The fuel lines on my 454's are 3/8" I.D. which it had from the factory. I replaced all of them with the exact same aeroquip hose when I bought the boat and that worked fine. The 8.1 install manual specifies 1/2" I.D. which raises a few points:
1) The fuel pump cooler/inlet is 3/8" so that limits my flow at the pump regardless of what I do
2) If anything, I think the 8.1's will require a little less fuel than the 454's
I really won't know the NEW fuel line layout until I get the engine installed but I'll likley need to make up new lines regardless. Should I just stick with 3/8" or bump up to 1/2"?
thanks
Bob
1) The fuel pump cooler/inlet is 3/8" so that limits my flow at the pump regardless of what I do
2) If anything, I think the 8.1's will require a little less fuel than the 454's
I really won't know the NEW fuel line layout until I get the engine installed but I'll likley need to make up new lines regardless. Should I just stick with 3/8" or bump up to 1/2"?
thanks
Bob