chuckpp

Does anyone have torque specs for 575sci Mains rods heads etc?

tks

Young Performance

110 ft lbs on the mains
30, 50, 65, 75 ft lbs on the heads
Which rods do you have....Gm or H beams? They can with both.

chuckpp

H beams..tks I think they are 80-85 with 30 wt oil or .005 to .0054 stretch but just making sure..

tks

Young Performance

I would call ARP on the rod bolts. You will need the type of bolt (8740 or 2000) and the under head length. I don't think that Mercury gives the stretch, only the torque. The lube that you use will greatly affect the amount of torque needed. That is the reason to use the stretch method....it takes torque and lube out of the equation. ARP recommends using their ARP lube. That is what we use.
Eddie