315's on a 565 at that rpm are a nice combination!

Yes, I would undoubtabey have to agree.

Also, I think it was back in 2006 in my 32' AT, that I was running along the side of a 36' Apache with a stepped hull up at Hardy Dam,....and if I remember correctly, he was supposedly running a pair of 800+hp Vortec supercharged engines...we ran full throttle side by side for a minimum of about 7 minutes...I squeaked him by a hair. My point is, even if he "squeaked" me by a hair, my boat was a runner with those AFR 315cc heads on naturally aspirated 565cid's and very mild hydraulic roller cams that would idle sweetly at 650-700rpm in Neutral. Those freakin' engines were/are some runners with some really sweet docking manners.

I will add that the engines were built by Dave Wesseldyk of Wesco Racing Engines and the head and cam combination were provided by Bob Madara of Marine Kinetics. Excellent and very intelligent guys to work with.

Probably "blue moon" the 36 apache ? That boat runs well. He used to tak that thing everywhere, lots and lots of hours on it. I think ben at precision built the engines ?

I remember reading about your 565 builds back then. Didnt Jim valako do some work on the heads ?

It was shortly after that Bob Madera did a hyd roller cam for my afr headed 540 that made 657hp with blower belt off at only 8.4-1 with a highly modified 502 mpi intake and throttle body/315 AFR'S, 1115 hp on 80% 92 20%/110 race gas, 1057hp on straight 92 octane with pulley I ran 95% of the time, I had raced you back when I had my 950 hp motor in the Baja several times, MEMORY'S!! That 657 pull was with lightweight oil, it was in high 640's with the 20w50 in it, no water pump or accesorys so in boat Im sure it was a little lower. I tried running the thinner oil in boat and even with large cooler and 14 qt pan the pressure made me nervous at 40 ish psi hot! Smitty

Those 315 heads flow good. My buddy joes 522ci with 315 afrs, 10-71 littlefields, made 1036hp with 10lbs boost this past spring, and great torque.

I wish I could go back to this time last year.... ugh

Yes Joe, it was "Blue Moon"...from what I always knew of Steve (the owner), he always built his own engines himself, but I think he had Ben at Precision Power dyno them or help him in some way.

It was when I had my 565cid engines built by Dave W back in 2005 that I had installed the 315cc AFR's that I had gotten from Bob M. It was the couple years prior to 2005 that I had some Dart Pro-1 310cc as cast heads that he had ported and those were on my 540cid engines before turning them into the 565cid's. I sold those Dart Pro-1's to "Tinkerer"

I could not modify or edit my previous post,...I meant to say, that Jim Valako ported those Dart Pro-1 310cc heads for me when my engines were 540cid...it was before I turned my engines into 565cid in 2005.

My motor is 612/634,236/244,110.5
540 9.6, iron eagle 320 bowl blend after concentric valve job. Dan davinci 940 carb. 34 degrees. Afr in boat 12.6 ish. 1.7 rocker s stainless. Comp lifters. [ATTACH=CONFIG]548149[/ATTACH]
On pump gas. On motor no blower.

that's crazy, cam is also MUCH less then mine, I plan to dyno and see where I am at, but my 540's are similar with much bigger cam, boats speeds did not change, over my 600 hp engines. what boat are these in? drives and speed?

I am really trying to narrow down my setup and what to change if anything..