Heh. I now found out this thing actually HAS configuration file.... It is hidden however
SERVER\BUILDCRAFT\CONFIG\AdditionalPipes.CFG
MODIFY
powerloss=0.995
0 = 100% loss per block (HC Mode )
0.5 = 50% loss per block
1 = NO loss per block (Great one worked for me)
0.995 = Default - 0,5% loss? per block.