Nissan Titan 5.6 V8

[Fearless]

built 427 lsx with some 4 valve heads.
most wicked LS heads ever. end of thread, lol.

[455maveric]

now if they where DOHC heads then yes over but there 4 valve push rod heads

[gregpro50]

another engine would be the 5.4 dohc ford that is in the Lincion navigator

The supercharged version for the F-150 Lightning would be tits in a jet boat.

[BRB]

as u know the reason for the ol big blk jet boat thing is "CUBIC INCHES & TORQUE" just that simple...........especially for a jetboat

[speedboats]

LSX, something like this?




We used the FAST XIM to run the ignition, had a high failure rate (half failed to run the ignition correctly), so have switched to the MSD product. Remember that on the LS2 and later they run a 56 tooth reluctor wheel on the crank, so need the appropriate software. Else we re-flash the Delphi ECU (no dramas once you have a copy to use), and the exhaust manifolds we have off-the-shelf.

A few guys here are looking at doing the Nissan 5.6, so shall pay some attention their way...

[455maveric]

I say they like weight savings more than torque all take a light 600 HP light weight high rpm engine over a 300 pound heavier engine with 600 HP and lower rpm and high torque. i can have the impella cut for the higher rpm and i dont think any one wants a big inch deisel thats high torque and big inch.

[speedboats]

built 427 lsx with some 4 valve heads.
most wicked LS heads ever. end of thread, lol.

Way cool, imagine if there was forced induction on top of that, along with an optimised cam!!!

Still, can buy a crate LS2 for that money, or just about have an LSx 427ci made (600+hp).

GM said at the time the LS1 was released there was no advantage to running DOHC. Weighing the 4.0L Toyota 1UZFE comes in not much lighter than an SBC with alloy intake manifold and water pump, while the LSx weighs in at 387lbs. The extra 3 cams, valves and springs make a huge difference...

[BRB]

i know a guy turns a 468 9600rpm.... the small blk wont make the torque through the rpm band...you'll have to prove it to me...........thats why the jetboat drag boats use big blk!!

[455maveric]

yup we all owen 6000 hp drag boats. 99 precent of us have boats that have 600 hp or less i bet, so up to the 1200 hp point all take the light weight engine

[BRB]

my point is a boat aint like a car the boat takes more continuous torque---so it would take a expensive small blk to off set the weight aspect of it plus higher rpm's dont mean squat if ya dont have the torque...u can buy a crate 572 for 14000range ud have damn neer that much or equal in a small blk and not out run it......i would luv to see a test though...

[BRB]

in ur case id try a 400small blk sounds like would be great for ya

[BRB]

.........

[D.B.S]

A crate 572 would be bad *ss in a good running jet hull.

[455maveric]

Ok lets put it this way i had a blown 377 SBC 600 + HP in a 19 foot daytona turned 6200 rpm and said 85 on the speedo. then i wen to school in Huston TX for engines sold the 377 built a 454 that dynoed at 625 HP.I went back put it in my same boat it turned 6200 rpm and went 81 on the speedo so what changed to slowe it down just the weight

[speedboats]

in a good running jet hull.

You may have knocked the nail on the head there....

455maveric, what numbers are you wanting to get from your boat? (Realistically, everyone wants to do a 100...)