SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: bjaming on August 15, 2012, 06:14:28 PM
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I want be build a stroker for my youngblood, tell me what things I should put in the motor to make it "bullet proof*"
I want to make this motor as dependable* as possibile, I've seen some online for around 15-20k that put out that sort of power, but I want to know from you guys, what sorts of parts I should be looking for, what's the dream parts list to build the best motor ever? (in that hp range)
*-I know there is no such thing as bullet proof or dependable
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Build a Hemi >:D
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I'd say billet block to start, lunati crank, crower rods, arp bolt upgrades, JE pistons, RHS heads (if it's a chevy based motor), Mahle valves, Jesel shaft mount roller rockers, isky or clay smith cam, clay smith mechanical fuel pump, I'd go with a weiend intake and supercharger if you you want a blower motor or for a turbo motor I'd go with a dart intake dominator blow through carb and a single 101mm turbo. Ofcourse there are more parts than that but there is an idea lol.
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It’s not just what parts you buy, it also has a lot to do with how the engine is prepped and assembled. I have seen stock parts that are abused over and over last for seasons, and I have seen engines with the best parts die within a few minutes.
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I agree, but if you ask for dream builder instead of just dream parts list it could get very interesting. But this is very true, if it is assembled poorly it is bound to fail.
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"bulletproof" is just an imaginary word in engine building. its a all in the prep work. and it must be CLEAN . take your time. do it right and have fun. thats what its all about.
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Let’s narrow this down a bit. Realistically, how much do you want to spend? There are a lot of ways to make that amount of HP, it depends on how you want to go about it. Do you want to use a power adder or do you want to use cubic inches? Do you want to run race gas or pump? Is your jet up to this?
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I'd like to run on pump if at all possible, and realistically I've seen motors for ~15-20 that produce that level of horsepower, and yeah I know it's all about the assembly. I wouldn't be doing that myself, I'm not that handy with a wrench and would HATE to do something wrong and flush that much money down the toilet.
As far as the pump, yeah I'd need to put a scoop on it, but the internals should be good to go. Maybe change the impeller...yeah that too.
Btw, I'm thinking like a 572 or something, stroker/rat motor for it. Should be a ton of fun once it's all together.
Thanks for the input so far
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the youtube video on this site gives me a boner
http://www.proformanceunlimited.com/specs/572_750.html (http://www.proformanceunlimited.com/specs/572_750.html)
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8) build an LS2 with some good heads, like L92s stroke it to 402,put a mild cam, (228-232) run corvette belt system and put an A&A supercharger system on it. We make on a stock LS2 with a cam sometimes in the 550-600 rwhp. So on a 402 we see 650-700rwhp. Or get the big boy swim gear on and step up to an YSi blower for 700+..
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I have heard the LS motors don't put out enough torque to really be good in a marine application. Is that not true?
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the youtube video on this site gives me a boner
http://www.proformanceunlimited.com/specs/572_750.html (http://www.proformanceunlimited.com/specs/572_750.html)
All I kept thinking is STFU and start the damn thing already. :beer:
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All I kept thinking is STFU and start the damn thing already. :beer:
And then I thought who the hell revs a non load engine to 6k? :banghead:
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572/750hp you can get 750 hp out of a 496 stroker. i believe a 572 block alone is 13 to 15 k. also i thought you had the green yellow red gullwing? did you paint it blue and white?
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high horse power, dependabilty, low cost. you get your choice of two, and only two. they don't make one with all three options
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Na, LS motors make low end torque, you have to look at the weight savings i think. What dose a stock jet boat 454 make for power and tq?. i checked a 1974 454 for a jet boat made around 290hp 410tq, and some made 320hp 430tq. But at what weight? An 2003 SS truck 6.0 made 345hp 380tq, now that doesn't sound like a lot, but i put a BBC head on the scale and its about 73-76 lbs, an LS head is 34 lbs. So both heads and intake of the LS is about the same weight as the BBC head. So ...Less weight...Less weight to push in the water I would think ( Now I'm still new to the jet boat world but been a car and motor guy for a long time) you wouldn't need MORE torque with less weight. So I have seen and a pull out motor from an SS truck go for 1200$ with harness and computer, get some log manifolds $700+, if you pull an Chevy out you should be good for the mounts some changing but there not too different on the sides of the blocks but people have done it. Stick a 224-228 114LSA cam and comp 918 springs in and that 345hp is bumped to 385-390 and tq stays, (we seen it on the dyno, a truck we did made 330hp 320tq at the tire). With the fuel injection it wont have a BBC apatite for gas. And if you wanted to BOOST it you can bolt on a 200cid Whipple for your low end, out of the hole power.. thats just my two pennies, when my BBF dies I have a 6.0 i getting ready. :beer:
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I just watched the 572BBC with that 1050cfm carb, wow 750 at the motor , LS 6.0 with an 2300 lyshlom will make that all day and pass by the boat gas pumps were that 572 has to gas up evey hour..... :o :banghead: and you would have money left over to get a good tow rope to pull that Big Block back when it Shits from running at 7000rpm
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Start looking for a 10-71 and some aluminum heads. AS a rule the bigger and badder the shorter the life span
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I just watched the 572BBC with that 1050cfm carb, wow 750 at the motor , LS 6.0 with an 2300 lyshlom will make that all day and pass by the boat gas pumps were that 572 has to gas up evey hour..... :o :banghead: and you would have money left over to get a good tow rope to pull that Big Block back when it Shits from running at 7000rpm
Before I start an argument I would like to say I think the LS engines are awesome and there is a lot of potential from them, but I don’t think it is fair to compare a N/A BBC to a forced air LS. And that 572 is nothing to wright home about, there are guys pulling river duty with PUMP GAS 540’s making over 900hp with no power adder. As far as weight reduction anything you can do to reduce weight is good but what does an aluminum head BBC weigh, 600-650 lbs over a 450lb LS? I would gladly take the extra weight and extra cubes, over all the extra wiring if you’re using EFI on a LS. But like you said yes the BBC will drink the fuel …