This man is a genius when it comes to high horsepower engines

5 mins full boost! Shoot, many street cars will blow up after 1 minute full boost 🤣. Great work!!

Tom is a true Rock Star ! It’s guys like him that Tirelessly Work to advance innovation!!!

tom nelson - "air is not a good lubricant" air hockey table - "am i a joke to you?"

I'm blown away by this little monster. Out of all the motors you've built I think this is your master piece.

I wish you could be the engine builder for all GM applications

That's impressive you are doing pretty good if you can make 1200 hp for like 8 seconds and they are doing it for 5 min at a time

10/10 on engineering and design. Great work brother.

And why would anyone skip 5 minutes of WOT ? Damn son!!!

It was a real treat for me to see the MASTER at work. I certainly learned so much. THANK YOU.

This was freaking amazing wow wide-open for the period of time with loads on it and it looked ... just wow!

You're my hero man. I thought of mirror image turbos as far back as the early 90s, but it was way over my head to pursue it, yet you made them happen. I O-ringed a fist gen Chevy smblk and had to scrap it because I couldn't get the heads to seal, but you're making that work with that killer block you got. I even used a kit by Bo Laws here in Orlando to add wrist-pin oilers because I've built an electrically-driven Novi-2000 centrifugal to boost mine with and here you've come up with your own wrist pin oilers too. Way cool man. I love the way you just engineer to get what you want and that you have the means to get it done. To me, that's what it's all about. Those pistons and dry-sump are awesome. The only thing I'd try to do in addition is electrically drive and interlock it all which I know is a bit out of your field, but I'm sure it could be done. I'm big into PM DC and BLDC motors for that kind of thing. Save all the hp for the main-drive is my motto. Belts are a bummer. Anyway kudos on all you've done man because I really do think you do some outstanding work. I hope you never stop.

We once destroked a 2.3 ford 4 banger to 1.8. Turned 13,000 rpm and 400 H.P. This was in a Mini Modified car at New Smyrna Speedway back in the 90's. Ran 9 nights strait during speedweek. This reminds me of those old days. Thanks!

Taking some notes on Gas turbine engines lube systems even the lock wire. Love the engineering on that beast. The added thickness piston tops , huge pins and trick oil let’s for the bottom of the pistons . 100% great engineering!

Fantastic job Tom. Now this is the kind of video I want to see.

This team has put a lot of thought and skill into building that engine. My hats off to them.

The craftsmanship that went into building the motor is top notch.

This is what I call a true work of art!

PURE GENIUS SIR...THAT LITTLE GIANT OTTER REALLY SPIN!!!!!!!(I had to add a water critter...)

awesome work tom, i just recently specced a 292 ci like this last month. glad to see a 262 .

My lawnmower runs full throttle each time i use it so that means my lawnmower engine is like that nelson engine. Just kidding that was actually very impressive to say the least 👍

Awesome Im a diesel mechanic of 30yrs nice to see you guys employing some old school diesel tech You can push those pistons alot harder once you stabilize their temp with oil Maybe compound turbos next And multiple direct injection events per combustion cycle

Nelson should build the new C8 engine.

Seems like that setup would be ideal for all kinds of endurance and other tortuous applications. Pretty dang cool!

Love the way your brain thinks brother God bless

Sure is nice to see a true professional. Meticulous. God bless

That oil separator pump is something sweet. I even want one in my daily driver, let alone in my race motors !

Im a LS fan but also a Chrysler fan. Lots of people shun the 287ci (4.7 HO). I'd love to see you put together a 4.7HO. Nobody is building 4.7s. If i had the resources id be all over it no doubt. Seeing a small block rip like this is too me, more thrilling than say a 632ci.

He’s an engineer genius

Now theres a ringtone to wake up to.

You Guys are building some nice car and motor and it is built to last.Congratulations.You guys are thinking before starting any project.

Awesome job! However, that plastic bag on the floor of the dyno room bugged the heck outta me. Thankfully whatever was in it was heavy enough to keep it from flying through the air. All I could imagine was it getting sucked into one of the turbos! LOL

MECHANICAL PERFECTION 👍🔧🏁

Going fast cost alot, i use to work at a machine shop. Some of the tricks here we use to use at our shop. We used tungsten wire back in the days instead of piano wire. I like the dry sump set up. It will be a good upgrade than the conventional one.

Reminds me of when i was a kid in the 70's. My dad had a friend that ran NHRA prostock and my dad helped him out from time to time. Back then, there were not a lot of go-fast catelog parts. You had to make everything. My dad and he were aircraftmachinists. As i recall, they ran a 327 small block stroked way down...i have no idea - 260 or 270 something ci. Concreted heads, o-ringed deck, rocker and crank stud girdles. Dry sump pump. This application was all about high RPM horsepower. Had to run a magneto for the high revs. He ran it through a race prepped powerglide and outback was some outlandishly low geared rear-end. One shift at the 1/8 mile mark and it was RPMs to the 1/4 mile mark. Not sure where the RPMs capped-out at but dad said it was in the high 4 digit numbers. I was a boy then so i don't have real numbers. What i do remember was the freaking huge tunnel ram and header pipes the size of tennis balls. They were moving some serious air. So old school.

My diesel has piston cooling jets.Good thinkin.

This should put the car engine in boat myth to rest once and for all!!! Hell yeah!!! Love it...I have to edit...I am amazed at the engineering behind this engine...Holy Sh*t...Awesome

Cooling oil jets is the key , I did it on my tt viper engine designed for circuit racing .

Cooling the piston down that way is ingenious!

I want to hang out with Mr. Nelson and absorb some of his engine building knowledge lol

phenomenal ! although it is an older vid, would love to know how the boat and engine combination did. anyone know ?

Simply impressive and genius!!!!!

394th 👍's up Tom thanks for taking the time for us

what a beast engine.

4.2L LS v8 BEAST

that endurance speaks volumes

In my opinion you can go to school and read a 1000 books but if you don't add pages to those books or invent something from the base knowledge that you gain from those books you're a thief. and you sir have given back with the knowledge that you have taken from books and experience you are a king a creator you have creativity flowing through your brain it's awesome keep up the good work intricate thinking good. meditate become more.

Way back when, guys used to run the 283 because of the crank pin overlap between the main and rods. The other thing is that they had small journals, which allowed for more meat around the bolts and thicker walls on the mains when compared to a four bolt block. The distance between the outside edge of the main cap and the inside of the main journal is thicker than a four bolt 350 block, which gave it more strange hope. The rod ratio was better, the Pistons were lighter and all that added up to a motor that would rev like crazy, and make killer horsepower.

Nice vid.

What is the size at the camshaft how lift intake & excaust ??????pleace❓❗

What I would like to see is this engine in one of those wind tunnel things where they test aerodynamics were they put smoke and see how this engines sucks in air.

A lot of these things can be implemented on other engines too, not just the LS, or a Chevy for that matter, Ford and Dodge, and imports, of all sizes and types could use some or all these tricks. I've also seen a few tricks import guys use like coatings that we V8 guys could use, we don't need oil sicking to the side of a block where we don't need oil to lube or cool down...

Why does it have water jacketed exhaust? Was the displacement chosen for rules purposes or to get a stronger crank and less piston side load? Thanks for sharing some of the build details!

Junkyard 4.8 LS 898 HP at rear wheels on 15lbs boost made over 1100 at 22lbs , was done on car build off show.

I love this guy he is a FUCKING MAD SCIENTIST!! I wish I had the coin to have Mr. Nelson build an engine for me. Someday Ill have the jack it takes and Ill be knocking on his door!!

Giving me ideas for my f223 formula thunderbird. Great vid BJT & NRE.

Um...this is serious thermodynamics here. This guy deserves a Nobel Prize. He's getting 4.6 horsepower out of a single cubic inch of volume. Imagine a cube, one inch on a side (like one quarter the size of a Rubik's Cube ) producing 4.6 horsepower. That's almost like Star Trek stuff.

Not to shabby, see a lot of the same techniques that I use on my builds on this engine. That was a hell of a torture test though. I've never used that kind of exhaust valve though I would be concerned about that friction weld not being bonded correctly and dropping the head of the valve in.

I'm guessing most people don't know the advantage of a high rod to stroke ratio. Smokey Yunick did...

You guys have this sorted.... I'm a Welder , I know Inconel....

Im toyota guy but i got a soft spot. For the ls engine even early version of this engune did suffer froms spun rods but this engine is great once you put custom engineers part like tbick piston rods thicker piston crown better oil squirt

lol at the bag and aerosol can just coming into the picture 13:40

Damn that’s painful to watch ,but excellent proof of concepts . I say concepts because of the innovations and quality of the parts and knowledge built into this engine . Gr8 job.

I want one for my 06 GTO!

This is amazing

Do you have a part number for the crankshaft so I can order one I want to try that same crank with a 3.9 inch bore for road racing

That is so awesome 👍👍👍👍👍

Sick video! Been a long time you guys made a video. Your 2000s videos are still up there. I must ask why is it surging? It is that you whaling on it? I think it's time you put aeronautical air inlet Deming on into consideration. It would benefit a lot. Lastly look at you footage again the air ram was expanding .Iggy need something more ridged. Keep wrenching and making bad ass engines.

The replacement for displacement is boost

Dope as hell

what are you using for head gaskets tom?

If I remember correctly Allis Chalmers produced a V-8 diesel heavy haul truck engine that tore up their competition but they self destructed because they foamed their oil. Your idea to de-aerate the oil in your dry sump system is a very wise decision and I’m sure that there were some engineers at AC that wished that they had done so.

This Engine Is So Super Dope tho!!!! CAN I GET A WITNESS!!!???!!!???

amazing tom

What was the bore size, I apparently missed it. Also, can you also get me speeling on those exhaust valves

Awesome, I always said, it you want it stronger make it thicker! Mechanic 35 years....

The sound was fucking hypnotic!!!

WOW! Can I borrow the motor this weekend?? Would ceramic coating the Pistons also keep it kooler on top too? The oil galley jets are they free floating or welded in some how... Also, I seen we're going with the lsx cast iron block. A great block..but what if on a aluminum block application? 🤔

Nice build but I would use king racing bearings they look like the day you put them in after years of racing.. just a tip from alot of experience.

Does anyone know what a build like this costs? Scroll to 15:20 for end results? Listening to this thing is sick! I wouldn’t want to miss it.

Looks like you guys have som ”overload” on your sparwires at high revs! You can see that there the wires are joining above the intake. Cool build though! Tough little eng to withstand 7000+rpm for 5min!👍

Love it

How did it do in the race?

wow awsome

What kind of boost pressures does it take to make this kind of hp/ci?

I wish I could get my car sponsored!!!

I know what build I'm going with for my 1972 Buick centurion convertible now🤭🔥🔥

What did u run for motor oil?

How many lbs of boost? Simply amazing to say the least!!

Never seen aluminum pistons glow red. But I understand what he was trying to explain

Great motor Tom! How did the boat season go? Or did they get cancelled by the flu?

the old saying was, "there's no substitute for cubic inches" except when boosted to hell? Lol shit my little (250cid) 4Ltr quad cam quad valve v8 spins over 9600 on 30+psi an its real nice seeing someone else prove the point too

Awesome

Helped me

Imagine this in a street car? 4.2L, no one would suspect that power. lol. I vote for a Miata Swap. 😂

How did this setup hold up?

not one time did it float valves wow!!

Good Lord! #awesome

Head spec?

I realize in an application like this/ marine your gonna want to tune AFR to keep the EGT's under a certain number (looks like 1400 F). Im wondering what AFR it took to keep your EGT's under that number.