World's Largest 527 cid LS1 Engine

The latest featured engine is this 527 cid LS1 built by Erik Koenig of HorsePower Research in McKinney, TX. Used for race engines, endurance engines, drag engines, and for street cars, this is the world's largest LS1 engine!
Engine Builder: www.enginebuildermag.com
PennGrade: www.penngrade1.com

[@Bozemanjustin]

Whoa whoa whoa calm down buddy! You're at a nine we need you at a three

[@zAvAvAz]

awesome job

[@K-Effect]

That was the best picture of the intake you had? Other than that I bet this is an awesome motor, reliability street manners and 750 at the tire where do I sign

[@robertphillips3078]

Try Small Block Ford Hemi Heads out of Georgia. 928 hp & 674 tq from a 427 @7700 rpms .

[@michaellaughlin8457]

the cylinder walls must be as thin as paper 🤷‍♂️🤔👍

[@zaknefain100]

It's an RHS tall deck, 4.4" centers and I'm guessing, .200" web if they went to 4.2" bores with a 4.75" stroke. That's still plenty of web thickness for an NA block. Not that I'd want to build this large...

[@davidincognito7285]

Almost as thin as a factory cast 351c

[@kevinshasteen5682]

Would like to see more options on this engine; maybe a mild mannered street set up with the option for a lot of cam overlap version. Its a standard that off the shelf parts can put an American V8 at the 1.25 HP range. With so much custom work and $'s I was expecting more. Not knowing specific parameters, Im only guessing that the cam, cylinder heads, and intake are holding this thing back. Ild say if you're gonna spend the money this thing costs, forget Brodix and opt for some MBE heads and intake.., whats another 8k to the price ;), its only money

[@MasterKeyMagic]

how much does it weigh??

[@davidincognito7285]

Drop some cubes and spin it higher and itll make more power. Seems like a lot of hp is being left on the table in the name of cid.

[@TheRoguelement]

That's just nuts Pavtek has a Gen1 small.block out to 434 inches without spray No boost just N/A cranking out 750 HP all day long so I have to ask myself why would I ever want a 527 inch LS motor with relativily low HP when I can have a 540 inch BB cranking out 800 HP all day long for so many $$ cheaper ?? It's got to be more than the novelty of having a Big inch LS ...

[@ERidParasoth]

Pavteks motor makes 750HP at the crank. This motor makes 750 at the tire. There's a major difference here. www.enginebuildermag.com/2018/05/527-cid-ls1-engine/

[@sethh8892]

How much does that 540 big block weigh? I guarantee you this smaller footprint aluminum block weighs less. Not to mention crank horsepower vs. wheel horsepower are different. Just as the other dude pointed out.

[@effingwrecked1917]

But try boosting lets see which makes more power. 527 ftw.

[@brettrussell9643]

He did say 750 at the wheels, translates to over 1000 at the engine! Also low rev range, reliable horsepower and maintenance.

[@AB-80X]

@@sethh8892 Don't be so sure. I recently build a tall deck LS with a friend and that block was 119 lbs. It's no lighter than the block I have in my standard deck 583 build. The weight difference of an all alu tall deck LS vs. a standard deck all alu BBC is virtually nothing.

[@gunluvS14]

So this is still the GenIII LS architecture? what’s the deck height? I’m curious to see the bore and stroke figures

[@zaknefain100]

It's built on an RHS block... 9.75" deck height.

[@paulmoore6819]

4.185 bore 4.8 stroke

[@MasterKeyMagic]

Yes

[@independentassesor2630]

How Much?

[@iqinsanity]

It’s funny people think this is low hp, some people actually want street manors. High duration cams make awesome hp, and absolutely suck on the street.

[@sethh8892]

If you want a low horsepower Street motor than stick with smaller displacement... if you're going to try to turn out 500 plus cubic inches from a small block, there's no reason to push everything else to the limits... frankly I think he's still losing horsepower from the heads. The reason Big Blocks are able to turn out more Powers because they have more room in the heads for airflow.

[@55cleon]

INDEED 👌🏿!!

[@bethanyhaskiell9116]

@@sethh8892 Ive see cnc ported ls style heads that flow 450 cfm thats plenty of flow for this engine

[@AB-80X]

Low hp? Did you hear he said 750 whp? if that's behind an automatic and a proper rear end that can handle the power, that's well into the mid 900's.

[@AB-80X]

@@bethanyhaskiell9116 At what lift an where? CID out of Australia can't match that number and that's pretty much as good as it gets. Way too many ways to fiddle the flow numbers. Some of the extreme race heads go into the 440-450 range, but not a 12 degree LS7, and most certainly not a 15 degree LS3 or LS1.

[@Obshowersyndicate]

This dude should stop being so excited

[@jaybilis9723]

Those little boats that run in the canals?? I guess he is talking about jet sprint racing, maybe that's new to Americans, but that shit is totally awesome, doesn't deserve to be belittled like that .

[@GhostRider-dp2tc]

Do you need to go to a little boat race to take a shower 🤣

[@blixxy1320]

is that a wiseco sign? I thought they just made bike pistons

[@swappedoutZ71]

Nah they make way more bro. Wiseco is pretty huge name and well known in ALL areas of racing where there are piston in block design engines

[@nitrozack3062]

LOL

[@AB-80X]

Wiseco is big with the LS gang.

[@chrislothes2254]

Bet she’s heavy!

[@lockedinstreetracing6005]

That’s pretty awesome but I’ll stick with the 427S and 434 s myself.

[@studio571]

what makes this engine as ls1 ?

[@hamadalshaqsi2005]

I was thinking the same

[@Suaveat69]

@jdog942 rectangular heads

[@zachpayne3682]

5.7 l.....1999 and up....

[@ls1_cammeroh]

Guarantee it’s not a ls1 block ls3 maybe

[@kevinpickering3866]

@@ls1_cammeroh its not a real LS1 the block clearly says RHS and the displacement lets you know its a tall deck RHS block as its not possible to take any stock GM block anywhere near 500 cubes this is to me a dumb build. they did everything right just to restrict this beast with cathedral style heads (assuming thats why they call it and "LS1") instead of some way better flowing LS7 style heads... after looking clearly not cathedral heads so there is nothing LS1 about this engine just ClickBait

[@chesspiece81]

I honestly was expecting 1k horsepower. I have an 11.8 CR 416ci LS3 with a 240/250 .623 .617 114 and some WCCH Stage 2 LS3 heads and I wouldn't think it would be that far off. Super Chevy or one of the magazines built an engine the same size as mine with 10.8 or 11.1 compression, less duration and lift, and Scoggin Dickey heads that flowed a good bit less than mine and made 630 hp. I figure mine is probably in the 640-650 range and mine cost less than the heads and intake for this I bet. I realize this would make a boat load more HP and TQ than mine lower in the revs but not enough to justify the cost. I wonder why the power is so low.

[@GreatLakesLogger]

Wheel hp

[@baby-sharkgto4902]

But 650-720 whp is a lot more than 630 chp

[@chesspiece81]

@@baby-sharkgto4902 Obviously but doesn't this seem underpowered especially for the money

[@baby-sharkgto4902]

@@chesspiece81 in my opinion they make it all grey by not giving crankshaft horsepower numbers or a dyno graph. They also admit that they are quite limited by cylinder head, (for a 527 C.I. LS) which in your case kind of explains why this isn't the most horsepower per C.I. engine ever.

[@baby-sharkgto4902]

@@chesspiece81also, I agree not the most cost effective horsepower.... ironically the LS is the king of cost effective horsepower per dollar, just not these freak one off monster C.I. LS engines lol however I do not think they are claiming to be the cheapest, most powerful or even the realistic choice so I'm not offended

[@LSCBTHEWAVY]

Fellas that engine break u gon have to sleep in that car to fix it that thing ALL MOTOR

[@mrmeadowsiscool]

its crazy that we have much smaller NA motors making 840whp nowdays

[@55cleon]

This Is An Engine With A Hydraulic Roller, Pump Gas Friendly Street Engine. I'm Actually Surprised By The Stupid, Backhanded Remarks In The Comments SMDH.

[@AB-80X]

840 wheel N/A? So you're saying 1050 crank? Obviously that can be done with a 400-427, but it'll take a huge cam, big heads and 9500 or more rpm.

[@0351MC]

LS7 with Heads, cam , and bolt ons RPM Motorsports can get 665 whp. And ethanol.

[@2ndAmendProtector]

I had 1 of 11 436ci stroker engines built back in 2002 by ARE (Agostino Racing Engines) and with very bad flowing LS1 heads of the time and a ported LS6 intake and stock TB at 11.3:1 cr it made 530 RWHP. Idled close to stock, but yes, with a nice little lope. Thats a LOT of power for way back then. If Brodix, LS7 or MAST heads were available back then it would have easily made 630 RWHP. So that 527ci is actually pretty cheesy......not sure why its so low on power at 11.5:1 cr. Makes no sense. Alan Futral built 14.1 cr 427's that made 850 HP on the engine dyno....15 years ago. Yes, it was a big ass cam but they were sweet. NASTY as all hell in a street car. Its all in the builder.......Erik Koenig isn't doing something correctly.

[@dennisrobinson8008]

Cool history story

[@ForneyRider]

It’s a niche motor in its configuration. They can build horsepower with ls, but you don’t build 4 figure power with maxed out bore and stroke in these blocks. The really high horsepower ls motors are 400-440 ci.

[@sethh8892]

Prob running out of head flow. If you have lots of bore and stroke, but cant feed it, you wont make power.

[@michaelpearson8516]

I have a 87 442 im looking for big block v8 what would be the best

[@dashaunharrison1065]

This is just my opinion but either a Cadillac 472 cubic inch V8 or a Cadillac 500 V8

[@AB-80X]

BBC. Most parts, most power, cheapest.

[@Diesel257]

No bore x stroke? Weak sauce bro.

[@AB-80X]

I'm guessing a tall deck with Darton MID sleeves. 4.25 bore and 4.65 stroke.

[@thomasbailey9605]

shew......nothing personal against the host, but you need a diff guy doin it.

[@mohanperformance.enginerd.1308]

So agreed.

[@b.c6015]

Not worth 34k I could do a procharge 383 and walk off on it for way less

[@RedArrow73]

Mountain Motors.

[@3800TURBO]

I don't think Phonsy's GM motorsport is a division of GM Australia. 😂 He's a private operator. You're going to upset loads of LS fans calling an RHS block an LS1. 😆

[@EricFixalot]

There isn’t one LS1 part on that thing. LSx sure, ls1 ha no

[@stellingbanjodude]

Definitely not a stock block, it said RHS. Probably a 20-30k motor build

[@gangstarsnowman7773]

Wrist pins and valve retainers lol

[@driverjamescopeland]

This is NOT an "LS1". There's nothing specific to the LS1 about it.

[@lagosduarte]

thats not ls1 block

[@JohnMiller-ee9pn]

I'll stick with the big block Chevy

[@effingwrecked1917]

Nah LS ftw!

[@mynameis63]

@@effingwrecked1917 I reckon johnny loves the BBC

[@AB-80X]

@@effingwrecked1917 Give it a rest LS boy. The LS is great, I have built a few, but if you think there's any way in hell that a built LS will outperform a built BBC, you are so far off it's not even funny. And don't say just add boost. Because if you add boost to a well built BBC, you can make 3500. It's simply physics. A BBC has bigger heads and have much more displacement. That's just the reality of it, and you can stick a much beefier rotating assembly in the BBC.

[@effingwrecked1917]

@@AB-80X But you dont need all that power for the street anyways. Unless you in the NHRA or you doing “street outlaw” type of deal. A LS is good enough. Saves money and headache.

[@effingwrecked1917]

@@AB-80X LS are underdogs compare to the big block anyways. So LS Holds it down.

[@natelsx]

Disappointing. You can make a stock LS7 short block with heads/cam/intake put out more than that.

[@piercesgmc9112]

This makes 800 horse to the crank. Show me and ls7 that does that on pump gas, please

[@AB-80X]

@@piercesgmc9112 It makes a hell of a lot more than 800. He said 750 wheels with a good intake. If that's in front of an automatic with a good rear end, that thing is in the 940-950's. An honest 700 to the wheels in the same case is about 875 crank. Not saying it can't be done, but it'll be raunchy. If that is 875 on pump, the combo will look something like this. CID LS7 heads with 289/106 cc ports and 2.250/1.610 valves. Mast single plane intake or similar. 268/284-114+3-774/756 solid roller cam. Yep, cheap and very street friendly - not...

[@AB-80X]

Lol, you LS fanboys who think a stock LS7 can make anything with a few bolt-on's are funny. Have you even ever built an LS?

[@natelsx]

@@AB-80X lol you dumbasses. Who hasn't built a LS1. And ls7s are very impressive and easy to make power. You just made your self look stupid by your obvious lack of knowledge

[@joshcarman2664]

Damn man if you like your business you would f find someone else to host your show

[@user-zd9ex2bn7q]

A bbc same ci outrun crap put of it😊

[@arthurkohler2497]

So anyone else wanna know what this thing can do on 30psi lol

[@rangerst_870]

2200+ if the block can hold up

[@ianb3866]

@@rangerst_870 never ls1 shouldnt be bored larger than a 396 anyways itll fuck up the cylinder walls. not sure how long this 527 will last

[@AB-80X]

@@rangerst_870 Block? Screw the block. If you feed that thing 30 psi and it goes to 2200, the crank will grenade on you very quickly - even if it has Cleveland mains and 2.200 rod journals. There has to be zero strength between the main journals and rod journals on that crank.

[@kenmumford5583]

I'd be embrasassed so little hp for the cubes build better engines here in australia.

[@jrburger95]

Leave it to the yanks to get the smallest amount of HP out of the largest displacement engines.

[@derekbigpowers1993]

Leave it to the aussies to get their guns confiscated and Holden shut down, mate.

[@AB-80X]

Yeah. 950 hp is nothing... What do you run that makes that N/A?

[@RedArrow73]

Too bad it's not a W.

[@randallcribb668]

If your engine is about horse power , not very impressive.

[@donaldpfau4284]

Bullcrap. That's not a Chevy small block. Not 1 Chevy part.

[@natelsx]

Yes you are correct. But they never called it a SBC.

[@AB-80X]

An LS IS the Chevy small block. It's LS architecture so it's a Gen III/IV small block Chevy. Who cares what it says on the tin. My 583 is a BBC as well.

[@GhostRider-dp2tc]

You got alot to learn dumb ass..

[@littledeel]

... ok so... let me get this straight. My 12.1-1 ls2 that’s 440ci on 110 octane that’s NA makes more than this? I bet this motors 40 grand too. Waste!

[@Suaveat69]

your LS2 makes 850 crank HP. That pretty impressive. Mind sharing build details.

[@baby-sharkgto4902]

Dang. A 900hp LS2 is the highest I have heard of. Did you build that yourself?

[@littledeel]

@@Suaveat69 yeah sorry for such a late reply, my motor was 441 in.³ and I made a typo. It was an LS7 not an LS two and it made 733 hp at the wheels in a C6 Z06 Corvette. A LOT of 430-460ci ls motors make that on e85 but where I am I don’t have any e85 so I decided to go 110 and throw a crap load of timing at it. I had about 25 grand in that motor, would do it all over again but this time I went destroked ls7 and it made about the same power for half that money AND on e85. However, half the torque and needs 2,000 more rpm. Makes for an interesting road car.

[@littledeel]

@@baby-sharkgto4902was a typo. It was an ls7. There’s TONS of 700+ horsepower 100-120 octane 12-14 to 1 420-468 cubic inch ls motors out there.

[@Obshowersyndicate]

Engines are like women

[@mr.know_it_all]

Ls motors are overpriced trash without boost, change my mind

[@EngineBuilder]

Most high-performance engines use boost these days.

[@natelsx]

You must not know anything about cars/engines then. You can get more power per dollar out of a LS then any other engine out there.

[@lockedinstreetracing6005]

You have no idea wtf your talking about I’ve built several hot rods using junk yard Ls engines and I smoke everyone in my area I bet I can take you ride in the first Malibu I built and make you shit your self. That’s real talk

[@Mastermindyoung14]

Changing your mind is a fruitless endeavor. Change my mind.

[@smp3745]

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