to pump and/or divorce OR NOT ? ( HE option)

[waxxonMTL]

So I got the reservoir and the heat exchanger, thinking about the getting the pump JABSCO ( on amazon for 250$) apparantely its the same as the APR use and I could also divorce the system.

What,s everyone though about that ? is the pump needed ? I looked at AWE different graph, but seems like the pump can lower temp by not so much compared to a reservoir or a HE.

[RLB6]

So I got the reservoir and the heat exchanger, thinking about the getting the pump JABSCO ( on amazon for 250$) apparantely its the same as the APR use and I could also divorce the system.

What,s everyone though about that ? is the pump needed ? I looked at AWE different graph, but seems like the pump can lower temp by not so much compared to a reservoir or a HE.

HE and additional reservoir is all you'll most likely need. That pairing gives you the most significant improvement over stock. Adding a supplement pump is only icing on the cake.

[Loe]

To be honest, since you are considering a pump upgrade, you might as well re-wire the OEM pump to trigger on at all times first, and then upgrade the pump later if the OEM unit fails.

As for divorcing, based on my past experience, I personally think the de-pressurizing effect of it is beneficial in terms of leakage that may result in hydro-locking the engine on our fragile s/c intercoolers (the ones mounted on both sides of the s/c rotors). Many will say you loose the "benefit" of using the OEM safeguards to tell you when the coolant is running low. However, the amount of coolant I lost (and it was a lot) in the S/C loop was not enough to trigger a low coolant level light, which makes me wonder how much coolant you truly need to lose in that portion of the loop before the light does come on on the dashboard. Just some food for thought...

[waxxonMTL]

thanks for the input ! I will look into it, i guess i should do some more research tho.

[whiped]

I ordered the same thing(HE and Res) and plan on divorcing the system. (I intentionally did not order the pump as I did not think it was worth it)

If I start tracking my car more I was going to add a switch to the pump to make it run at 100% when the switch is active.

[waxxonMTL]

http://www.audizine.com/forum/showth...1#post11675126

based on this testing, I guess for 350$cnd it just make sens to get the pump while your there anyways.. ( i mean if you decide to get it done later, you might end up paying another 1-2 labour $$ so it pay off almost instantely lol)

Can anyone else confirm the JABESCO pump is the same as the APR/AWE ?

http://www.go2marine.com/product/549...40-series.html

[Jflow23]

To be honest, since you are considering a pump upgrade, you might as well re-wire the OEM pump to trigger on at all times first, and then upgrade the pump later if the OEM unit fails.

Loe, have you done this? If so, do you have pics of what you did with the wiring?

[Loe]

Loe, have you done this? If so, do you have pics of what you did with the wiring?

I have not, however if I could start over, its the route I would have taken first as the OEM pump flows well when the ECU triggers it to do so.

[waxxonMTL]

I have not, however if I could start over, its the route I would have taken first as the OEM pump flows well when the ECU triggers it to do so.

theres still a drop of approx. 6 farenheint compiled from the awe's chart ? like 24 farenheit for reservoir and HE and then an additional 6 for the pump.

[xpoweruk]

I had my front bumper off today to sort a join on my custom cooler.

1 thig I did notice was my OE pump was working from about 60-120 seconds.

[14S4GWM]

I have not, however if I could start over, its the route I would have taken first as the OEM pump flows well when the ECU triggers it to do so.

Is there a way in vcds to lower the temp for it to turn on?

[xpoweruk]

Is there a way in vcds to lower the temp for it to turn on?

Not that I have seen.
If we can find out the wire that has the PWM signal we will be on target,
If we get the PWM we can control the pump as & when we need it :)

[Hofahome]

The jabsco works great. I had to cut off the mounting bracket to get it to fit in the old pump location. And just go to your hardware store to get the pieces to connect the pump to tubing, instead of buying them for $30 each from jabsco.

[Jflow23]

I divorced today...


Weapon R Honda Ruckus coolant overflow tank

They set me up...didn't realize the upper nipple was there after looking at the ad.



Liars...




Capped engine system.

Once I saw the nipple, elected to install in a totally reversible route...no cutting or drilling of any stock parts. Not as elegant as I would have hoped.

However, perhaps the simplicity of this mod will inspire someone to start stamping out tanks and brackets for less than $180 in a more professional looking kit.

Hofahome DIY S/C coolant system going in soon. I have the tank, building the patience to start the install. Still recovering from the 194mm crank pulley install and subsequent belt drama.

[Hofahome]

Nice man! I recommend building the bracket for the new HE before starting on the full project. As in, make it the night before. That way you can just bolt it up and start routing hoses. And make sure to check for kinks and places the hoses might rub on metal. PM if you need help. I'll probably need info in future from you for adding the 194 pulley.

[BG SQ5]

I have not, however if I could start over, its the route I would have taken first as the OEM pump flows well when the ECU triggers it to do so.

Does the pump turn on/off or run at different rates depending on the conditions? Is there a way to log what the pump is doing in VCDS? Sorry, I haven't gotten too deep into my research of the cooling system yet. Would be nice to figure out what exactly Audi is referring to as 'improved cooling' with the SQ5...and if all these great DIY setups and mods you guys are doing can be carried over for us too!

[cspcrx]

According to an Audi Tech and APR it runs at different percentages based on pressure and tempt. I believe APR changes this to cause it to run more, if I understood what Sean said.

Learned a bit about the system after my tune and the tuner thought the pump was not working.

[cjw]

How much does divorcing the system alter the cooling with the OEM heat exchanger? The graphs I've seen were with an exchanger, then divorced with an exchanger.

[Jflow23]

Hofa, thanks for the tip...I was thinking that too. I'm going to paint them as well.

CJW, APR's chart claims 4-5 degrees C...or ~8-10F.

[Loe]

theres still a drop of approx. 6 farenheint compiled from the awe's chart ? like 24 farenheit for reservoir and HE and then an additional 6 for the pump.

You have to also remember that the OEM unit is PWM-based unit and doesn't trigger 100% under all conditions like the upgraded pumps too. The aftermarket pumps definitely flow better though, however I do wonder if half of that drop is due to the pump operating constantly?

[Hofahome]

You have to also remember that the OEM unit is PWM-based unit and doesn't trigger 100% under all conditions like the upgraded pumps too. The aftermarket pumps definitely flow better though, however I do wonder if half of that drop is due to the pump operating constantly?

Ya probably true. I didn't see a HUGE increase in flow (although it is noticeable) between the stock vs jabsco. I didn't even plan on upgrading the pump. The question, however, is how long can the stock unit last going full time?

[waxxonMTL]

Ya probably true. I didn't see a HUGE increase in flow (although it is noticeable) between the stock vs jabsco. I didn't even plan on upgrading the pump. The question, however, is how long can the stock unit last going full time?

exactly, i would expect the stock pump might not be up the task to run 100% of the time.

However, just to make sure, if you upgrade the pump, will it run 100% of the time ?

[RLB6]

exactly, i would expect the stock pump might not be up the task to run 100% of the time.

As Loe stated, the stock pump is only enabled when needed so it is not running 100% of the time. So, using an much more efficient heat exchanger and an additional gallon of coolant, thanks to the added reservoir, the stock pump would need to engage less often vs having the stock heat exchanger. This would lead me to believe that the stock pump would more than up to the task with the added benefit of an extended life.

[cjw]

It would be useful for a tuner to chime in as well since I believe they claim they modify the pump parameters. If they could explain/elaborate, it might end up being mostly a waste to go 100% all the time.