Boat1

Congrats on your build, the numbers speak for themself!

Formula311-SR1

I know how hard it was to trip the 70 mark with a 242 LS. Took a lot of fine tuning of an aluminum headed 502 (about 525+ HP) and a shortie to get there for us. Best GPS speed was 73.4 in the end. Actually Bob was very helpful in tuning the motor to get there, even without me ever spending a dime with him at the time.

Anyways, on to the new project
Motors started out as 1995 Gen V 502 mag motors (EFI)
Bored to 509 - 9.2-1 JE pistons
H beam Rods
Stock heads
Crane Roller rockers
HP 500 intake
HP 500 Carb
Thunderbolt IV Ignition
Gil Exhaust without silent choice

Now the cam was setup for the origional EFI setup that I removed, sorry I like the carb better for me. I can work on it, and my goal was to remove this flat tappet cam and go to a good roller from Bob.

Billet Racing Cam
550/558 lift
231/239 Duration
114 Seperation

I have no idea where I am HP wise and I am pretty sure the cam and intake combo are not the best setup. But, that should change when $$$ works out.

Boat1

So the cam listed is flat tappet that you have now, or the proposed hydraulic roller? Have the heads been prepped for .650 lift at the valve, and what are the springs.

jeffswav

I think that is the spec from his current flat tappet cam. Bob can get you one with way more lift and less duration.

Formula311-SR1

jeffswav is correct, the listing is for the existing flat tappet cam.
I plan to upgrade springs, hydrolic roller lifters, and cam from Bob eventually.

Boat1

I pulled some old dyno sheets, found a 509 basically started as carb 502 MAG, GM rectangle heads, GM dual plane I cut the divider down 3/4", Holley HP 950, stock ignition, the cam was Ultradyne flat tappet with your same duration specs but .570 lift both sides. Engine made 508Hp @ 5200 rpm and 538 ftlbs @ 4300 rpm. A good roller cam with same other parts except simple port work to the exhaust side runner floor and short turn, makes 565HP @ 5400 and 575 ftlbs @ 4400 rpm. Fuel distribution is better with a single plane manifold, it is easier to maintain consistent EGT with a single plane. Hope this helps.

Formula311-SR1

That is great information, thanks for the follow up!!!
My goal was anything around 525 HP

Formula311-SR1

Ok, so he didn't listen to Bob (RMbuilder) or me and went with the cam I mentioned in the 496. Honestly what should this thing run like? I think his boat is very forgiving on combinations as far as getting on plane.

Formula311-SR1

No ideas?
He didn't upgrade the oil cooler either

jeffswav

He's a idiot, he should right a song. "Things that make it go BOOM !!!! "