Ted Baldwin

..........are we sure that these higher flow pumps such as the c090 and cm90 from johnson will actually help cooling. Are they more likely to harm cooling? I came across this ebay auction for a device I have no idea if it does anything. I am not recommending it, but notice that the device does 65000btu of heat transfer at 5L/min and the heat transfer rate decreases if used at a higher flow rate. The point is not about this specific device, but in general do we not want a slower pump in order to increase water to air heat transfer and improve cooling?

http://cgi.ebay.com/HEAT-EXCHANGER-S...QQcmdZViewItem


Ted

JAYCL600

+1 id be interested if anyone can shed some light on this. Thanks

Jason

chiromikey

there's definitely a point at which you decrease efficiency with too high of a flow rate. i don't know what that is but it's one of the main reasons i went with the cm30 over the cm90.

rflow306

This is a very good question, I know the flow rate depends a lot on the type of heat exchanger used. From what I can remember from thermo D the higher the flow or velocity through the heat exchanger the better the water transfers heat.
The issue becomes does the flow through the actual IC core work better at lower flow rates ? At what point do you see diminishing returns with to much flow or water velocity.

I will be installing a voltage regulator to my johnson pump and play around with the flow and see if there is a noticeable difference. With my set-up I really don't think it will make a big difference on IAT's, the actual IC core is what I need to address next at least that's what I think.

Vadim @ FD

You are correct. In the end, the core is the ultimate restriction.

chiromikey

+2

stevebez

Even with the CM90 there is no way you are getting anywhere close to its maximum rated flow over the plumbing, rads and I/C. I would say you are lucky if you get 1/4 to 1/3 of the rated maximum flow ...

So far my car running like a monster (esp at higher revs) - mainly due to the new VRTB but I guess also some due to the extra rad and CM90 pump fitted.

dsc

So what is that status on a core upgrade?

Jrocket

I agree.The IC core is just way to small,not enough surface area.But then again,Im probably the only person in here that thinks the SLR top mount coolers is'nt that magic cure.

chiromikey

i know what the magic cure is...i just don't have any money left to do it.