GM LSX 427 Build-Up

The new re-engineered small block 427 ci LSX gets a build-up with Pinks star Nate Pritchett.
See more at: www.lsxtv.com
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[@ekitching]

One nice feature of the LSX block is that you can change or inspect the lifters without removing the heads, on a stock LS engine block, you must remove the heads to replace the lifters. I think it is a great block. Just as strong as a big block, but some 50 pounds lighter. Also, it is capable of a 4.25 stroke. With a 4.125 bore, that is 454 cid in a small block size...wow.

[@rotaryray]

Able to handle 2000 hp when using the 6 bolt heads and boost

[@ReFuzy]

Id love to have this engine

[@craigep08]

An iron block can hold more power than a aluminum block. That's why he mentioned it can handle more nitrous and boost. If you leave the motor as it is then an aluminum block would be better. But you put boost or some squeeze to it, iron block is the way to go

[@DanSVT03]

ERL's LSX blocks are all aluminum and they're good for 1,500-1,600+ horsepower.

[@DanSVT03]

Stephen Bagnell I know that, but if you're not building something with outrageous horsepower then you don't really have to go with an iron block. There are a lot of durable aluminum blocks out there that can handle some serious abuse. But yeah, the iron LSX's are good for over 2,000 horsepower which is crazy.

[@12345harleyman]

Brother has a billet bbc making more power than I am with more cubic inch's more of everything. He just spent more money than I did.

[@Bishop5k]

what an amazing platform.....GM!

[@manzo70]

one day this will go in my '02 SS

[@joshuaabuzaid9258]

Oh man!!! Those hollow sodium valves never drop either!!!

[@ricksanchez4825]

Hey Nate.Have them put some headers on that thing.But those were some stout numbers.

[@shawnlibby675]

LSX runs 4 O2 sensors in the manifolds on each side that would 8 02 sensors

[@turbochevelle5641]

Total overkill to a budget build when you can take a junkyard 4.8,5.3 or 6.9 and make those numbers on head work, cam and e85.

[@jubjub905]

Turbo Chevelle its not for a budget build....plus the latter is going to be a lot of nickel and diming...

[@anthonywebber2211]

6.9?

[@Dr_Xyzt]

That's a badass impala.

[@65feda]

LSX FTW!

[@brianallen0826]

I have been told the lsx block has had issues with core shift

[@backfirejg]

So has the earth but it's still here.

[@jimclarke1108]

Real engine

[@richardscarlett7942]

Im not sold that this 427 block is a true 427 block, I bet it shows that its 5.7 or 6.0 stamped on the back of the block. They just bore them over to hit the 427 ci numbers like everyone else is doing. Its still a small block just bored over?

[@lexustech48]

The LSX block requires machining if you get the bare block. It's as small as 309 cubic inches with the shipped bore finished with a 4.8 crank, all the way up to 500+ cubic inches with 4.2" bore and 4.2"+ stroke with the 9.70" tall deck version. As for being a factory production 427, this is a standalone Performance Gen IV small block not found in any car or truck from the factory.

[@johnsottile1513]

GO CHEVROLET!!!👍🏁💰🤪

[@galegregory341]

looking for a better engine that will replace the 1999 Northstar 4.6

[@dphorgan]

Gale Gregory LS4 327. made for front wheel drive cars

[@galegregory341]

But will it replace the 4.6 Northstar think it is 1999 Cadillac

[@240sxmetal4]

Did they just build an iron block LS7, and it's suppose to be better?... It's just a heavy ls7.

[@Cyber_Nomad01]

+240sxmetal It should be able to handle more boost, but they aren't boosting it. Very weird.

[@kdkn92]

So this is basically a LS7 with a LSx block.

[@Scribles]

👍

[@Cyber_Nomad01]

So.... You built an Iron block LS7???

[@hoghogwild]

+Jeremey Allen Yes, with an iron block that can support over 2000hp for drag racing, combined with the LSX heads which have 6 bolts per cylinder and have a MUCH thicker deck.

[@anthonywebber2211]

Iron Blocks are stronger than Aluminum Blocks

[@k.tucker2011]

Come on gm make a v10

[@kevin11288]

lol are those forged connecting rods.. or are the the stock titanium I-beam bull shit.. here you go a $20,000 stock motor thats twice as heavy lol

[@lordapophis5723]

I wonder if GM ever made a 500 ci engine?

[@SavageBunny1]

Lord Apophis yeah they make a 572ci crate engine, not sure if it's built mostly for trucks because of its size.

[@lordapophis5723]

Martini time thanks for the reply, I find it fascinating.

[@Olaf275]

There is also the Cadillac 500, which is exactly 500 Cubic inches

[@anthonywebber2211]

These are GMC engines 477.7-cubic-inch (7.8 L) 478 was one of the largest V6 engines ever built. 702-cubic-inch (11.5 L) V12 "Twin Six"

[@bustamantealdo]

Because i have 15-20k to drop on a lsx, why do i have to be so poor!☹😭😭

[@iMrKronic]

it didn't show them setting the timing chain??? lmao thatd be funny if all those pistons ate valves.

[@henrylevy1456]

You just built a ls7

[@lexustech48]

A 427 that can take 2000+ hp with boost.... you'll split an LS7 in half trying to get half that much power.

[@davidlilley9150]

Could have said use all ls7 parts on a lsx block and hit 500fwhp. thats all that was needed to be said...

[@arielatom03]

i was expecting way more power

[@BoostedOne1320]

+arielatom03 Considering that the LS7 makes 505bhp stock.. I was too haha

[@emill910]

+arielatom03 I'm not sure why, they used LS7 , Heads, Cam, Intake, and even has the same 11:1 compression ratio. This is practically a Iron LS7.

[@joedicarlo8817]

+emill910 there just trying to promote all the parts they offer. It is basically a ls7 with a lsx block and wet sump

[@blackericdenice]

Ford make 526hp from a 312 cuin V8. If that engine was a 427. It would make 719hp. That 219 more hp.

[@lrecollet]

+blackericdenice here you go www.hotrod.com/how-to/engine/1504-how-to-build-a-z06-corvette-slaying-lt1-small-block-without-a-supercharger/

[@blackericdenice]

lyle recollet Cool, when I stop, I will check it out.

[@blackericdenice]

lyle recollet This is not stock.

[@ThrottleKnife]

Im guessing you refere to the 5.2 L Voodoo, that is a specialty engine so not really a fair comparison. the LSX is for building "cheap", reliabel performance, it would be more fair to compare the Voodoo to the LT4 volume for volume as they are in the same price range: Ford: 1,66984 hp/ci vs Chevy: 1,78571 hp/ci. And BMW's S63 (S63B44T2) (268 ci) makes 567hp which kicks both the chevy and the fords ass with 2.11567 hp/ci. But i would say the Chevy has the best tuning potential.

[@blackericdenice]

ThrottleKnife Don't try to white wash the 5.2. It's killing the 7.0 end of story.

[@jalh3256]

for a 427 ci (7 L ) engine he said "economical" and i said lol

[@FELiPES101]

ja lh obviously not meaning fuel economy but in cost to build

[@rocksteady8986]

once he said he can't show everything i shut it off.. if all the parts are in the catalog then whats there to hide...

[@Nicks_Thrift_Picks]

He meant he can't show it all due to time. They covered a lot for a 6 minute video.

[@w41duvernay]

The cam is too small! I would have put in a Crane Cam LS cam instead.

[@turftalk83]

Lol !!

[@stevenwitt2555]

Great videos... but really a waste... all that money just to build a basically stock 427...

[@stevenwitt2555]

Not really anything special here.... it's all factory ls7 parts.. except the block...... and not to mention them shity ass heads.. block is good .. but them raggedy ass heads gonna drop a valve .. not very reliable..