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375hp small block-stock

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Old 12-22-2006, 11:53 AM
  #11
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Default Re: 375hp small block-stock

If Mercury ever gets around to marinizing the LS1-2-6-7 series of motors the 350 and standard 496 will be history. They already have them in boats over in Aussie land with Merc drives but not by Mercury..
400-500 reliable hp from a stock non modded smallblock ..

PS: that motor from Crusader is an LS2
definately not a traditional 350 chevy based motor.
Guess they are ahead of the game on this one..

Last edited by HTRDLNCN; 12-22-2006 at 12:08 PM.
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Old 12-22-2006, 02:05 PM
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Default Re: 375hp small block-stock

Guys, that's "just" a 6.0L GM truck engine marinized by Crusader. I think you can still find stuff on GM Powertrain's marine website.
In the truck world it's an LQ4 or LQ9 depending on which pistons it got. LQ4 got your standard 9.x comp ratio, LQ9 got 10.0 pistons. And yeah, the aussies have been all over marinizing the LS-x for years now; somebody down there makes decent stainless exhausts WITH O2 sensor bungs.
I think they share the same bellhousing bolt pattern as the "original" GM smallblock, but with aluminum heads and composite intake they've got to be lighter. Plus there's tons of off the shelf custom tuning software if you use the land-based ECU.
I'm just guessing here, but my $1 bet is the LS-7, 427ci small block will be the basis for what replaces big blocks in the future. Imagine the fuel savings with Displacement on Demand during all your idle/no wake zones.
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Old 12-22-2006, 02:20 PM
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Default Re: 375hp small block-stock

Quote:
Originally Posted by Sydwayz
Mercury offered the 377 Scorpion for a couple years which was a similar package. They were handbuilt and badged under Mercury Racing. There were a few twin engine 28 Donzis built as such, but they are rare to see today.

The Scorpion was built as a high RPM racing motor. I don't know about the Crusader, but with that coupled transmission, I have to guess it's best suited for ski-boats and cruisers with V-drives/Inboards; and lower RPMs with tall torque numbers.
The current 6.2 motor is 377 ci and puts out 320 HP. It is a very popular motor in everything from Fountain's to Sea Rays. I have a pair in my Sunsation 32 and the 6600 LB Dryweight/ Non stepped boat will hit 73 MPH GPS. After 200+ hours they have been great short of a fuel pump. They are also very insurance friendly.
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Old 12-22-2006, 02:53 PM
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Default Re: 375hp small block-stock

Quote:
Originally Posted by Jupiter Sunsation
The current 6.2 motor is 377 ci and puts out 320 HP. It is a very popular motor in everything from Fountain's to Sea Rays. I have a pair in my Sunsation 32 and the 6600 LB Dryweight/ Non stepped boat will hit 73 MPH GPS. After 200+ hours they have been great short of a fuel pump. They are also very insurance friendly.
I have a good friend with twin 6.2/320s in his 31 Sonic, and it runs very well, and he is ALWAYS troublefree boating. The boat could definitely use the additional punch of 110HP though; and it would well within the tolerable HP range of today's POS B1 drives.

This is the discontinued Mercury Racing 6.2 Scorpion rated at 377HP. 1HP/CI is a pretty good ratio.

http://brucebullockmarine.com/mercur..._scorpion.html

Another interesting Mercury Website that I did not know about:
http://www.black-scorpion.com/
The 330HP and 340HP Mercruiser versions marketed toward tow/ski/wakeboard boats.

Last edited by Sydwayz; 12-22-2006 at 03:02 PM.
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