Ratchet

Jspeed - I agree, for that kinda money, you can do quite a bit.

As later said, the numbers are no good, but I had someone check today. They still are not available yet, but the short block is to be about $73-7400, and the long block about $10,500.

chromecat

when are they gonna be available....


Don

Biggus

I was wondering the same as Raypanic, Why .060 over and the 4.375 stroke as opposed to the standard 572 with 4.5 bore and 4.5 stroke. Is the shorter stroke to avoid the piston side loading with the 4.5 stroke?

Why is the Merc 900SC based on a 540 block and the 800 is a 572?

Ratchet

There was no ETA on those that we could find.

As for the bore stroke combo, there are a few different ones that get you to 572. There are a lot of theories about rod length vs stroke & bore vs stroke. I think this combo was built by "choice" I'm not sure of the max stroke without clearancing. This may also have something to do with it ?

These blocks (or at least the one's we've torn apart) are hard, and usually just require a "dusting" to clean up. It's not like boring / honing a stock block. I guess if you dont really scatter anything, you could easily get a few rebuilds out of it by just dusting the bores.

Just my .02

If I get any more info, I will let you know.

RumRunner

The Deluxe 9:1 engine P/N 12498793. These engines are being built at this time. They should be available very quickly. Popular Hot Rodding magazine just did a test on this engine. With a little timing work they got over 700 HP @ 5800, and 711 FT/LBS @ 4500.

Viper31

I stopped by GM Perf. Parts trailer at the Charlotte Goodguys show last weekend and the rep showed me pricing of $7,500 for shortblock and $9,800 for longblock. He was not sure about availability though.

Vinny P

These motors sound great when you first think about it. But, after really looking into it, I don't feel it is the best for marine application. I think you can build a better one from scratch by yourself. First, I have not been able to find anyone who knows the exact cam specs, so I will consider that it most likely will not work in a boat. Next, the valves are not Inconel, so you would most likely want to change them. It's a tall deck block, so if you already have aftermarket exhaust, your risers or headers won't line up with your tips. Of course, this is assuming that we are talking about a long block.

TomR

Looks Cool!!
But I am also of the opinion that you could build bigger HP for that kind of $$.

sleeker

i just had a merlin marine 555ci built and dynoed.merlin 3 block,merlin jenkins heads with a little bowl work,225 severe duty ss intake valves 188 inconel exhust valves,callies dragon slayer crank,je pistons,manly billit I beam rods,hyd roller cam,crane rockers,arp head and main studs,merlin marine 4500 intake,gary williams prepped 1050 marine dominator,ati super dampner balancer,moroso pan,msd distributer and wires,complete motor inc dyno made 704hp@5800 and over [email protected] $10.500 price was 10.000 with eagle h beam rods i upgraded to the billit manlys for 500 more.

chromecat

sleeker,
where did you get your motor built at or did you do it. ? are they a package or is that what you had built "custom". i'm ready to do something with my boat. could you email me specs ? and prices ?

[email protected]

thanks
Don