Absolutely incorrect!!

A water injection or water/meth system mounted just behind the Throttle Body injecting into the complete intake system will not only increase the performance level of an engine but clean up carbon deposit in the combustion chamber include the top of pistons the top ring land both intake and exhaust valve and yup even the intake valve on direct port engines.

Water injection has been used dating to WWII and as for using water to clean carbon Old School Auto Mechanic often would pour through the carburetor of a running engine to quickie remove large carbon build up. As for Direct and F?I engines it has been used to both increase the support of power,reduce pre-ignition and keeping the complete intake and exhaust systems clean!

IF member have never used a "MODERN" (say water injection system from about the mid 90"S earlier we all were still learning how to offer a good working system for DIY) please DON"T assume what you think does not work! LOL

 

LOL, okay, I should have written, "Nothing you can do about it without altering the engine or the intake."

 

Well ok .....its better coming from you. Most of the time you are usually better at choosing your words. Time for more coffee my friend?

Maybe using words like "without adding" ?

Here is my current custom build water injection I have been working on for my 2018 Mazda 3.

I machined a adapter to fit behind the throttle body to install the water injection nozzle. This system will manually, IAC temperature and AC activation controlled.

 

1.) I get it that modern gasoline engined vehicles have knock sensors (little microphones among other things - depending on make) that changes timing when knock is detected.

2.) It is well understood that the Mazda 2.5 L. turbo engines DO make more HP when fed 91 - 95 octane fuel. MAZDA officially states this.

3.) With DIRECT injection an effective cleaner like Techron and a few others DO tend to keep injectors cleaner. "Top Tier" gasoline brands like Shell, Chevron and Mobile DO add fuel system cleaners in their gas. Shell was the first to do this decades ago (at least in the US) GDI engines' injectors benefit from these additives, but, natch, not the intake valves.

4.) Oil Catch Cans (OCC) DO help reduce carbon buildup on intake valves of GDI gas engines. This is a proven fact. And with turbos it also reduces carbon buildup on the impeller.

5.) I dunno about others but when I use pure 100 octane gas in my 2019 turbo CX 5 GT Reserve I DO feel markedly improved acceleration through the RPM range. I think MAZDA made its ECU to work with very high octane gasoline. At 20,000 miles I'l pay for two dino pulls, 1st with 91 octane and 2nd with pure 100 octane. Then I'll report the results here by posting photos of the dyne slips = literally putting my money where my mouth is.

Eric B.

 

For Fu*ks sake people, you are worse than kids in the school yard.

If you don't have anything nice to say, don't say anything.

I'm sick & tired of your constant bickering.

& no, I don't want any PM with people crying that I'm unfair or going against the rules.

If you don't like it, and can't behave like adults, SOD OFF.

 

Point taken. I've PM'd Callisto regarding this. Hoping future exchanges can be friendly.

Eric B.

 

I personally can't wait to see these numbers. I will be surprised if 100 octane makes any difference. I can see two programs for 87 and 91 but as 100 octane fuel is not commonly found and would rarely be used bu owners due to cost, I can't see Mazda putting another ECU curve for it. Maybe I am wrong though. It certainly would be cool if it made a lot more power on 100 octane.

 

No one that I have read is arguing that you will get improved performance(*but not above the rated power output ) by using higher octane fuel (when required to prevent pre-ignition) because ....YES the ECU does compensate by changing fueling and timing etc.for better power developed in the engine up to. * This is commonly done on many platforms that have performance models and now very common for generally most all models in a given platform. Please don't waste you money to prove what most of all already know! Spend your money on some FUN stuff for your MAZDA!

If you really want something that will give you power figures IN THE REAL WORLD operating your MAZDA, have a look at an Autometer D-Pic. Less then a DYNO and will almost give you what you want to show for power.

 

Fixed for you, no fuel can prevent pre-ignition, period, full stop, the end. What higher AKI/Octane fuels are designed to do is prevent detonation; two very different phenomena.

 

LOL I think you knew exactly what I meant. ..... play on words....(see *MUDDY WATER) How about the need to use a higher octane when vehicle engine load are greater then the octane value to reduce engine damage caused by detonation other wise known as the RATTLE OF DEATH to some of us that build Performance Engines!
Besides both tend to overlap each other and generally can be associated with using poor quality or lowed then required for the operation octane fuels.

A good article to read?
Engine Basics: Detonation and Pre-Ignition
*
http://www.contactmagazine.com/Issue54/EngineBasics.html



D-pic in the HP set up to measure real world Horse Power. This is very accurate and if the delta is set correctly the comparing a DYNO results is very close and similar results.
2650-1055.pdf
D-Pic: Digital performance ® information center