Any thoughts on which one I should use to ground my new electric water pump? I was thinking maybe egr?

Merry X-mas and thanks for any help.

 

this would of course be controlled VIA a relay ? if not i think youd be asking for trouble. en ECM output couldnt possiably drive the water pumps enormous needs for current.

Id suggest one of the fan outputs myself to a relay then set the pump to turn on in the prom at -34c VIA fan 2 or something similar

 

I'd go with something more complicated then that.

For openers, use a DPST, switch and have a high and low speed, that way you can use low for engine warm-up, and then high for run.

Then long term work out a PWM setup so that you only use as much of the pump as you need rather then run it WOT all the time. It'd have to last alot longer.

Maybe something as easy as using the injector PW to run a big MOSFET, would work. No injector, no fan, low PW like at idle would be low speed on the pump, etc. etc. Maybe a PIC to convert the PW to be a controller for the fan.......

 

Yeah I plan to use a relay, Which is fan 2 output?
Actually I plan to turn it on about 73c being that it will act as the thermostat .
I am also going to have a manual switch for the track cooldown and set prom as a back up around 180 f degrees or - 87c.

Thanks for help, time to go do the family thing.



Grumpy the high and low sounds like a great idea, As far as the variable speed goes that to is a great idea. But I think these pumps last around 2500 hrs which I figure to be well over 30,000
miles.
Its a proform pump, they are pretty cool for only $140.

 

Considering how poor of longevety electric waterpumps have (Im not letting it stop me), do you think cycling it or partially loading it through a hi/lo setup would further shorten its lifespan?

 

i dunno I think playing with pump speed could invite some serious headaches. id just set it up to run from the fuel pump relay. thats what i normally do on lt1 cars. when the fuel pump comes on the water pump comes on to. just feed the switch wire from the fuel pump to the relay for the water pump. it works fine for me. just make sure to use a thermostat.

 

I don't plan to use a thermostat, There is no need when you have a pump that does not need to run. especially laboring against a thermostat.
Also during race season it will be used to cool car between rounds, a thermostat will keep that from happening.
Does anyone know which pin fan 2 is?

 

Nevermind, Just searched .
For anyone reading this who wanted to know, pin F8 will ground when fan (2) temp is reached. allowing you to use that as a coolant temp. operated ground for what ever you may need it for.

 

I was thinking about stuff like this when I was cleaning up my harness. There is the egr,ccp and about 5 other inputs/outputs that are not being used. Some function differently giving the ability to run many types of devices. Just change the table(s) to turn on/off your device as needed. I would think that everyone uses relays.....

 

Actually I may repin the EGR wire from (GE 9) TO SLOT (F 8) so I do not need to run another wire, And I can make a handy connector .

 

that is what I did when I did the SD swap. I didn't run any new wires I just found some existing ones already ran(unused) in the harness...