Water Injection

[MACJXL]

Currently using 50/50 distilled water & Pure metho (not 96%) to help seal blower rotors & cool charge.
A few people have criticized me using ANY metho', & suggested methanol for better cooling.
Current settup (Starr) uses the windscreen washer bottle for the reservoir so methanol is not an option if I want to keep paint on my car :)
Anyone else played with water/metho'/methanol combos?

[Blown 454 AWD]

Not sure about the cooling side, metho against methanol however, one of our chemists said he thought water/metho was a good combo as meths has a chain simular to petrol and burns about the correct speed for my system. I have a Starr combo as well with heads & cam extra.

I find in very hot weather, 75/25 water/metho and in cold weather 50/50. Water cools better as well as denser air than most other things. I buy my metho through work in a 205 Litre for about a buck a litre. I'm about to look at 2 smaller jets, one coming in at 4 psi and other at 8 psi. I think Starry's 1 jet may be a bit big, it comes in at 5 psi from s pressure switch, earth return from the manifold.

As you would’ve already found, run out of water and she's down at least 50 kW.

[Delco]

Not sure about the cooling side, metho against methanol however, one of our chemists said he thought water/metho was a good combo as meths has a chain simular to petrol and burns about the correct speed for my system. I have a Starr combo as well with heads & cam extra.

I find in very hot weather, 75/25 water/metho and in cold weather 50/50. Water cools better as well as denser air than most other things. I buy my metho through work in a 205 Litre for about a buck a litre. I'm about to look at 2 smaller jets, one coming in at 4 psi and other at 8 psi. I think Starry's 1 jet may be a bit big, it comes in at 5 psi from s pressure switch, earth return from the manifold.

As you would’ve already found, run out of water and she's down at least 50 kW.

Your water injection on the adventura is PCM programmed to come on at 4lb in the computer - no pressure switch , you will need to add one to make another output come on at a lower boost.
The reason I make it come on at 4lb and not earlier is that in a auto car you will regualrly creep into low boost on normal driving when the water is not waranted and comsumption will increase dramatically.

Run out of water and I have programmed the engine to be safe - hence the loss of power to safeguard against detonation ( blower seal with the little water used is only very minor and not a significant part of the power loss/gain)

[Blown 454 AWD]

[QUOTE=Delco]Your water injection on the adventura is PCM programmed to come on at 4lb in the computer - no pressure switch , you will need to add one to make another output come on at a lower boost.
The reason I make it come on at 4lb and not earlier is that in a auto car you will regualrly creep into low boost on normal driving when the water is not waranted and comsumption will increase dramatically.



My Adventra definitely has a pressure switch set at 5 psi to turn the water on and has been tunned without the water injection, this way there is no problem if it runs out of water. Your’s must be different Delco.

(As an Advance Trade Cert Mechanic, I do know the difference)

I was thinking about utilising the manifold boost pressure (and not a windscreen washer pump) to pressurise the water injection system using small relief valves at 4 and 8 psi settings, they would open as boost built and was ready for that amount of water. It would certainly work.

We feel the present system may be dumping a little much water down low.

[MACJXL]

Not sure about the cooling side, metho against methanol however, one of our chemists said he thought water/metho was a good combo as meths has a chain simular to petrol and burns about the correct speed for my system. I have a Starr combo as well with heads & cam extra.

I find in very hot weather, 75/25 water/metho and in cold weather 50/50. Water cools better as well as denser air than most other things. I buy my metho through work in a 205 Litre for about a buck a litre. I'm about to look at 2 smaller jets, one coming in at 4 psi and other at 8 psi. I think Starry's 1 jet may be a bit big, it comes in at 5 psi from s pressure switch, earth return from the manifold.

As you would’ve already found, run out of water and she's down at least 50 kW.

I've never run the reservoir out so I've yet to experience the big power drop you describe.
I think I'll switch to the 75/25 mix you suggest & see how it goes.
A local (Gippland VIC) racer said he'd not use metho' at all as it is too "harsh".
I don't know what he meant by that.
Any clues?

[Delco]

[QUOTE=Delco]Your water injection on the adventura is PCM programmed to come on at 4lb in the computer - no pressure switch , you will need to add one to make another output come on at a lower boost.
The reason I make it come on at 4lb and not earlier is that in a auto car you will regualrly creep into low boost on normal driving when the water is not waranted and comsumption will increase dramatically.



My Adventra definitely has a pressure switch set at 5 psi to turn the water on and has been tunned without the water injection, this way there is no problem if it runs out of water. Your’s must be different Delco.

(As an Advance Trade Cert Mechanic, I do know the difference)

I was thinking about utilising the manifold boost pressure (and not a windscreen washer pump) to pressurise the water injection system using small relief valves at 4 and 8 psi settings, they would open as boost built and was ready for that amount of water. It would certainly work.

We feel the present system may be dumping a little much water down low.


Sounds like someone may have changed it since I did the original tuning on it , it was originally setup with a PCM controlled water injection when I tuned it at STARR

[F6Mauz]

Will running methanol in the injection make it lose power if it's not tuned to make the most of it? How much of a difference does it make compared to running straight water?