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!

[Bozemanjustin]

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

[robertphillips]

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

[Mark-zzvx]

What's the bore spacing on the ls?

[michaellaughlin]

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

[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 ...

[b.c]

Piston out of the bore!!!!😮 that means ALL THE COMBUSTION is in the gasket right?

[davidincognito]

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.

[Vturbo]

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. 😆

[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

[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.

[kevinshasteen]

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

[Stevesbe]

This dude should stop being so excited

[WestVirginiapatriot]

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

[gunluvS]

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

[chesspiece]

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.

[ndAmendProtector]

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 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 Koenig isn't doing something correctly.

[michaelpearson]

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

[mrmeadowsiscool]

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

[blixxy]

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

[LSCBTHEWAVY]

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