460 (super cobra jet heads)

[1riverrat]

Lakes then what should he do to the exhaust posts as for as smoothing them out? Also I’m sure your aware that they make dish pistons so you can build a 557 at 10.5:1, 545 at 10.2:1, a 533 at 10:1, and a 521 at 9.8:1. I do not see running 114 octane in any one of these combos.

[LakesOnly]

1riverrat:
Lakes then what should he do to the exhaust posts as for as smoothing them out? Also I’m sure your aware that they make dish pistons so you can build a 557 at 10.5:1, 545 at 10.2:1, a 533 at 10:1, and a 521 at 9.8:1. I do not see running 114 octane in any one of these combos. Rat,
First, I aplogize for my intial smart-ass post here; it is now amended.
My point in my previous post (above) is that in order for those heads provide flow characteristics that would best benefit Hercules application (3000-6000 rpm), they would have to be bolted to damn near an 800 cubic inch engine. This would have a 6-inch stroke and compression would be exceedingly high with available pistons and/or overpriced custom ones. Not to mention that, depending on the condition of Dan's hull, it may rip itself drom his engine-length stringers.
Sure, the current engine will run as it is. It runs now. And it's a mis-match. Different heads will actually be advantageous for the build and his specific application.
We already covered this issue at the very beginning of this thread on page one.
LO
[ August 08, 2003, 07:49 AM: Message edited by: LakesOnly ]

[Danhercules]

LakesOnly:
Look at this, Dennis:
It's a stock, dime-a-dozen D1VE 460 block .030" over, a stock stroke 460 crank .010" under, and D3VE (lowest compression passenger car) heads. And some bolt-ons like any other ***boat:
[img]http://www.***boat.com/image_center/data/520/350New_Motor_Overhead-med.jpg[/img]
580 Horsepower@5400 with 10.5:1 pistons and a middle-of-the-road hyd camshaft. It pushes my boat to 80 mph without shoe or ride plate.
LO Is that your plant LO? Looks good. I would love to get that much HP out of mine. Would a tunnel intake help you more?
By the way, a little update, I am now spinning 5100 rpms. she's going up and up. The holeshot is worse now too. Later that weekend I sucked some mud to.
cry The pump is comming apart for sure. I am taking it real easy now, and until the end of the season untill I change the chain and do some motor mods.
Keep on bringing the info guys, you gearheads rock!!!