Rune

Anyone know if this has been done, or if any company is doing this.
I am looking to get a blown LS7 into a fairly fast boat, goal is 100 MPH :-)

So if anyone could point me in the right directions ?


TIA


regards
Rune

V8_DSM_V8again

You are better off with a LS1 stroker... About as much cu/in as a LS7 in a marine application.. Althought I would actually run the newest generation big block bowtie motor 8100 vortec... I would run LS1 coils and a motec, halltech etc EMS with a crank trigger...

There are alot of ways to go but in a constant RPM marine application where TQ is king the BBC rules...

EPP

iTrader: (22)

I haven't see any LS1 equipped boats yet, which is surprising. I was thinking of swapping out the 351 Windsor in my old Correct Craft with an LS1 based engine. Bob

V8_DSM_V8again

An aluminum block LS1 would help you some...

We ran into the 90mph range with a JET DRIVE on a fiberglass speedboat about 16.5' that had a naturally aspirated 455 olds with a edelbrock manifold, carb and marine cam..... Its all about TQ on boats.... Yes it was nuts...

I still say big block + big belt drive supercharger....

Maybe even a big *** thumper turbo..

Remember air to water intercooing is so easy to do on a boat... You dont need an exchanger or water tank.

Rune

I was thinking LS2 or LS7 427 cui, with a Kennebell Blower, BS3 or any other intelligent managment system
Should give me my TQ and RPM scale needed to go fast :-)

But i have not heard of any company making marine parts for the LS1, ie, Exhaust manifoils with water jackets (cooling) etc.

A 427 500 hp and 500 TQ + Kennebell 10 psi should net me atleast 700 Hp and 700 TQ ?

Rune

V8_DSM_V8again

That is reason 2 to look at the 8100...

Reason 3 is the rod ratio combined with being a constant RPM application...

Big blocks are popular for a reason in the marine industry.

http://powerandmotoryacht.com/engines/0101vortec/

IMHO get a 8100 from a yard.. Build it up and drop the compression.. then get ahold of the marine manifolds and air to water the kennebell and belt it for 5000 rpm max... Easily surpass the 700 and it will last alot longer.

LS1GMCTruck

iTrader: (2)

It's the hull that you choose & the rigging, more so than the power sometimes. An air entrapment hull(tunnel or catamaran) has an advantage of 15-40 m.p.h., with the same power...again, this depends on the rigging. Will you be using a straight shaft surface-drive, a sterndrive, a V-drive, a straight inboard shaft, or??? What boat are using? Gar

blacktavert

i think the mastercraft ski boats used to use some sort of a version of the ls1 engine, now you can get a 6 liter LQ9 in them i believe,
i think a marine engine is built completely different from a automobile engine, i dont think a engine directly out of a car would last too long, marine engines are built to run high rpms for extended periods of time

Rune

Its a 24 feet powerboat, called Hydrolift "fly without wings"
stepped hull, single V hull, but manage 74 knots with a "old" EFI equipped Pocharged 400 cui big block (i think) rated @ 505 Hp.

A C5R 427 can run for WOT 24 hours and still live to tell the tale, so i was hoping to try this route.. :-)
But problem is marine equipment around engine.

V8_DSM_V8again

The 8100 is 420hp in gm parts trim no forced induction..

Some head work, aftermarket cam and of course the charger and the power you want is easy to make.

grooves12

You can get the Vortec 6000 in marine packages from many sources... which is essentially the LQ4/LQ9 used in the trucks... this is a variant on the LS1. The LQ4 was tested/certified as a Marine engine due to their being stricter reliability standards, and they wanted their workhorse truck engine to be super-reliable. The components... other than the computer programming are exactly the same. (With the exception of exhaust manifolds/fire suppressors/and other marine related bolt-ons.)

Rune

i found a link regarding LS1 into a boat, seems all marine equipment is available.
I tried to email them, but no reply so far....
http://www.indmar.com/index.cfm?reset=1



this guy has a boat with Ls1 installed

http://www.davedrive.com/v_2000_malibu_lx.htm


Anyone have more info ?

Mystic96

I'm all about it...I just need to find a nice finished out hull in need of a motor!

My friend has a 19' Liberator with a 250 Merc Outboard on it, I couldn't imagine something that size or just a bit bigger with the power of a lightweight LS1 pushing it...

'JustDreamin'

Hey Guys...

I don't know if the LSx series motor has enough displacement for your speed (and therefore power) goals at the kind of duty cycle that a boat sees. But I do know they're being put in a variety of boats these days.

Here's a link to a previous discussion: https://ls1tech.com/forums/showthrea...manifolds+boat (Use the search function, it really works)
I know it has some info on exhaust manifolds (at least factory ones, don't have any idea if aftermarket ones are available yet).

'Dreamin'

Keith

There is a 6.0L offered by GM as a marine engine, so the manifolds should be out there somewhere.

http://www.gm.com/automotive/gmpower...000_marine.pdf

'JustDreamin'

Yes the 6.0l is available as a marine engine, but I don't think the manifolds are usually supplied by GM. I think thats up to the individual marinizer. Not sure of that, though.

'Dreamin'

Spenser309

malibu's up to 2006 are availiable with LS1's. However they are getting rid of the option this year.

SmokingWS6

iTrader: (1)

Here ya go!

https://ls1tech.com/forums/conversions-swaps/332942-hybrid-pics-mocking-engine-up-not-56k.html

It'll be a heads/cam setup this year. Possibly twin turbo next

mongse

iTrader: (2)

Heh, I need to get Scott his turbo for that project too. Oops.

Keith

I just had an idea.

What about pumping the water that has passed through the block already through the air injection ports or the EGR pickup on stock LSx manifolds?