Electric fan install help.

goldduster318 said
You just need the sender like the link. You have the choice of any of the brand senders listed in the list. If you don't feel comfortable about the custom cal, just use an autometer or dakota digital sender.

http://www.amazon.com/gp/product/B00902FVNU/?tag=joeychgo-20

I am actually using that one. My junkyard one actually had a bad one in it and I got the ebay seller to knock the price of a new one off the part. So far so good.

Once again, having read your post, your shroud was blocking about half your radiator from any free flow...and the fans champion sells are cheap junk. If going back to the "standard stuff" doesn't work...then what?

Pretty much every overheating thread with champion radiators is because someone either chose the wrong one or used their crummy fans/shroud combo. Use good stuff within the design...works fine. Once again, you said nothing relating to a contour fan.

I see your points and 4 weeks ago I would have agreed with you.
However today I pulled the fans and tried some very expensive ones that a friend has on his supercharged hemi car,
They made no difference at all, so we cut the shroud off and extended it a bit so we had more air flow. No difference at all.... Played again with timing, Thermostats, no vac leaks, still no change for the better. So I'm waiting for a friend to drop around another radiator and fan combo that I can try and see if this will work.. Unfortunately there is not much room in an a body running a 440 so I can't extend the shroud any further.
I've sourced a stock water pump and fan, just waiting for it to arrive.

Tomorrow I am going to cut the top and bottom tanks off and make a dual or triple bypass.
Will see how that goes.
I'm persisting with the alloy rad because original or reproduction a body big block radiators are stupidly expensive by the time I can land one here and original ones are rare as, well you know.

Anyway, hope you guys have better luck than me.