If you went block->res->rad->pump->block... and used 3/4" tubing and fittings between the pump and the rad, 1/2" everywhere else, I think you would get the best results. BillA and others have been mentioning quite bit lately the benefits of having as big an inlet on your pump as possible.
edit: your 1/2"ID tubing will fit over the 5/8" fitting on your rad if you soak it in hot water a few minutes before trying it. Hmm, now that I think about it, if you had 5/8" fittings and tubing between your res->rad it should help a bit more.
peace.
unloaded
|