Right, I know this might cause controversy as I'm actually looking at something a little different to the norm but here goes anyway.
I know I am not the first person or indeed the last person to think, plan or do a water injectrion system but I quite fancy it!
I've been thinking about combining my S2's inlet and some water for some time now. I've had a look over previous threads about IC sprays, read articles and had a think about it myself. I've also been quite shocked by the sheer cost of the Aquamist system! Further research has indicated that most of the cost of the system is the pump and whilst I've read the sales patter on the website, I can't see that such an expensive item is really required. Any pump that can handle the substance, flow rate and pressures required must be suitable.
As I see it there are 2 options when it comes to using water:-
The first is quite a simple job and can use the headlight washer pump and either some proprietary holed tubing or a number of nozzles to operate effectively. I will leave this for the moment as it is a day's work and about £50 to get working effectively with a boost switch and override switch to pre-empt boost, i.e. overtaking or WOT.
The second option is what I would really like to achieve but rather than shelling out £300+ for the Aquamist sytem, I would like to achieve it for a more moderate sum of money. Some research on the internet has identified 4 similar kits from the states that use a different, cheaper, pump desingn and start at $200.
http://www.alcohol-injection.com
All seem to offer very similar products for the same price.
Another option is to use a fuel pump or proprietary pump with nozzles, check valves etc. sourced from various sources to create my own system. This is not my favoured choice but I may be able to identify redundancy in any kit I buy and save money in the future. Fuel pumps acn be used but they don't last long so this might not be an option!
From my research, it would appear that a volume of water equal to 10-15% of the fuel being added is the correct amount and that up to a 50% mix of methanol would increase octane, although I am unsure of the legalities of using this over here. The changie in fuel addition across the rev range would imply that a sequential or varable pressure system woul dbe favourable but careful choice of pressure and nozzle might enable a compromised system to work well.
As far as I see it, providing the water is supplied at the correct time and rate, this is a winner. I will be looking into this over the next few weeks to try and identify my requirements on a 250-300bhp.
Current I am after water injection above 0.6bar (to keep injecting to the red line) and I might look into expanding this to a sequential system (for the reasons above) at a later date if it proves successful and is worth further investment.
I know I am not the first person or indeed the last person to think, plan or do a water injectrion system but I quite fancy it!
I've been thinking about combining my S2's inlet and some water for some time now. I've had a look over previous threads about IC sprays, read articles and had a think about it myself. I've also been quite shocked by the sheer cost of the Aquamist system! Further research has indicated that most of the cost of the system is the pump and whilst I've read the sales patter on the website, I can't see that such an expensive item is really required. Any pump that can handle the substance, flow rate and pressures required must be suitable.
As I see it there are 2 options when it comes to using water:-
- Spray the IC to improve the heat transfer in the IC
- Spray water into the charge to reduce charge temp and combustion & EGT temps.
The first is quite a simple job and can use the headlight washer pump and either some proprietary holed tubing or a number of nozzles to operate effectively. I will leave this for the moment as it is a day's work and about £50 to get working effectively with a boost switch and override switch to pre-empt boost, i.e. overtaking or WOT.
The second option is what I would really like to achieve but rather than shelling out £300+ for the Aquamist sytem, I would like to achieve it for a more moderate sum of money. Some research on the internet has identified 4 similar kits from the states that use a different, cheaper, pump desingn and start at $200.
http://www.alcohol-injection.com
All seem to offer very similar products for the same price.
Another option is to use a fuel pump or proprietary pump with nozzles, check valves etc. sourced from various sources to create my own system. This is not my favoured choice but I may be able to identify redundancy in any kit I buy and save money in the future. Fuel pumps acn be used but they don't last long so this might not be an option!
From my research, it would appear that a volume of water equal to 10-15% of the fuel being added is the correct amount and that up to a 50% mix of methanol would increase octane, although I am unsure of the legalities of using this over here. The changie in fuel addition across the rev range would imply that a sequential or varable pressure system woul dbe favourable but careful choice of pressure and nozzle might enable a compromised system to work well.
As far as I see it, providing the water is supplied at the correct time and rate, this is a winner. I will be looking into this over the next few weeks to try and identify my requirements on a 250-300bhp.
Current I am after water injection above 0.6bar (to keep injecting to the red line) and I might look into expanding this to a sequential system (for the reasons above) at a later date if it proves successful and is worth further investment.
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