max water/meth ratio you've been spraying to your engine ?

[zakshaker]

Hello all,

I've been wondering what is the max water/meth ratio you guys have been able to spray before it starts to loose power

The reason i'm wondering this is cause I accidentaly sprayed much more watermeth (50:50) than I though it was set up for and has been able to gain better timing.

So I'm actualy spraying 31% of 50:50 water/meth mix and it looks I have room for more.
what would be downside of spraying even more ? Could I spray as much as I want until I reach the point it missfire ?

for reference : I use ATM an HFS-3 with a 1mm jet . Engine is 1348cc Turbo with 360cc fuel injector

[Richard L]

It would be interesting how much more watermeth you can add before it blows out the spark.

[RICE RACING]

Hello all,

I've been wondering what is the max water/meth ratio you guys have been able to spray before it starts to loose power

The reason i'm wondering this is cause I accidentaly sprayed much more watermeth (50:50) than I though it was set up for and has been able to gain better timing.

So I'm actualy spraying 31% of 50:50 water/meth mix and it looks I have room for more.
what would be downside of spraying even more ? Could I spray as much as I want until I reach the point it missfire ?

for reference : I use ATM an HFS-3 with a 1mm jet . Engine is 1348cc Turbo with 360cc fuel injector

Some zones in the engine map I have and do use up to 60% when running WM50.


My own design CDI/Coil on plug system though. On inductive much less than that.

[zakshaker]

That's a very interesting subject indeed.

I went up to 80% WM50 (standard toyota distributor with NGK iridium grade 8 plugs)
without having any missfire.

[Dust]

There is a diesel Navarra YD25 now running 22 gph 1387.98cc/m. No progressive control, just on/off boost switch

You can check out his math (link to another water meth forum)

http://www.alcohol-injection.com/forum/diesel-engines/nozzle-choice-nissan-yd25-di-2-3254.html#post17554

http://www.alcohol-injection.com/forum/diesel-engines/nozzle-choice-nissan-yd25-di-2-3254.html#post17559

http://www.alcohol-injection.com/forum/diesel-engines/nozzle-choice-nissan-yd25-di-4-3254.html

I am using 2 gph or 126 cc/m in a 650cc engine. Can't find anything about my injector size though, so I can't show the math or percentage.

[Richard L]

That's a very interesting subject indeed.

I went up to 80% WM50 (standard toyota distributor with NGK iridium grade 8 plugs)
without having any missfire.

This is very interesting. How many nozzles are you now using and the sizes? (for the 85%)

Have you changed fuel flow or ignition timng?

[zakshaker]

the reason why I was spraying 80% by mistake is cause I accidentaly had the unit working as single stage while I though it was progressive. yes I did a fuel map and changed ignition timing. From what I have been dataloging. the system performed at its best when it was injecting 60% WM50. so this is my next plan
I will try to install 3 jets now
1 pre turbo (0.4mm)
1 after IC (1mm)
1 before throttle (0.6mm)

I have posted regarding preturbo jet location : http://www.aquamist.co.uk/vbulletin/showthread.php?t=251&page=42

[Richard L]

can you do some before and after data logging?

[zakshaker]

I'm not sure I get what you mean here ?
you mean dataloging before and after changes ?

[Richard L]

I was trying to see the differen from the logged data with and without water. From there, I should be able to see how mch ignition gain and how lean you can run with water injection.

[zakshaker]

here is what I have
direct ignition difference (without compare to WI)

http://i394.photobucket.com/albums/pp24/zakshaker/D2%20RACING/purple_octane-1.gif

cell raw"P17" column"N09" is where it was 60% WM50

Since then petrol quality went down in Mauritius (it was alread bad, but it went worse 4 weeks ago) so my new map is very diferent.
I will be able to compare from single jet to 3 jets on my next mappings . the car is a TOYOTA for maintenance ATM, they will fit new jet as soon as I tell them where to fit.

I might still have datalogs maps from my previous EMS (which was an emanage ultimate), I now use a PFC

[Richard L]

Thanks for the chart, it will be great to compare when you start using pre-turbo injection.