hey guys i have a simple question, can anyone running 454 with carbs tell me at approx. how many rpm's do all 4 barrels kick in i have heard differnt numbers on the gallons per hour but i know someone here should know so i can stay under that. i just refueled at almost $5.00 mid grade OUCH!!! thanx Pete
I have lways heard 3200 I am thinking it probably differs a little with each engine carb type etc. My manual form bertram shows that 3000 is the optimal fuel usage speed.
I have lways heard 3200 I am thinking it probably differs a little with each engine carb type etc. My manual form bertram shows that 3000 is the optimal fuel usage speed.
Good Morning Guys: This is great info for my boat, as I am trying to max cruise knots while keeping the secondaries from dumping fuel. I am installing fuel manager from Lowrance to aid in this project and your answers are just what I was looking for to start. Thanks again for the info. Capt LuLu
When I had 454's I used to cruise at 18-19 knots @ 3200rpms. Floscan showed 30-32 gph at that speed. Personally I think that 18-19 knots is the best compromise for the 454's. The boat gives a much better ride at that speed than at 16-17 knots (i.e. bow comes down more and wake starts to get nice and flat).
Regards, Doug L.
1986 33 Bertram FBC Cummins 6BTA's Queen Elizabeth
Marblehead, MA
