Astra Coupe Turbo 273bhp, but 25bhp less power with WI.

[Richard L]

Originally Posted by K3FUS

Sounds like a stupid question, but what will it do? My car is identical to Mike's and as you may remeber my WI is non operational at the moment until I deside what to do with it (still not sure about the intercooler spray).

The unit is suppose to modify the fuel delivery. In order for WI injection to play an active part in power making, the air/fuel ratio has to be corrected.

In almost all turbo cars, it tends to run rich to so the fuel is used as a coolant. But rich a/f ratio also robs power. So if we can replace those extra fuel by water, it is the most ideal setup for water injection. The unit do just that.

Water injection is effective on retaining your power in the summer by keeping the charge temperarture down but in winter, it tends to rob power due to over cooling. Reducing rich fuel mixture will allow more heat available for power.

Does it make sense?

Richard

[K3FUS]

What you are saying makes sence, but I'd like to see it thoughly tested beforeusing it on my car as I'm sur eyou know the consequences of running the car too lean at high boost.

[Richard L]

Originally Posted by K3FUS

What you are saying makes sence, but I'd like to see it thoughly tested beforeusing it on my car as I'm sur eyou know the consequences of running the car too lean at high boost.

I won't be taking any unnecessary risks - will porbably calibrate it on a dyno rather on road.

After all, this what WI is originally designed for - replacing excess fuel. The above unit is quite safe, it reads the lambda and if it go lean, the voltage converter will switch off automatically.

If the unit proved to be effective, might fit a DDS3 to monitor water flow. The unit is also capable of modifying the fuel in relationship with water flow adn well as monitoring the lambda at the same time.... This will be almost be 99% bullet proof. The unit is not expensibe to produce either.

Richard

[Richard L]

Here is a chart shows how the little unit work:

[ashtal]

What connections will the maf converter need to the car ?

[Richard L]

Originally Posted by ashtal

What connections will the maf converter need to the car ?

There is a multicore cable that goes to the MAF sensor on the Astra:
1) 0V
2) +5V
3) +12V
4) MAF OUTPUT (0-5V)

The converter splice ionto the cut MAF cable. We also use the +12V and 0V for powering the converter.

Quite simple.

Richard

[ashtal]

Originally Posted by Richard L

There is a multicore cable that goes to the MAF sensor on the Astra:
1) 0V
2) +5V
3) +12V
4) MAF OUTPUT (0-5V)

The converter splice ionto the cut MAF cable. We also use the +12V and 0V for powering the converter.

Quite simple.

Richard

Will it need connecting to the 1s kit and the dds3 ?

[Richard L]

I have made provison on the prototype to sense the pressure switch of the 1s, when the 1s triggers, it will automatically start the conversion.

I have also made available an extra input to read the DDS3's flow signal (50-450cc/min) so the converter trims the fuel proportiional to water flow.

All these facilities are waiting to be tested. I am still a bit tied up at present. The unit has already been made sometime ago but yet to find time to try it. It all work as intended on the beanch.

Richard

[Gelf]

Originally Posted by Richard L

I have made provison on the prototype to sense the pressure switch of the 1s, when the 1s triggers, it will automatically start the conversion.

I have also made available an extra input to read the DDS3's flow signal (50-450cc/min) so the converter trims the fuel proportiional to water flow.

All these facilities are waiting to be tested. I am still a bit tied up at present. The unit has already been made sometime ago but yet to find time to try it. It all work as intended on the beanch.

Richard

Looks like Ive been missing out on some interesting developments

[MikeWarner]

Sorry Richard - I haven't been able to get those figures to you as my car has been of the road with a major electrical fault. Maybe you can help with your knowledge of electrics? See this post for more info:
http://www.migweb.co.uk/forums/showthread.php?t=244956