by Mike8913

I believe it will be worthwhile doing. I should gain a small mileage boost and drastically decrease emissions. I will aslo be drawing excess hydrogen that is off-gassed by the battery along with the humidified air.

here's my blog for a little foreword on my project. My Blog

Metered water injection was used in WW2 aircraft that were supercharged or turbo charged to cool intakes and combustion temperatures during hard climbs etc.

A simple device was out there years ago that consisted of a ridgid container like a 16 oz jar filled with water and sealed except with two holes in the lid. One hole was connected to a vacuum line from the intake, the other had a small rubber hose pushed through it to down near the bottom and was connected to an aquarium airstone. The air passed through the airstone and bubble up throught the water and then get drawn into the engine. This way only a small amount of air with nearly 100% humidity was entering the intake, no actual water that could cause hydraulic lock and break a rod or something. I actually tried it, with an old Pontiac (350 SBC). It seemed to get better mileage and run a bit smoother but it could have been a placebo effect. I stopped using it because you had to check the water every fill up and it froze in the winter unless you mixed it with some sort of alcohol. As for gathering hydrogen off your battery, I don't think there is enough there to make much difference or how it would effect combustion.
Splitting hydrogen and oxygen by electrolysis would work; there is already a car out there (Japan) that claims to run on water; it must be this way, it looks like a Smart. Have fun experimenting.

Mike8913 · 07-02-2008, 08:35 AM

thanks. I'm not saying the hydrogen off the battery would make a dramatic difference, I'm just saying it's there and I might as well utilize it instead of letting it go to waste, dont think it can hurt.

Buno, I couldnt tell if that was sarcastic or not, but I'm going to take it as a complement.

Anyone have an explanation for me on where I might find vacuum on my intake?

warpedrotor · 07-02-2008, 08:53 AM

Not sarcastic, just explaining that this stuff has been around a long time with limited results, but occasionally, regular people hit on a break through in their backyards that could really change things, so stay optimistic, I'm sure TRD VVTi can explain the location of a vacuum source, I haven't looked under my hood more than to check the oil and change the air filter, my last 4 cars still had carburetors so vacuum lines were easy to splice into.

TRD VVTi · 07-02-2008, 10:49 AM

This is from another thread. The port and hose are circled in red.

You're wasting your time and many statements in you blog are incorrect. This paragraph is awful:

When gasoline is burned in the combustion chambers only about 30% is used to propel the vehicle, the rest of the fuel is used to cool down the combustion chamber. Water is something like 2000 times more efficient at cooling than gasoline. So, by injecting water vapor into the intake we can slow the burn of gasoline, effectively raising its octane rating, and cool the engine more efficiently than before. As a by product we have raised the octane rating which should slightly increase our mileage. That alone is something worth noting.

james399 · 07-02-2008, 01:28 PM

it is true that you can use electrolysis, to produce hydrogen cheaply and effectively and improve your mileage etc etc... but the hydrogen component when combusting will cause water to form, not enough that it will seize your motor, but it will cause faster corrosion of the metal parts in your engine... metal and water do not get along...

warpedrotor · 07-02-2008, 09:18 PM

When gasoline is burned in the combustion chambers only about 30% is used to propel the vehicle, the rest of the fuel is used to cool down the combustion chamber. Water is something like 2000 times more efficient at cooling than gasoline. So, by injecting water vapor into the intake we can slow the burn of gasoline, effectively raising its octane rating, and cool the engine more efficiently than before. As a by product we have raised the octane rating which should slightly increase our mileage. That alone is something worth noting.

This statement (probably made during 70s research) applies mostly to air-cooled engines, such as the radial engines in some WW2 fighters, and in lawnmowers and snowblowers, they need richer mixtures to help cool them. Camrys are water cooled and have advanced combution chamber designs and engine controls to make the most efficient use of the fuel they burn and reduce emmisions at the same time.