HELP. Desperation, last resort before scrapping Project 16v.

[Dave]

Go back to basics, try get a basic flow measurement through the rad. Get a second measurement on the temps too.
If there is no flow through the rad then work backwards.
Remove stat and force flow through rad. If there is no pressure then its a pump issue. If there is flow going through block and through the rad as OEM specs, then your engine must be putting out the heat, or your rad inst radiating heat (airflow clear?) - at the moment the details from the thread are hazy to whats defo been tested/hasnt.

If you know for sure the rad is transferring all this heat and still its overheating, check a correlation with your inlet/exhaust temps and EMP. When does it seem to overheat, what kind of driving, consistent? or hammering? how long to cool down, how long to heat up, need more details on how/when it occurs really if it is the block kicking out all this heat.

There is a crew on this forum who are definitely eager to help you sort this issue out.