LSx into Jet Boat??
ls6 Z06 jetboat Well first off I wanna say I didn't think there were anyothers thinking as crazy as me when I started this. Looks like it just took a lil while to catch on. I first started with a 5.3l transpalnt on another boat and now Im at a ls6 in this new boat. I could go on for days on what it will take to do it cuz I have done it all, and yes I did it myself. But I will say this thing turns.
My bro has a mild bbc in his and we are neck and neck.
He still gets me cuz this is only my second boat/ 3rd season as a boat owner and haven't got the launch down yet. But if anyone has any q's on what it takes, just ask.
ps.. i am looking for a cam upgrade, any input would be helpfull.
Happy Boatin !!!!!!!!!!
My bro has a mild bbc in his and we are neck and neck. He still gets me cuz this is only my second boat/ 3rd season as a boat owner and haven't got the launch down yet. But if anyone has any q's on what it takes, just ask.ps.. i am looking for a cam upgrade, any input would be helpfull.
Happy Boatin !!!!!!!!!!
Well I would like alot of mid/top end power to push the jet. I wanna play with the impeller also to get a few more rpms out of it. I would like to turn like 5500. I think I could with a cam and impeller.
Here is where I'm at:
Berkeley E pump don't know impeller yet.
5000 rpm max right now
Doing about 60 ish.
Stock LS6 '04' cam
1.75 rockers
Edelbrock single plane
Holley 750
Open wet exhaust, no baffles
Here is where I'm at:
Berkeley E pump don't know impeller yet.
5000 rpm max right now
Doing about 60 ish.
Stock LS6 '04' cam
1.75 rockers
Edelbrock single plane
Holley 750
Open wet exhaust, no baffles
Well i rev my ls1 to 7000rpm. They like rpm which means you could always push the engine a little higher to get a little more speed from your current impeller setup right? I have no boating experience at all.
The single plane victor jr is a good intake above 3000rpm. The LS6 cam is not a good match for that intake. Since you are running open exhaust i wouldnt think you would need a whole lot of exhaust duration. The 1.75 rockers give you some extra lift so the cam would need to be ground on like XER lobes or something im assuming.
I would 'guess' a cam around 230/230 on XERs with a 106-108 ls1 which would add a good bit of duration and lift from the LS6 cam, and the narrower LS1 would bring the power band down alot like say start around 2000-2500rpm and pull to around 5500-6000
The single plane victor jr is a good intake above 3000rpm. The LS6 cam is not a good match for that intake. Since you are running open exhaust i wouldnt think you would need a whole lot of exhaust duration. The 1.75 rockers give you some extra lift so the cam would need to be ground on like XER lobes or something im assuming.
I would 'guess' a cam around 230/230 on XERs with a 106-108 ls1 which would add a good bit of duration and lift from the LS6 cam, and the narrower LS1 would bring the power band down alot like say start around 2000-2500rpm and pull to around 5500-6000
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Haha well there arent too many people running tighter than a 110 lsa. I am not sure how well the cam suggested would work but im going by what i know of cams. Full cam specs would be something like 230/230 .620/.620 (with your 1.75 rockers) on a 108LSA+0
You could just PM " Predator Z" and he will spec you a cam for free.
You could just PM " Predator Z" and he will spec you a cam for free.
Ive been wanting to swap a LQ4 / LQ9 into my jet boat since ive owned it! I have 460 Ford in it now....the boat will pull 58mph with 4 people, which isnt bad considering its a 22.5 foot "mini day cruiser" style hull..which is bigger than your average 17-19ft typical river jet boat. Seems to me it would be pretty simple, just make some water pump block off plates with hose barb connections, fab up some side mounts, and (in my case) a bell housing adaptor and crank flange adaptor / spacer so i can retain my current ford pattern bell housing and pump. Starter will bolt to the motor like stock. As far as 02 sensors go, tapping the manifolds close to the cylinders, before the water jackets seems to be the best choice, if possible. It would be nice to run the motor in closed loop, with MAF sensor and all (will compensate for drastic altitude changes and conditions better than a SD tune). Im sure a good SD tune would work perfect though also. Running it in open loop dose'nt look so attractive, at that point I would just slap a carb intake on it and a MSD ignition. My boat has a "A" impeller, which should match the motor's torque curve nicely. ULTRA boats uses a marinized 6.0 LQ4 in their STEALTH line of jet boats they currently sell, and they use a "A" impeller with thier package
The sbc bellhousing bolts right up to the gen III. The power take off which adapts the driveline to the crank has to be modified. The holes don't line up. Also the bolts that come with it don't fit the ls crank and the arp bolts aren't long enough to fit the power take off. So I had thoughs custom made back east. Like I said I could go all day on what I have had to do. But I wouldn't change it for nothing.
The sbc bellhousing bolts right up to the gen III. The power take off which adapts the driveline to the crank has to be modified. The holes don't line up. Also the bolts that come with it don't fit the ls crank and the arp bolts aren't long enough to fit the power take off. So I had thoughs custom made back east. Like I said I could go all day on what I have had to do. But I wouldn't change it for nothing.
Nope. Topped it with a carb. Check out my garage. I got pics in it. Another reason I went this way. I don't wanna have to break out a laptop at the river. I'm on vacation. It's the msd/edelbrock conversion. It uses curve pills.
Ive used the carb kit with the MSD on a couple motors, works pretty well. Seems most motors will make 20 more HP with the Vic JR and a carb over the injected intake, even the LS6 and FAST. Definetly the easiest way to go, I just think it would be nice to get the fuel injection dialed in. Once you set it up right, its usually turn key forever ( USUALLY ! ) OF course if it submarines or sinks....good luck bringing the computer back to life! lol
Joined: Sep 2004
Posts: 3,148
Likes: 12
From: Downers Grove, IL
Moneyshott: Are those LSx specific exhaust manifolds or? I have been wanting to do a marine swap, but the exhaust has been slowing me down, I have only seen a few companies that make LSx exhaust and they are $$$$.
They are gen III. They are made by a company in Australia, Rolco is the name. They only bad thing is they don't have reps over here yet. So the shipping was about as much as the parts. I have about 1200 in my simple set up, and I did the bends. They make a whole convertion kit for the gen III. I personally think that these loggs wouldn't handle real big power. If your gonna go wild in the motor, go with a indmar exhaust(if the basterds will sell ya one, they wouldn't to me), or talk to Paul over at bassett headers he said he could do up a set of twisties.