Is this a fair radiator?

Your picture shows no shroud, BIG no-no, and your looped together heat hose is returning hot water right back into the block. You basically need more airflow through the radiator, and fix some of the "hacking" there


If you can get the fan close enough to the radiator you don’t need the shroud, and the shroud VN be an issue at higher road speeds.

The OP needs to get the water pump (and the fan) turning faster than the crank and then go from there.