Assembled short-blocks will be provided in the LS Shootout, but the providers were not named in the initial rules package.
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Aside from the expected high-powered numbers in the Big-block Shootout, the two classes that are likely to draw the most attention and could be the most interesting are the LS Shootout and the Vintage Engine category. The LS Shootout will require teams to use a spec short-block supplied by the competition. The rules package did not indicate the source of the short-block but the displacement is 6. The block, crank, rods, pistons, rings, bearings and lubrication will be provided. Teams will bring their own camshaft, cam drive, cylinder heads and intake manifold but engines are limited to hydraulic lifters.
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Teams will also bring their own headers but a full exhaust system with spec mufflers will be hooked up on the dyno. X- or H-pipes are not allowed.
Pontiac engines will be welcomed in both the small- and big-block competitions. All parts that the teams bring to the shootout must be commercially available, but the cylinder heads can be ported. Welding or any other form of adding material is prohibited, and the heads must be fitted with stainless-steel valves. EFI and coil-on-plug are the only permissible fuel delivery and spark.
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It will be interesting to see how the teams dial in the optimum torque for that RPM range. But the potential for exciting duels on the dyno is there. Unfortunately, there is already considerable discourse in the comment section for the Hot Rod announcement about the ban on Ford Mod motors. This is one issue that likely will not go away, and Engine Masters officials will be hard pressed to allow the Ford engines a shot at competing against other brands in the future.
Entertaining competition. Big-blocks close out the show and will make the loudest noise on the dyno.
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Day 4 will arguably provide the most entertainment with a host of different vintage engines eligible for the competition. With all the aftermarket gear available for the Ford Flathead, that iconic V8 could be a worthy foe. This class will be tested from 3, rpm to 6, rpm and there are very few limits on carburetion, fuel injection and parts selection—but again, everything must commercially available.
Even the compression ratio is unlimited, so this class certainly will be the most colorful. The small-block competition on Day 2 will have a number of parts restrictions in place. Only specific heads and intake manifolds from Edelbrock are permitted, although they can modified within certain limits, and there are spec ignitions required from MSD. The obvious equalizer in this competition is the bore-stroke limitation.
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Engine builders are basically working with a square 4. The other equalizers are restriction to OEM blocks and a single carburetor. Only Edelbrock cylinder heads will be legal in the Small-block challenge, such as these Ford and Chevy units. Specific part numbers are available in the rule package. Wondering if any original Hemi engines will be entered in the Hemi Generational challenge? The class with the most mystery will be the Hemi Generational shootout.
This will be a tough class to handicap, as the big traditional Hemis will make power but will have to have the displacement factored into the final score. The Blue Fin is a design that we've not really seen here on the forum before and I'd sure like to follow your build. Here is the article I was talking about. Being able to run a performance motor on cheap swill is a real advantage. If you've been dreaming about building an inboard powered boat but are intimidated by the rebuild and installation process, this article may answer a few of your questions such as ' where do I start ' and ' what are my options '.
Here is another one though it uses a higher cr than 87 octane would generally support. Possibly though, as Denon pointed out in his Rampage update thread, the typically cooler engine temps an inboard sees verses a street engine might allow higher cr with lower grade fuel than you could get away with normally.
Tuning will play a factor as well i suspect. You do not have the required permissions to view the files attached to this post. I am not sure what are the main differences between how an engine should be built for automotive use compared to one built for marine service. I am thinking for marine use we would want to maximize torque in balance with horsepower at a lower RPM range and not use components that would benefit higher RPM performance that the engine will not see in marine use while sacrificing durability and lower RPM performance.
To answer BayouBengal's suggestion for providing more information on my BlueFin build, I am planning on flipping the hull this fall and at that time I think I will make a thread on my build using information I have in some of my previous separate posts from various questions and concerns I ran into during the build.
I plan to get some pictures of the build after the flip. I have found it difficult to get good pictures in the past as I only have about a 3 foot perimeter around the hull in my work area, I cannot get far enough away to get much overall detail into the picture as every picture I take looks like a closeup of a small area. I have the hull on a raised building form on wheels which makes the top of the hull 5 feet from the garage floor which limits how high above the hull I can position the camera.
Every marine version engine I looked at was designed for higher torque.
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Horsepower is a function of torque times rpm. You can have two versions of say a hp 5. Both develop the same hp but do so at different rpm ranges. Boats tend to want torque more than rpm, unless it's a racing version. Thought it funny that Ford used a marine 5. Last edited by PeterG on Sun Jul 23, pm, edited 1 time in total.
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I gotta throw something in on this! First one is a bit unorthodox, but it IS an inboard It's the engine for my jet TNT. Not really a build persay but I will be tearing it down to put stouter springs and retainers in it and possibly port the head along with intake and exhaust manifolds if it looks like it would be worth the time to do. And yes, I am a big fan of the REV I recommend the former, or I'll get us to page 30 while I get mine built In other words, I feel like the best plan is for instance for me to start my own thread on my build, then when it's done, summarize and reference it here.