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......continued from http://dggt6.blogspot.com.au/


dggt6

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well it's been so long since I updated my  http://dggt6.blogspot.com.au/  , I can't get back into it.
So now I have something to write and show, I thought I would host it here amongst the many friends who have tried to keep me sane.

A major reason for megasquirting my car was because of the "measuring" that can be done. I ordered my MS2 with an extra coolant sensor because I wanted to measure the coolant temp coming out of the engine as well as the temp coming out of the radiator/going into the engine. This would prove crucial as I changed the cooling system to incorporate a large bypass hose and a remote thermostat that would mix cold radiator water with hot engine water. With 2 sensors I could compare different set ups and have accurate information on which system worked better.

Moving on, I realised that I would like to know how hot the water was at the back of the engine, but alas you can't add any more sensors to the MS2. However, you can buy another extension board where amongst other features, you can add 8 extra sensors!
Jean in Canada makes and supplies these boards and gives great service to help set it up, and again, I needed LOTS of help. http://jbperf.com/io_extender/tinyIOx.html
The TINYIOx provides

  • 9 ADCs
  • 6 timer channels
  • CAN
  • 1 RS-232 port
  • 1 I2C bus
  • 2 spare digital I/Os

The RS-232 is connected to a 2.5mm jack for connecting to an LC1 chain. The TinyIOx communicates with an MS2 or MS3 through the CAN port.

I decided to only use the ADCs to provide 4 temperature and 4 pressure sensors. This required 2 different additional circuits to be wired up between the TinyIOx and the MS2.

I intend to use the 4 pressure sensors to measure the oil pressure at the front and rear of the 2500 engine as well as the fuel pressure and maybe the water pressure, just because I can!
I have been having fun with the 4 temp sensors placing 1 behind the grille for a benchmark, 1 on the brake master cylinder , 1 on my fuel pump in the engine bay and 1 on the outside of the louvers on the top of the bonnet. I can now compare these 4 temperatures at once along with the "original" manifold air temp sensor. So far I have taken these measurements with 3 variations of radiator "shrouds".  I will post some graphs of the different temperatures soon.

Cheers for now,
Doug

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