I believe a 4.6 could make it up to 7,500 but are you sure it's even possible to spin a 5.4 that fast. Might be wise to do your home work on just how much faster the pistons have to go up/down to reach that RPM.
I believe a 4.6 could make it up to 7,500 but are you sure it's even possible to spin a 5.4 that fast. Might be wise to do your home work on just how much faster the pistons have to go up/down to reach that RPM.
I took the whole block apart I have a cobra jet crank aftermarket rotating assembly and 2v ported pi heads sorry I wasn't fully descriptive in the question. They have 4.6 spinning 10k a 5.4 spinning 8k shouldn't really be a problem after a good bottom end build