LSX Tall Deck Engine
 

Anyone using or seeing a place for the (LSX Tall Deck Engine) in the marine world over a (10.200 Tall Deck) Big Block?

Ole adage no replacement for displacement, but the LSX is built well from a design perspective.
Curious on thoughts or potential benefits others are seeing in the offshore world?


Thank you
Cougarman

Doesn't seem to have caught on, with a SC they put a lot of power out. I think it could be because everyone sticks with the old design BBC since they just don't want to change or just move to OB's.

Perhaps not as many custom engines anymore with the Merc line up too

Nice thanks for sharing
Looks to be the standard height block

Yes in the standard height 6.2 there are some nice power if replacing 500-550HP BBC but $$$$$

This thing is cool with direct injection but cost for one you can build tow BBC's.

https://marineenginedepot.com/new-62...-airpac-620-hp

https://www.kemequipment.com/marine-...#product-title

600 ft lbs at 3000 rpm, not bad for a little motor.

This is the tall deck right?

https://www.kemequipment.com/marine-...#product-title

The LSX is listed for under 20 grand , add another 1200 for closed cooling and another grand for misc to mate to a bravo. Not a bad deal really.

This one looks to be a tall deck... (LSX)
Nice find for off the shelf persay...

If that is based on the CPP LSX 454, which I'd heavily guess it is. It has the same bore and stroke.
It is not a tall deck. It has the standard production 9.240" deck height.

CPP offers LSX blocks in 9.240" and 9.720" deck.
Dart offers various LS derivation blocks in 9.240", 9.450", and 9.750" deck.

I think we are going to start seeing some cool builds very soon from guys starting with the 8.8L PSI "R" blocks. They have a forged crank, 4.5 stroke. I believe it's a 10.24" deck height. This is the LS big block that GM designed but never actually put into production, now PSI has the rights and is producing it for industrial applications.

Have a link for more info?

8.8 Liter - Power Solutions International, Inc. (psiengines.com) ??

Yup that's it

Nice to see specs on Deck height?

I’m not sure they’ll take off, maybe if they are dirt cheap. You can’t put as much bore in them as a dart big M.

Supposedly based on the Gen 7 8100. Utilize a bigger bore and stroke over the 8100. They bought rights from GM is the word.
So as 87Mirage said should be 10.24"

They are hashed over in this thread if you missed it.
https://www.offshoreonly.com/forums/...ter-550ci.html

I doubt it also. Especially if the PSI are non-siamese. So 4.350" max bore more than likely.
Most already nearly despise the 8100 or 496 in the marine world as oddballs and their differences compared to the Mark IV, Gen V, and VI.

I think they could be cool if you can make decent power with stock or near stock heads and intake, would be a nice budget combo. Also would be sweet for power in a truck.

PSI makes 2 types of the 8.8L. One is built like the traditional Gen 7 BBC, the other is the LS version with a different block and heads, intake etc. The injectors go into the head on the LS version.

I believe some of the PSI blocks were built by Dart, not sure if all of them are. The PSI block is a lot more stout than the GM version of the gen 7. I know guys are buying PSI core engines off Ebay for under $2k and starting to figure these things out. Arizona Speed was involved in modifying the PSI intake on the LS version to get the runner length correct for marine applications. Even with the PSI camshaft that was super low lift and designed for industrial low HP, it turned over 500HP on the dyno. So these things will turn some good numbers once the formula is figured out. But as said earlier the gen 7 is the redheaded stepchild so even if the PSI platform works out it will struggle to gain unanimous traction from the purists.

I'd agree.
I get the head and the rest of the induction system.
What have you come across as far as the blocks being different?

The LS style gen 7 block is very different as you can see below.

https://cimg5.ibsrv.net/gimg/www.off...9783c3bc1.jpeg