[T2] water injection

[c.dreike]

At the risk of sounding like a Valley Girl,
Yeah, Totally,

Chris


On 10/29/2016 8:15 PM, Robert Mann wrote:
> You are totally digitized?!
> I have far less experience with non-carb'd engines.  The few FI 
> engines I've slapped water into, I've put a much bigger needle than 
> those mentioned earlier into the narrowest place in the induction 
> tract after the air cleaner.  At least one, in some examples 2 needles 
>  –  the stainless ones typically used to take a pint of blood from a 
> donor.
>
> cheers
>
> R
>
> On Sun, Oct 30, 2016 at 3:57 PM, c.dreike <c.dreike at verizon.net 
> <mailto:c.dreike at verizon.net>> wrote:
>
>     One more point is that I have no dizzy, as the FI system performs
>     the spark generation by way of a coil pack as in modern FI
>     engines. I have full control of the advance function and air/fuel
>     ratio via data arrays.
>
>     Chris
>
>     On 10/29/2016 6:52 PM, Robert Mann wrote:
>>     What carb do you have?
>>     The best place to slap in the water is, as I theorise, just
>>     outside the throttle butterfly. This is where a small hole takes
>>     vacuum (via a nozzle at no predictable place on the carb body)
>>     for the dizzie.
>>     Actually it doesn't matter as much in practice on our engines,
>>     because they are wide open nearly all the time.
>>
>>     Keep in touch
>>
>>     R
>>
>>     On Sun, Oct 30, 2016 at 2:08 PM, c.dreike <c.dreike at verizon.net
>>     <mailto:c.dreike at verizon.net>> wrote:
>>
>>         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
>>>         <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
>>>             _______________________________________________
>>>             type2 mailing list
>>>             type2 at type2.com <mailto:type2 at type2.com>
>>>             https://www.type2.com/lists/type2/listinfo
>>>             <https://www.type2.com/lists/type2/listinfo>
>>>
>>>
>>
>>
>
>