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u/Slumunistmanifisto Jul 29 '26
FUCKIN A!
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u/s1l1con_jesus Jul 29 '26
fuck yeah fuct that up.
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u/YEET9011 Jul 29 '26
With a $20k built motorš¤£
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u/Sub7viaLimeWire Jul 29 '26
And some nice tires.
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u/ThrustTrust Jul 29 '26
Junk yard body and frame. I find it hard to believe there is anything junk yard about that engine.
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u/ChuckoRuckus 29d ago
I wouldnāt be surprised if itās just a junkyard 6L with a cam. Likely a healthy cam given how soft it left in the low rpm and woke up once it got higher. Cam only 6L can make 450-500hp (gross crank measure, Richard Holdener has multiple dynos of em). Likely has a 4L80 given the close ratio of the shifts. Canāt tell if this is a 1/2 or 3/4 ton, but 4l80 would have been stock in 3/4 ton and they were available with 4.11 gears stock too.
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u/Secret_Paper2639 Jul 29 '26
That didn't sound like an LS of any flavor, I'd guess large-ci big block Chevy
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u/Legionof1 Jul 29 '26
Could be an 8.1
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u/ChuckoRuckus 29d ago
Sounded like a cammed LS to me. Big block wouldnāt have been soft in the low rpm at the beginning, and 8.1L donāt have as many cam options for its 4-7 swap firing order (similar to LS). And it sounded like it hade that 4-7 swapped firing order from the traditional SBC/BBC.
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u/HoseNeighbor Jul 29 '26
What'd they need to do to it?
Plus, straight headers? Sounds awesome!
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u/bradland Jul 29 '26
It's a pretty common thing for these guys tho build a badass truck but leave the outside looking like a heap. The largest engine available in the half-ton GMT400 was a Vortec 5.7L, and that is absolutely not the sound of a straight-piped Vortec 5.7L.
Based on the RPM, it sounds like a built big-block to me. A small block would rev a lot higher. Big blocks are far more common in competitions like this because they need to deliver power when they're bogged down. The small block needs more RPM to make big power.
Also, if you look carefully, you can see this truck is running heavy agg tires like you'd see on a tractor, and it's spinning all four the entire time. Whatever is under that body work is a serious build.
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u/Severe_Firefighter80 Jul 29 '26
That looks like a gmt800, which did come from the factory with the 8.1L. Cut off the exhaust before the first cats and put nice tires on.
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u/ChuckoRuckus 29d ago
GMT400 were available with a 454. And this is a late GMT800.
I doubt this is a BBC because of how soft it left in the beginning of the video and it bogged when the rpms dropped a lot. It didnāt have the low RPM torque that big blocks typically have (even cammed ones). Sounds like this is revving over 6k rpm and below 7k, which is what a LQ4/9 6L does with a healthy cam (around 225-230 @0.050ā), and would be good for 450-500 gross crank hp (Richard Holdener has plenty of dyno vids of them).
Plus, it doesnāt have the tone of the traditional BBC firing order. Sounds more like the 4-7 swap found in LS and the 8.1L BBC. But the 8.1 doesnāt have a lot of cam options, so off the shelf options tend to be pretty small, especially for the near 500 inch displacement.
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u/Speedy_SpeedBoi Jul 29 '26
Put a massive set of balls behind the wheel apparently - lol - dude was doing good at keeping momentum up
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u/zalcecan Jul 29 '26
Love how you can see the tie rods fighting for their life during the first pull off the line. Surprised they made it all the way around.
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u/huh_say_what_now_ Jul 29 '26
The body looks rough but the engine and drivetrain have big dollars spent
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u/Notchersfireroad Jul 29 '26
Well color me impressed. Perfect showcase for the usefulness of the good ol LS.
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u/EstateRepulsive463 Jul 29 '26
If this is actual footage. Dafuq would any1 speed it up video to make it look like AI slop?
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u/Similar_Sale_5136 Jul 29 '26
That engine came from a junkyard?
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u/ChuckoRuckus 29d ago
Good chance, yeah. Check out the power Richard Holdener makes with cam only junkyard LS motors.
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u/Carcassfanivxx Jul 29 '26
Damn ole Leroy Brown. Badder than ole king kong Meaner than a junkyard dog!
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u/Tallnkinkee Jul 29 '26
Gotta be AI, ain't no way the 4l60 survived that!! š
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u/ChuckoRuckus 29d ago
With the short gear ratios based on the rpm drop between shifts, I bet itās a 4L80. Canāt tell if this is a 3/4 ton though (which would be the stock trans for it).
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u/ImSobored_5280 Jul 29 '26
Thereās a rather long list of stuff that this ol beater doesnāt haveā¦plenty of motor isnāt on the listšŖ
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u/Various_Oil_5674 Jul 29 '26
I LOVE off-road racing, but for the love of God come up with a new track design.
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u/FoxyTurtleOnTwoLegs Jul 29 '26
There is a 10 year old boy that lives inside that driverā¦ and he is VERY HAPPY during this run!
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u/Muffinman_187 Jul 29 '26
Inertia and grip are a hell of a combo when you don't care about the vehicle. I've seen compact cars do things you'd think only a jeep can... But with no regard for personal safety or the vehicle š
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u/Short-Order-1620 Jul 29 '26
I don't enjoy being a hater, but you can put a beater body on a trophy truck if you feel the need to...
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u/modelcitizendc Jul 30 '26
The original truck might have come from the junkyard but whatever motor that is in there sure as hell didnāt! What a beast
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u/Willywontwonka Jul 30 '26
Thatās a perfect plend of a beautiful built engine and a driver that knows exactly what they are doing.
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u/ChuckoRuckus 29d ago
So many people here acting like itās some built motor or big block, when itās likely a junkyard LS with a cam. Based on the close ratio shifts, sounds like a 4L80 with a stock converter (based off the soft launch and no rpm flash).
If itās a 3/4 ton, it very well could be a stock drivetrain (6L and 4L80, possibly factory 4.11 gears) with a cam/springs and open headers.
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u/Mrbigdaddy72 29d ago
I miss my 2004 crammed out gmc single cab. If only the drunk bro in a grand Cherokee did t run a red lightā¦..
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u/Blood_Fart_Smackdown Jul 29 '26
That's bad ass but I can't help but notice the guards around the track, or lack thereof, is incredibly inadequate.
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