redls3

GM lsx 454 from gm is the complete long block and the erl454 is only for the shortblock.


which engine would you rather have?


lsx 454 is pushing 620 horsepower and 590lb torque. those are close to zr1 numbers on a na engine.


i know its a stupid question but is the lsx 454 and much better engine and stronger then the stock ls3?

LS1LT1

For a naturally aspirated application I prefer an aluminum block, those LSX blocks are great but they are HEAVY.






Better? It is stronger/better for making big power and probably better for boost or nitrous yes but it's likely also less fuel efficient, it's heavier and more expensive (buying the motor, removing the old one etc.) so it being 'better' or not is really up to the individual.

matt_lowry123

I can't give any input but I wish I had a 454 in my car!!!

xstang

I'm having a 454 done at ERL right now... I like the lighter block!

Sparo2

I would go with the ERL block unless you're going with power close to 2,000HP. Personally I don't like the iron blocks in these cars that were designed w/ aluminum blocks.

Those ERL block are real strong and there's guys pushing over 1000HP through them all day long.

redls3

So would it be better to do an erl 454 N/A or an erl 427 built for boost.

I plan on prob boosting down the line since im a horsepower junky. What engine would be better for boost 427 or 454

xstang

I would do the 441, If I planned on running boost:

M6 Turbo Street/Strip:

Dry Sleeve 4.125 4.125 441 10.0:1 Wiseco Compstar Compstar $5000

redls3

that sounds like a nice setup also . Hey xstang hows your build over at Cartek going or is it finshed yet?

i know erl does a superdeck 500ci engine also for about $7500. i dont know if that would be overkill for the street.


its funny the hardest problem i have in my life right now is choosing engine sizes for the c6

xstang

The 500 is $9900 isn't it?

http://www.erlperformance.com/gm-ls-...i-short-blocks

I should have my motor from ERL in a week or two.. I have everything else, Just waiting on the shortblock.

redls3

yea your right


talked to erl and looks like the 441 is the way im gonna go

Bob K

I'm waiting for my ERL 454 also.

I just sent my L92 heads to WCCH for the stage 3 porting.

Bob K.

RichieRichZ06

What is the actual dry weight diff between the 2 blocks, maybe 100 pounds? That's no more then adding a blower, intercooler, plumbing etc to the top of an aluminum engine. For comparison sake, a TVS kit must weigh at least that much.

SpinMonster

The LSX block increased weight is no different that the total weight for a supercharger plus the aluminum block.

Anyone that is disallusioned as to the power differences, a 454 makes 500rwtq at 1000rpm and there is no waiting for boost. It doesnt lose boost on shifts lowering power. It also gets tuned to 13:1 a/f ratio and not in the 11's like boosted motors. Anyone thinking economy is better on a 9:1 compression motor on the hiway with parasitic belt loses is just dead wrong.

620HP N/A would stomp 640hp FI on an M6 car.

The LSX block is about 90lbs heavier but the rewards on that motor are worth it. I'd get that thing for my hummer in a heartbeat off warranty. You dont mess with a daily driver until you have to.

xstang

Bob, when did you order go in..? I think Mine was March 28th when they started (I ordered on the 23)

redls3

hey spin what would you recommend to do if i plan to boost in the future.

would an ERL 441 built for boost be the best option since the shortblock is $5000

or the LSX 454 longblock which is $9900


What is the difference besides the slightly bigger displacement and weight??

Bob K

I ordered it on 03/23. I have no idea when they started it. I spoke with Sean last week and asked for head gaskets for the 4.185" bore also.

500 ft lbs of torque at low RPM's is what I'm looking for.

Bob K.

LS1LT1

How much does the ERL block weigh?

I know the LSX block is roughly 125 pounds heavier than the average aluminum LS1-LS9 block, but perhaps it's only 90 pounds more than the ERL block?

SpinMonster

We heard different but I didnt verify mine. I know if I was building a big boost car, it would have the LSX block even at +125.

The LSX454 comes with 6 bolt LS7 race heads. Thats 3k there.

When it comes to shortblocks, I dont shop price. I get in line for an HKE shortblock. Penny wise......

SpinMonster

Limit stroke to 4" for big boost. Is the 441 a tall deck? Anyone have issues with headers being they are connecting to a higher location?

LS1LT1