Wiring up intercooler pump

[anonymous.shyster]

Hi,

I'm wondering if I can have the MicroSquirt control when the water-to-air intercooler pump and fan operate. I don't see much need in having the pump circulating water when I am at idle, or cruising with no boost. Can the MicroSquirt control (via TPS/Alpha-N, hopefully as I don't intend on running a MAP sensor if I can get away without it [only using uS for spark, not fuel injection]) when the pump and fan come on and go off?

I was thinking of something along the lines of, if I'm at > 1/3 throttle, the pump and fan are on and stay on for at least a minute. Perhaps this would require a latching relay? How would I go about this?

[Matt Cramer]

You can use the spare output settings to trigger relays from the ALED and WLED outputs.

[anonymous.shyster]

Does anyone know where I might find a timer (latching) relay? I've tried Jaycar, RS and Farnell but haven't found what I'm after, closest match was one on eBay.

[R100RT]

Try an internet search for "Releco" or "Omron", both have what your looking for - would just need to narrow to a distributor in your location.
However, if you are seeking to keep a relay on for a minute as you've indicated, perhaps you're better with a programable timer relay ( for example, Omrom "H3YN-2" ) which can be set for anything from parts of a second to 10 minutes max with dip switches for either "time on" or "time off" etc.)

[anonymous.shyster]

How do I go about setting the paramets to use the ALED and WLED options? I'm using Megatunix to set things up and I don't understand the options or how I would go about telling it to send a signal when the TPS reading is above half throttle.

Note: I have a latching relay which is set to one minute. So once the latching relay receives a signal, the intercooler pump should pump for one minute from when it receives the last signal.

[Matt Cramer]

This link covers spare output settings, although you don't need the hardware mods it describes.

http://www.megamanual.com/ms2/spare.htm