Indmar ls 6.2 supercharged marine engine
 

Was just reading about this motor which is the one used on new Cadillacs , a detuned zr vette motor. It is now being offered for marine applications in 550hp model, does anyone have any experience with this powerplant

I think they are used in Mastercraft ski/wakeboard boats. I would like to know how the torque would differ in a performance boat. Additionally, what is changed to go from wakeboard to performance?

I not sure they do this but I imagine it would be crammed for low end torque. Wakeboard boats top out at 45 so it's all out of the hole acceleration and pulling skiers hard.
They may just keep it all the same and put manifolds on it. That motor is pretty torque as is.

Yes, it is the exact same base engine that I gave you a price on 2 weeks ago when you enquired.. It doesn't share much with the LS9 corvette engine, but it's a great little motor and I think the same one used in the 557 outboards. GM Powertrain produces several base industrial and marine engines and various manufacturers put their marine gear on them and sell them. Some are the same engines sold through GM Performance parts, and some are very different.

Anyway, back to the LSA.. It's about 18k retail with a digital dash, requires 93 octane to make 550hp, has cast pistons, and on heavier boats it often ends up cruising under boost which makes it very thirsty. It is very smooth and makes lots of torque for it's size and if you can set it up to cruise outside of boost it is quite efficient. For a performance boat it needs a recal because most oem's set them up with a 5100rpm rev limit. They are commonly used in aluminum jet boats, and some ski boats. They're a great package and you can bump them up to 600hp quite easily but then you're gonna want to get some forged pistons, and while you're in there maybe upgrade the powder metal rods, or the cast/nodular cank, etc.. It gets expensive quick. I'm a huge LS fan and sell LSA's and LS3's but for 18K you can build an aluminum headed efi'd BBC that'll make the same or more power on 87 octane..

Originalronza, when's construction starting on your boat?...

I have experience with the LS motors in all these wakebooard boats thru out. PCM and Indmar are offering the version of this. The new 550 hp super charged motor has just come out for both PCM & Indmar for the marine end of things. I have seen both in person and are GM LSA 6.2L Supercharged based.

Listed as 376 CID - HP 550 hp @ 5400 rpms / 545 ft -lbs torque @ 4000 rpms,

467 lbs dry / full long block weight.

Sequential fuel injection, 93 octane is recommended but not required by both.

hydraulic roller valve lifters / 2 valves per cyc.
4 lobe rotor supercharger,
stacked plate aluminum oil cooler,
forged steel crankshaft,
piston oil spray cooling,
stainless steel fuel lines
also one uses CMI for the exhaust headers which I think was PCM and I think Indmar makes their own for this app among other motors in their line up.

When everything is finalized. Hopefully this spring

http://gmpowertrain.com/Libraries/Ma...rine.sflb.ashx

Jeff

Hesus that's light! Looks like a bad-ass engine but I have to wonder why cast pistons in a SC engine???

Onlyhad one experience with a 6.2 it had ridiculous piston slap when it was cold. Sounded like a diesel. Apparently a common issue.. once it was warmed up with 91 octane it had some serious pull! Not sure I would want it in a heavy load marine application.

Indmar charges 13k for this motor with the harness which is not a bad deal as it would work great for a project like yours

I got a quote a little less than that thru dealer I know. I think it's a great package at 555 hp, 460lbs and a 5 year warranty, looks cool also

So is that with cast or forged internals?

Please post a link to where you can buy this engine for $5000 less then the three or four other manufacturers selling this package. Originalronza what's the name of the dealer that quoted you an even cheaper price? I'll buy a couple right now. Also, the 460lbs is for the base long block without marine accessories..

Mastercraft has used ILMOR engines exclusively for about a year now. Ilmor offers a non-supercharged 522 horsepower engine with far better internals:
Ilmor 7.4 / 522 thread

In 3 to 6 months as far as major OEM marine engines Mercruiser / Mercury Racing & Ilmor will be the only one's left offering Big Blocks everyone else either has all LS motors or at least one LS motor to replace their big block offering.

The weight as I was told by Indmar was 467 lbs for the base like the pic in the GM performance website as I called it a full long block - the block, intake manifold and heads are aluminum.

we know you work for penke and are a cheerleader but i worry about the cost of anything ilmor. the cost of the cadilac motor for these boats is relatibvely inexpensive. i belive they are great for what they are, small, lightweight, and powerful but most of all they are afforadable which is the key in todays world

Ilmor makes a great motor also, but is twice the price. The indmar has a std 3 year warranty and a 5 year they offer, that is unheard of in marine power with 555 hp. It is a proven power plant being used in Cadillacs sts, camaro,s and vettes. Less weight than 1 bbc.

Boatlesss, can you get me the contact info or a link to the $13000 LSA? Thanks.

If I recall correctly I think the reason for the cast pistons was all the complaints on the auto side about the piston slap being forged aluminun years ago. After the motor was fully warmed up and the piston expanded from the heat the slap went away on most of them but not all. A cold motor the piston slap was pretty darn loud. Again I think the cast piston took care of the slap but not 100% 4 sure.

He can get sick deals! He can also get 525/XR packages for only $2k more than a 502HO/X package.

My price is 33k for the 525/xr and 25k for the ho/xr package, 8k more Oem pricing

Originalronza is that for new not reman packages, if not and these are new packages then are you a boat manufacturer because I know all the prices for boat manu's buying OEM marine packages and dealer costs. Their is a different price between the 2 as the boat manu's is less.

These are new Oem prices

BigScotty? Is that you? :lolhit:

originalronza= Jim Darr

So that would mean those deals are more like Wishes?
I have seen that name on other wish list's.
Like, Wish I could get my $$ back.