Ok so the chart tells me what HP, what RPM's but it doesn't say anything I could see
about the flow out the jet?

I have a 12JE with an A impeller turning 5200 RPM's

If I put on my AA impeller and it turns the RPM's at the rated HP what will that do to flow?
How would that calculate to Speed with everything else being the same?  Meaning same boat
just change the impeller.

Will the boat have a higher top end or lower?   

$1200 sounds conservative    but then I do tend to get carried away 

Oppps.  I was talking Ford.  I didn't think chevys were worth priming 
Glad ya got it figured out   

You'll pump forever clockwise.....  go counter clockwise and see what happens 

If you aren't dead nuts full bore balls to the walls race why would you do that?
I think most people put them in their cars to fake a supercharger 

I doubt an engine would run long enough to break either setup with quality
parts in a boat.

That's just my opinion as I have never used one.

I'm on hold right now till our contract is ratified.  Thank you all for your input.

I have two thoughts.

1.  If the pump and tanks are ok the float is sticking UP in your carb.
2.  If the carb is ok you have a leak sucking air between the pump and tank.

You've proven everything else to work.

Where's the best place to get these?  The seem to be just what I need.  Thanks
Ralph

Has anyone ever tried the keith black kb855 forged flat tops?

Running 5000 rpms I just don't see the need for $800 pistons.

Opinions??

www.berkeleyjet.com

go to 12je parts listing, you'll see the whole exploded view there.

 #12  is the bowl gasket

#10 is the seal that's leaking

#8  is the bushings inside the seal 

I agree with the above post.  Tom was a big help getting me started too. 
Thank you again Tom   

   That's one of the joys of boat ownership..

The pop at start up doesn't mean the timing is off, you're just lean.  If the timing were the
cause it wouldn't just be at start up.  Is it dogging?  Knocking??

 I agree you may have a blown power valve too from the back fire.  You may also be running the wrong power valves.  If you're dumping fuel from them when it's not needed you'll see the gas pumps more often.

Your fuel consumption  depends on your miles traveled and what you were doing.   Plowing pulling a tube will suck you dry with only a few miles traveled.  My boat fully loaded uses more gas than just two people in the boat too.

I use around 24 gallons when we run up the lake and back,  that's about 26 miles one way.   I usually cruise around 38 mph.   23' with a modified 460.  Remember the old saying:

                                        "you'll pay when you play"
 

Aluminum flywheels really let the engine rev fast.... don't fly out of the water
without a rev limiter   

Well, here's what I have to work with on this short block.

Freed up is the Edelbrock Victor available is the RPM air gap

Pistons are  flat tops.

Cam is the Comp  278 Xtreme marine installed at this time.

comp roller rockers and push rods with the stud girdle

carb is the 850 holley

dist is the msd marine plug and play with a 6AL box and accel coil

oil pan is the 10 quart armondo

It's a 1976 block, has not been decked.

Would this fit into the relm of the Trick Flows?
What other parts would you put on if something needs changed.

Remember 5500 rpms on top

Thank you Ralph for your advice