[T2] water injection

[c.dreike]

Robert,
I have read through your treatise on water injection and it seems that I 
misunderstood where the injection should take place. I have connected to 
a port on the throttle body which is below the butterfly.
Back to the drawing board.

Regards.
Chris
64DD Kamper Kit


On 10/29/2016 3:45 PM, Robert Mann wrote:
> My article 
> <http://www.kuratrading.com/HTMLArticles/writings.htm> mentions the 
> sizes of needle which, on different carbs, give a suitable feed-rate 
> of water / i.e./  approx 5% of the fuel consumption.
>       Quote:
>                     Often best is 0.71mm (22G) or 0.63mm (23G), but 
> 0.8mm (21G) or 0.51mm (25G) is best for some motors.
>
>      If I convert 0.012" correctly, it comes to 0.3mm which is if 
> anything too small.  I can't think where there would be a strong 
> enough vacuum to suck thru that tiny restriction such a huge flow as 
> you record.  I suspect one of us (?both) has made a numerical error.  
> Let us both check  ...
>      My 1600dp has the Brazilian Weber (30mm choke).  The rubber 
> joiner  push-fit onto the nozzle which provides the vacuum to the 
> distributor has a 0.61mm needle stabbed in from the high side.  The 
> rear L of the body provides a good spot for c. 3L of water.  If like 
> me you are in a jurisdiction requiring official safey inspections 
> regularly, you may be required to slap a floor into that water 
> compartment; if so, perspex is best.
>      Sorry to hear your oxygen sensor was crippled.  May it recover 
> upon some more use?  BTW AFAIK the use of that component was invented 
> by my sometime U of Auckland colleague Dr Geo Blanshard, who reasoned 
> it was all very well to inject what is computed from the airflow, the 
> accelerator position, etc, but if you fail to check what then actually 
> results from combustion you are in a sense working in the dark.  I 
> recall the sensor he slapped into the exhaust cost (c.1981) $200.  If 
> yours does not recover from its chilling experience, I trust the 
> replacement will by today be much cheaper.
>
> Keep in touch
>
> Robt Mann
> 1973 1600dp Devon
>
> On Sun, Oct 30, 2016 at 4:55 AM, c.dreike <c.dreike at verizon.net 
> <mailto:c.dreike at verizon.net>> wrote:
>
>     Robert,
>     I finally tried some water injection on my FI upright engine using
>     your ideas. I need a smaller orifice to meter the water. I used
>     one around .012". Sucked water like mad. About a pint in few
>     minutes. Had to keep the engine reved up to prevent stalling. 
>     Ruined my wide band O2 sensor. I suppose a smaller amount of H2O
>     would not do the damage. What size needle did you use in your
>     water injection exeriments?
>
>     Regards,
>     Chris
>     64DD Kamper Kit
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