lost track of Davies-craig controller GB -UPDATE pls ?

I've lost track of this, someone was getting a price on this, i got the pump, and am now waiting for controlller buy.

 

I'm not convinced that having the

pump not running until the water temp reaches 55C at the externally mounted temp sender is a good idea

while you are waiting for convection to occur parts of your block might see water temps at 100C ?

i don't think convection works well in our engine due to the location (height) of the inlet/outlet connections...

if people still want it, then post up here and i'll provide the information

Tom is making a controller that will prevent this bollocks

 

My D&C controller works very well.?

My temp sender is inside the heads at the hottest part of engine. I have monitored mine many times now from start up and the pump will first pulse at 35c ensuring even convection much better than OEM as the thermostat stays shut until 55c.! allowing no flow at all during this period.At first I had my doubt's this product was worth the price OR if it could lower the overall running temp significantly and it can.! Previously when hardwired my temp cycled from 86c-89c,with the thermo fan cutting in at 89c. However with the controller now set at 75c my temp sits at 73c-74c at 110km without any thermo fan required. My thermo now engages at 78c when in stop start traffic. In closing I would like to add that the controllers ability to eliminate heatsoak is an outstanding feature and that I personally am 100% happy with the product. My ONLY complaint for the unit is the large gawdy writing on the front of it.

 

i don't want to start a bitching fight

but i don't understand your maths

and this isn't the first time that you have done this to me (confused me with some statements that i don't understand)

hehe

 

i'm referring to a post on the old forums

when i expressed my concerns about locating the EWP at the outlet of the radiator, and you blasted me saying that you have located it there and you have 5 times the cooling that i have

i didn't know where the 5 came from, and how you measure your cooling

 

First show me where I blasted you.!

Second I was only trying to add real experience against an imagined experience. That is to say I actually have the complete unit installed and running very well where as you are still imagining what might happen and then passing on your misplaced thoughts onto others who may be influenced by them unfairly. You keep stating that there is no flow until 55c with the ewp which is incorrect, the oem system doesn't allow flow until 55c when your thermostat opens,but the ewp controller pulses at about 35c to ensure even convection. Personally mattz I don't care what you do to your car just please stop putting false information about a product that you obviously haven't tried. ps. you only have to look at the actual impellers on a oem waterpump to see that it is more akin to an agitator than an actual pump as opposed to the ewp which IS a pump.Max flow from oem I think is around the 10-20 litres per minute as oposed to 110 litres per minute.! No mattz I'm not looking for a bitch either.

 

Thermo fan

I just fitted a thermo fan and a 40mm twin pass radiator and im watching the temps like a hawk.

What is the regular operating temp because my thermo doesnt kick in till about 85c which apperas ok to me. My other question is that last night which was a cold night we had a bit of a fang around the place and saw temps up to 97c. I dont remember my car getting that hot on the old rad but then again I wasnt consult monitoring it then. I havent taken it for a really long run yet but I was concerned about the temps. Im not 100% sure what are ok temps anymore.

Did you fit a fan shroud to your thermo fan?

 

80c is the oem operating temp.

and yes after a bit of fang I would not be surprised at that temp(97c). I think the oem gauge doesn't move again until >95c which would indicate to me the general range. I think 85c is OK for the thermo to engage also. I would have thought the twin pass worked better but then again I don't know how hard a fang you mean't. Has your normal running temp dropped since installing the twin pass.?

 

Dont remember much of the old temps

The only time I can remember keeping an eye on the temps was for a short trip around the place pushing her a little hard to see what it got up to but it didnt hit more than 90ish but the again it wasnt long enough to compare to.

I went for a drive up the freeway today. Constant 100km/hr and she kreeped up to 95 for most of it, I dont know if my concern is just paranoia or whether somethnig isnt right. But in saying that it didnt even get to 90 till I was a considerable distance down the freeway. Went from warwick road to the end of freeway north and back, It wasnt at 90 till I got to the end and then it hit 95 on the way back.

Granted at the moment I dont have a shroud for the thermo but shroud or not at 100km/hr there is a fair bit of air going through that sucker. And either way it should still at least as good as the stock rad. Ive tripple checked the radiator fluid level and made sure everything is tight. There was a slight leak from where the thermo fans temp sensor went in but thats fixed now and hasnt had anything leak in over two days.

The normal temp doesnt appear to have risen but I can only compare this to the stock gauge because I didnt really monitor as much before. That said its never moved past half way even now. But the stock gauge is not accurate so im starting to be paranoid. I might go buy an aftermarket gauge just so I have something else in there to compare to. It looks like the previous owner had one in there so it should be easy to fit up.

Still, how hot is too hot?

 

too hot is 120 degrees as this is where coolant boils at 13psi pressure (rad cap pressure)

until the water boils its fine.. id be scared if it was tipping 95 though as thats perrty hot and your thermostat would be well open.. so it shouldnt creep up.. how olds your thermostat?? also.. under normal conditions, how hot does she get?

even after some severe right pedal action the temps shouldnt change a great deal

 

So have you removed your oem clutch/fan.?

I'm assuming since you said you didn't have a shroud makes me think you have. Therefore the next question follows if using a thermo fan on the engine side of the radiator you must turn the fan blades over and reverse the polarity of the fan also because they are set up to suck air. This would explain your running hot.

 

Isnt the rad cap 16psi?

From what I remember stock TT rad cap is 1.2bar which is approx 16psi?

Yer 95 seems too high to me. I cant remember it being more than 90 before.

The thermostat is original afaik, you thinking its borked and not opening?

Well normal conditions was driving up the freeway at constant speed and yer she got up to 95c which worried me.

 

No I dont have a shroud. I fitted the twinpass rad + thermo fan as is. I got my twinpass made with mountings for the thermo untill I get around to doing the shroud.

And yes I have removed the stock clutch fan as that was the point of the thermo.

The fan is on the engine side of the radiator, but isnt it meant to suck air through? Whats the point of blowing air through the radiator because when driving the air would be forcing through in the other direction.

I havent changed anything on the thermo, its the one from the group buy. Was I meant to alter it? When I tested it, it seemed to be flowing the correct way.

 

That's your problem

They are set up to suck air through the back(ie)(meant to be mounted on front) so when you put it on the other side you MUST reverse the blades AND the polarity.! honest I found out the hard way too. It should have said that in the instructions, but on the bright side you know what the problem is now. Goodluck with it.

 

Hmm, that seems so... simple.

Im sure when I tested it without the fan mounted to anything that it was flowing the correct way...

I will give it another go when im home tomorrow. If its as simple as that im seriously going to kick myself. Ive been so careful with everything else I have done.

Thanks for the tip.

 

You will see.

I know it sounds too simple but if you havn't done it then yes I'm pretty sure thats your problem, I'm sure you will let me know either way,goodluck

 

Will keep you informed.

At least its easy to access

 

eolectric pump etc

Hi Zorro

As I started the damn thread LOL and smiley , I'd like a little more basic info please on what you have done -

1] WHICH DC controler are you using the first DC one, or the one [supposedly] recently launched.

2] the temp sender you mention, is it totally standard in its type and location ?.
IE is your a standard sensor just relocated, or all NON-OEM, if so where and how relocated please.

3] Where have you located your pump.

4] how have you actually disconected/dispensed with the OEM water pump ?

 

and keeping to the facts,

i was under the impression that the new controller has a minimum operating setpoint of 75C. And the pump starts pulsing at 20C below the setpoint - ie 55C.

I don't know how Zorro's pump begins pulsing at 35C.

 

Would there not be a way to trick the controller..

I would assume it would be possible to trick the controller somehow to start at a lower temp. Granted it kills waranty but if it does the job and the controller works well in every other aspect.