Just read an article on a new LS marine engine to be introduced by Mast Motorsports. I had never heard of them but just checked out their website. They appear to have a lot of experience with the LS engine platform and are taking their first stab at a marine application. Looks like they have done their homework. Should be interesting.

The article is in the new Sportboat magazine.

DA Link

http://www.mastmotorsports.com/2010/...=Marine&id=396

Looks like a promising platform for sure. Less weight is a big benefit of them.

Wonder what their pricing is going to be.

They contacted ME around 1-2 years ago, wanting me to offer their units thru my shop and not long after Ray @ Raylar had released his LSM550 if I remember correctly..

They couldn't give me the answers on what to really expect out of it, nor what they would provide with it. They also could not get their pricing in order for me nor tell me what was or included part wise/rigging wise on their engine assembly that was supposedly ready to run..

When I looked into it a little closer before ultimately deciding I had no interest in offering thier product for at least the time being. It was evident that Ray @ Raylar had a unit or units that were similar, finished & running in the real world unlike MAST. Also Ray had complete kit pricing & a preset package with what it would need to run right..

My decision at that point was, If I were to offer a platform like that to a customer it would likely be Ray's set up. The biggest hindrance was then & probably still now today --- The expense.. They are a pricey bugger..

Again that was all based on a while back.... I have not followed them since & maybe they have the engine and pricing sorted out by now.. I do know I would ask a lot of questions & do some homework before thinking of using their unit..

J

Yes, I have to agree that it doesn't look like a complete marine package is really thought out just yet. They definitely appear to have experience making serious HP on the LS platform. The one video has the engine on sustained wide open dyno pulls using 89 octane fuel. First pull is at 5800 rpm for 10 minutes, then 4000 rpm for 10 minutes, then 2000 rpm. All at wide open throttle I guess showing the ability to prevent detonation even with reduced octane(?). It has a custom 10 quart oil pan to keep things cooler as well.

http://www.mastmotorsports.com/2010/video-view.php?id=7

It is good to see more companies marinizing these LS engines. IMO I think it will just be a matter of time before a number of reliable and proven LS options are out there, along with a drop in cost as numbers increase. Mast also points out that this engine runs so clean they meet future EPA requirements without the need for a catalytic converter.

I bought over a year ago a mast motorsport programmable ecm and engine wiring for my ls marine engine project and discussed my idears whit them ,they where really a good help and gived me any info and advice I asked for and put in a standard program so I can go from that ,they even contacted me after the purchase a few times to here the progress .
How ever the marine version is a long story and not sure if it's totally ready know ,mine go's on the dyno whit in the next 2 weeks ,forged rotation assembly ls 2 whit ls3 heads and dry sump system from the ls 7 .


I followed there website from the purchase to now and they are deffently not sitting still !!

How much you thinking?

Do the LS engines use the same motor mounts as an old style small block?

It will be between 550 to 600hp ,just stopped by the shop and go friday morning to mount the last things on the engine like the aternator and install exhaust and all hoses ,after that we build it on the dyno and hope to start it up in the afternoon to dail in .
hopefully I have some real numbers this weekend .

No, but if you look around their are conversion mounts to go in to the sbc/bbc spots.