Menu
Home
Post Something
Forums
Current Activity
New posts
Search forums
What's new
New posts
Latest activity
News & Features
The Marketplace
Cars for Sale
Engine and Performance
Chassis and Wheels
Exterior and Body
Interior and Cockpit
ICE - In Car Entertainment
Car Shops and Services
Toys and Wares
All Other Stuff
Jobs and Vacancies
Looking For
Members
Log in
Register
What's new
Search
Search
Search titles only
By:
Current Activity
New posts
Search forums
Menu
Log in
Register
Reply to thread
See what others are reading now! Try Forums >
Current Activity
Home
Forums
Main Forums
Interests
Do-It-Yourself Garage
DIY Water Injected
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="drexchan" data-source="post: 193742" data-attributes="member: 6936"><p>kabu,</p><p></p><p>some one has explained it before me. FYI, muatan haba tentu is "specific heat capacity".</p><p></p><p>I have done some researched on the water vapour injection as well. And i already have the components in my store. It's a matter of time to assemble it.</p><p></p><p>As you know, what we need to do is to unplug the crankcase ventilation hose, and connect the intake hose (just before the TB) to the water reservoir using a longer hose.</p><p></p><p>The air will be drawn-in via a small filter and bubbled through the water using a fish-stone. Since the air is hot, it will transfer some heat to the water and eventually evaporates it. The vapour of water is then collected at the top of the container and is sucked into the manifold.</p><p></p><p>Yes, the vacuum effect will be greatest at part-throotle, but not at idling nor full-throttle. </p><p></p><p>The amount of air being sucked-in can be controlled using a valve just after the filter. For safety reason, an additional valve after the container can be added.</p><p></p><p>-----------------------------------------------------------------------------------------------</p><p>*the reason why I am still thinking of whether to do it or not:</p><p></p><p>Injecting additional air (with water vapour) AFTER the MAF will just lean up the mixture. </p><p></p><p>This is not a problem at idling because: 1. engine idling runs on closed-loop, 2. the injection point is before the butterfly. Any variation in A/F ratio during closed-loop can be rectify by the ECU as long as the variation is not too large.</p><p></p><p>But this is a problem during part-throttle, i.e. during highway cruising, because the engine is running on open-loops (for Siemen's ECU) now. During open-loop, the engine runs on default mapping. The variation in A/F ratio will not be rectify. </p><p></p><p>The results of this could be either (depends on the design of the ECU):</p><p></p><p>1. leaner burning that create more heat, but is 'cooled-down' by the water vapour. So overall effect will be better fuel economy at highway cruising due to a 'better' burning ---> the objective of this modification is achieved. But how much is the ratio of H2O/air to be injected (which is hard to control) to justify the additional heat (lean burning) and cooling effect (H2O high heat capacity) is a BIG QUESTION.</p><p></p><p>2. Well, some ECUs learn. These ECUs are mainly closed-loops ECUs. During part-throttle situation as i have described above, the ECU will make correction on the A/F ration based on the mapping, and if the 'error' occurs everytime, the ECU will make that as the defaut setting, and a new map is refered ---> You will just lean-up everything!</p><p></p><p>----------------------------------------------------------------------------------------------</p><p></p><p>I have no idea how exactly my ECU works.. that's why the project is still on-hold.</p></blockquote><p></p>
[QUOTE="drexchan, post: 193742, member: 6936"] kabu, some one has explained it before me. FYI, muatan haba tentu is "specific heat capacity". I have done some researched on the water vapour injection as well. And i already have the components in my store. It's a matter of time to assemble it. As you know, what we need to do is to unplug the crankcase ventilation hose, and connect the intake hose (just before the TB) to the water reservoir using a longer hose. The air will be drawn-in via a small filter and bubbled through the water using a fish-stone. Since the air is hot, it will transfer some heat to the water and eventually evaporates it. The vapour of water is then collected at the top of the container and is sucked into the manifold. Yes, the vacuum effect will be greatest at part-throotle, but not at idling nor full-throttle. The amount of air being sucked-in can be controlled using a valve just after the filter. For safety reason, an additional valve after the container can be added. ----------------------------------------------------------------------------------------------- *the reason why I am still thinking of whether to do it or not: Injecting additional air (with water vapour) AFTER the MAF will just lean up the mixture. This is not a problem at idling because: 1. engine idling runs on closed-loop, 2. the injection point is before the butterfly. Any variation in A/F ratio during closed-loop can be rectify by the ECU as long as the variation is not too large. But this is a problem during part-throttle, i.e. during highway cruising, because the engine is running on open-loops (for Siemen's ECU) now. During open-loop, the engine runs on default mapping. The variation in A/F ratio will not be rectify. The results of this could be either (depends on the design of the ECU): 1. leaner burning that create more heat, but is 'cooled-down' by the water vapour. So overall effect will be better fuel economy at highway cruising due to a 'better' burning ---> the objective of this modification is achieved. But how much is the ratio of H2O/air to be injected (which is hard to control) to justify the additional heat (lean burning) and cooling effect (H2O high heat capacity) is a BIG QUESTION. 2. Well, some ECUs learn. These ECUs are mainly closed-loops ECUs. During part-throttle situation as i have described above, the ECU will make correction on the A/F ration based on the mapping, and if the 'error' occurs everytime, the ECU will make that as the defaut setting, and a new map is refered ---> You will just lean-up everything! ---------------------------------------------------------------------------------------------- I have no idea how exactly my ECU works.. that's why the project is still on-hold. [/QUOTE]
Insert quotes…
Verification
Post reply
The Marketplace Latest
original rare Rays Volk Racing CE28 17x8jj offset...
Started by
david tao
Chassis and Wheels
Evasive EVS Tuning Carbon Body Kit Honda Civic Type...
Started by
aycy
Exterior and Body
Mugen MS-C Full Bucket Seat Civic Type R FL5 FK8
Started by
aycy
Engine and Performance
Boost Logic Boostlogic Oil Cooler Kit R35 GTR GTR35
Started by
aycy
Engine and Performance
Linney IHI 800WHP Turbo Kit R35 GTR35 GTR
Started by
aycy
Engine and Performance
Varis R35 GTR GTR35 Front Bumper
Started by
aycy
Exterior and Body
HKS Spec R Titanium Exhaust with Y pipe R35 GTR GTR35
Started by
aycy
Engine and Performance
2016 BMW 120i LCI M Sport F20 1.6 Auto
Started by
aycy
Cars for sale
GR Yaris H&R Front Rear Anti Roll Bar
Started by
aycy
Chassis and Wheels
BBS RI-A 10J God Spec FK8 FL5 Honda Civic Type R...
Started by
aycy
Chassis and Wheels
Posts refresh every 5 minutes
camber adjustment
hi guys,
anyone knows if is there anyway to adjust camber without camber kit/ changing ride height?
my camber is very close to 0 (still in negative), due to winding road here, i'm keen to try slighty more camber...
Shell offers RM50,000 for country’s most frugal driver
The Shell FuelSave Challenge is back for 2011...
[WtB]350 stuff
im looking for twin turbo,full dual exhaust ,and engine parts if you have please sen to
[email protected]
Recent Posts
Looking for 2.5-16 cosworth halfcut for 190E
Started by
Tuanku.J
Euro
Thrills and Spills at Zhuhai: Porsche Carrera Cup Asia Rounds 3 & 4 Recap
Started by
The_Mechanic
News and Features
Proton Records High Demand for S70 with 1 Unit Booked every 4 minutes
Started by
The_Mechanic
News and Features
Toyota Malaysia Enters Regional GT Racing with TGR Racing Malaysia
Started by
The_Mechanic
News and Features
Home Win and Double Podium for Akash Nandy at Sepang Season Opener
Started by
The_Mechanic
News and Features
Search
Online now
Enjoying Zerotohundred?
Log-in
for an ad-less experience
Home
Forums
Main Forums
Interests
Do-It-Yourself Garage
DIY Water Injected