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Help with building your Speeduino, installing it, getting it to run etc.
By kettlekev
#46766
I agree but I am REALLY stuck for space. I have an additional controller right now but it isnt small.

I am shrink down the speeduino housing as it is to get it to fit somewhere and it would be really nice to have my CLT sensor control few things.......
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By PSIG
#46779
Water should flow at some rate all the time, if only to move engine coolant past the sensors when cold. But if there is no mechanical or electronic thermostat for coolant flow control, the electric water pump may be used for flow control. Yes, 100% constant flow can sometimes work (using fan-only for limited temperature control), but bikes (I think this is for one) have small electrical systems, and electrical load reduction is also fairly important when combined with fuel pump(s), ignitions, lights, fans, etc.

Anyway, I'd see if the Boost Control TPS input can be switched in code for CLT (I don't know), or VVT (non-PID), or perhaps make a little Nano pump control sketch and glue it in your Speeduino case. That assumes your pump is small enough to use with a typical board (about 8A max depending on board trace size and flyback control), or you're going to an external driver anyway.

I'm following this, as there are many interested in using an existing PID output for other stuff like PWM fuel pump pressure control with a fuel pressure sensor, PWM Fan control, etc. It would be great if Boost Control or other feature could have alternative inputs for alternative uses. ;)
By LPG2CV
#46781
@PSIG David, I was wondering if Peak and Hold may have it place with engines with small amperage setups. perhaps useful for holding a relay open (if necessary) and the water pump itself.
By kettlekev
#46848
Thanks guys.

Yes, flow control is what I need as I have no thermostat and as you mention, current is an issue.

I have an Arduino based computer for everything else on the bike so could actually use an OP from that to drive the pump but would then need to split the CLT sensor input or get the temp across serially or something (although my serial ports are all being used I think).

Good start though and maybe better than messing with boost code.
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