I've Managed to find used shroud, $25 bucks..after a bit of work it fits nicely on my radiator.Next I need to get a longer spacer and install a flex blade fan.
I just finished upgrading my viscous fan on my vk, Im using a nissan patrol viscous hub redrilled to fit the water pump and a nissan SR20 plastic fan, im using a 4 cylinder shroud modified, this was all stuff I had lying around so was really cheap to do
The way this keeps my cool is unbelievable, a whole day was spent racing at the fathers day drags on Sunday 4 oct in really warm weather, I was doing pass after pass back to back, temps never went over 200F, even sitting in the staging lanes the car didnt get hot at all.
The patrol viscous hub is serviceable so you can put any thickness silicon oil in you want to adjust the drag, I filled it with 7000CST oil from the hobbie shop, using a 82 C degree thermostat, the fan starts dragging at around 95 C degrees
Im pulling the revs up to 7,000RPM limit and do consistent low 13s with my best time of a 12.8@106mph
The viscous hub does not seem to rob any power at all as with a standalone electric fan my best time was a 12.9 and I had lots of heat soak issues with the electric fan.
I only used a nissan viscous hub because they are cheap and easy to get, a holden one here in NZ are horrendously expensive or second hand ones are stuffed
food for thought?