Good day Gentlemen,
I am new to jet boats, but I am not new to boating or working on vehicles.
I picked up a 78 miller 20' boat with a Berkley JC pump and assuming an A impeller. It has cast log manifolds and although I am open to buying some tubular headers, they gotta be through transom. I boat in a busy area with lots of cops.
Its a major project boat, it was setup for a BBC and I intend to run a BBC again.
I have a 454 short block and otherwise I have nothing else on the motor.
The motor is a 2 bolt block with a stock crank and rods, and wiseco domed pistons (I will find out the exact dome, but I think 21cc), ARP main studs and APR rod bolts.
The motor clearances were machined on the looser side (it was gonna go into a weekend car). I will measure everything to find out exact main/rod bearing clearances and piston to bore clearance.
I would like to build this boat to be a fun boat for me, less so a family boat (got one of those), just for me and my buddies to have some fun with.
I need advice on everything lol, but most important right now I need advice on what I should run for bearing/bore clearances, and what kind of top end to purchase to complete this motor.
From what I understand I need to make as much torque as possible (wish it was a stroker but its not). I have some old BBC parts from a Solid Roller motor including Eddy heads, but a friend of mine is interested in those so for the sake of this build I am gonna say I have nothing but the short block.
I am open to buying aluminum heads and even a solid roller setup. I was thinking I could possibly run a roots blower as well with some big chamber heads, but that might be pushing it too far for this project.
Edelbrock has some marine heads with 110cc chambers but they require custom pistons which means I can't even use my new short block.
Any other recommendations? Any opinions against a solid roller? In my experience with them they perform very well everywhere, not just high RPM. I have no problem setting valves.
Let me know what you guys think and which way I should lean. Remember a weekend boat to have some fun and hopefully get decent MPH. My budget isn't too tight..