Fuel delivery options
 

Assuming you were not using a water pump mounted mechanical fuel pump for gen 5 509's naturals over 500 hp what would be a good choice. I'm curious what kind of input I will see here. Starting from scratch. We don't any pumps, regs or hose ordered yet. Just pick ups and a place for a return if we chose. Boat will see severe duty.

I'd run an Aeromotive A1000 with a return to the tank.

I tell ya my opinion but you will get many!! I love the ease of a mechanical pump. Usually nothing to go wrong just change the oil in the sea pump every year! The electric pumps are nice as long as they are wired right using a Hobbs switch to turn them on and off. I like to use a 15 lb Hobbs switch if I have to plumb one so it will usually come on and supply fuel shortly after cranking the engine and it starts to make oil pressure. I also like to add a bipass switch so I can run the pump directly if its already been running but the bowl are empty from changing jets or something (Like most older Cigarettes had). Plus you should make sure that you mount the electric pump low enough to help aid in the pump pulling fuel from the tank. You want to make sure also that you run a real good fuel filter in front of the electric pump due to you dont want any crap getting into the small screen or bipass valve inside the pump! That will make for BIG problems a year or two down the road. Aeromotive is a nice choice for a pump and you will want to run a good regulator that easy to adjust and will hold a steady pressure. Braided stainless hose with pretty blue fitting?? THROW THEM AWAY!! Try to use eather a rubber push lock hose with brass or stainless fittings or bend them custom out of stainless pipe. Too many times I have seen a fitting fail or start to fail from salt water getting into the hose and fitting and start to grow and splits the fuel line or hose end. Pushloc fittings dont do this. Not to mention if your racing the boat its one less thing to go wrong and it looks ok on a nicely dressed engine! Remember, CHROME DONT GET YOU HOME, BUT IT LOOKS GOOD WHEN YOUR GETTING TOWED IN!!:lolhit:

aeromotive A1000 would be over kill N/A but their A2000 is a great carb pump...have one if you need it..Rob

Cool to see you getting all this dOne. I have been to shop since the birth of your boat and just saw them painting the motors. Good looking boat.
I run mechanical fuel pumps. No wiring and nothing really to go wrong. I have had to many electrical fuel pumps fail but never a mech one.

FWIW, In 30 yrs of messing with performance boats, I've only had one electric fuel pump fail and that was because of low voltage to the pump. I've had several mechanical pumps wipe out the fuel pump cam lobe resulting in dangerously low fuel pressures and sending metal through the engine.

My last rebuild, (Mark IV, block mount pump) we purposely eliminated the mechanical pumps as I feel the high volume pumps prematurely wear out the cam lobe. Eliminating another source of wear in the engine. Special push rods still did not help.

Kurt

After talking with Will last night we decided, we are going to go with a big volume pump with a return with all brass push locks. As usual just looking for the best deal (new). Funny, in the beginning you just write a check and say screw it. Now toward the end we're starting to watch the nickel and dime factor but keeping with quality.

Thanks for the comp. I'm very excited. Glad you enjoy your visits. I wish I lived closer so I could haunt him all the time:-)myself.

A1000 is a big pump. Pulls a good bit of juice as well, if you care about your electrical drain.

Don't think that is what we are using, but similer.

I put a Holley blue pump in my boat last year. I am going to have to change it out again before I'm up and running with my new motor I'm putting together. I'm considering upgrading a weldon pump for dependability reasons. Shortly after I installed the Holley blue pump (probably 20 hours) I ran the boat fairly hard on a long run one day and it overheated and seized up on me at a Marina. Fortunately, it didn't leave me stranded because after an hour (while all stoped for lunch) it had cooled down and started working again. I haven't had any more issues with it but it's on the list of parts to replace this winter because I don't feel it's dependable. The Holley is also a "pusher" style pump so to get it to work properly it has to be placed as close to the gas tank as possible. From what I understand, the weldon pumps are great pieces. They are made in several different types and sizes to fit different needs. They are a bit pricey (imo) but might be worth checking into. Best of luck to you. Mark

I went over to push locks and they are soooo much better. My pretty an fittings didn't last a year in the salt.
Have you finished pickin out your interior yet? Had an idea.

yep. interor decided. What ? You didn't see a makered up piece of paper from a spiral notebook floating around on the floor with the color plan on it? Some things just don't get very technical. lol

I run a 690 hp 509 in my baja and i used the big mallory electric pump with a new bigger pick up in the tank i had made,also bought a nice aeromotive regulator and it works great-no problems in two summers of hard running.

540 with 718 hp biggest holley with there reg.ans big gas lines