Down to 165/145L/H now

Adding more pumps has a really big diminishing returns. Look at Stephen from Swiftechs little (for fun) test. going from 3 to 5 pumps gained nothing.
http://www.swiftech.com/stephens-corner.aspx#tab3
I dont think you will gain much at all going from 2 to 3 pumps in your really restrictive loop.

I would look to try and reduce restriction instead. Going from serial to paralell gfx again, reducing 45s to a minimum and so on...
I know, 45s doesnt have that much restriction, but they do have some, and with the amount you have it will add up.
http://www.xtremesystems.org/forums/...d.php?t=266003

Im not saying that your loop is restrictive just because of the 45/90s, i dont. If i should take i guess, i believe its the mosfet and nb block thats the biggest sinners.

I just think its un-neccesary to use alot of them 45s when the tubing can do the job just fine