LSX block weight
 

I did a search but didn't see what it weighs over a LS1 or LS7 block.
Anyone know the difference?

100 lbs heavier with everything in it

Thx for the info. Doesn't sound to bad i guess. Thx again.

100lbs heavier for alot more power you will be alright

FWIW: Weight of an LS1 block is 95 lbs..

If your staying N/A I cant see them making up for the weight. FI or N20 is another story.

That's what i was thinking, if i was gonna go with a 427 i think i would go
with an LSX block. Especially since i still would wanna use my ATI kit at low
boost ofcourse ;)

But in last september i got a sweet '02 SS with 2,000 original miles:)
It's to perfect looking right now but after just selling my WS6 with the mods
in my sig. i'm going thru power withdrawal..lol. I do plan on doing mods to the SS , just not what. I like the AFR heads, or the Terminators, or PRC's S1 LS6 heads and a Vig3200. We'll see.

The LSX is approx. 80 lbs heavier than the 6.0L iron block, which itself is about 75 lbs more than the LS1 aluminum. All told, the LSX weighs just about 250 lbs before it is bored out to size.

IMO that weight will not matter when your making at least 600rwhp with this block.

Oh man...thats right 80lbs isn't nothing to worry about for piece of
mind. A few weeks ago i was thinking of selling the ATI kit( also new ) to get the LSX
block and just save to build a 427 or even a 454:) Both nastalgic chevy
engine sizes. But with just selling the WS6 i have a little $$$ to get the
SDConcepts belt tensioner, a TR blower cam and i have a brand new set of
GTP S2 6.0 heads( again was thinking of selling ) that Craig and i talked hours on the phone about runner size,
valve sizes and other stuff. I even had the heads flowed local to me and at .600 lift they
flow over 305cfm. I just want a nice strong street setup until i can build a
serious motor. I have time and in no rush to deside yet. Thanks everyone for your input.

if I was you I would go with the LSX454 that LME just sold awhile ago.leaning goin that route in the future.good luck on your decision.

Thanks, i'll check theirs out. I was looking at TSP's 454LSX short block. With the upgrades to Callies crank, and ARP stud kit, and Callies rods the cost is $6,600.00
That's a good price. But thanks for the info on LME's 454. I like the stuff they've done
like the Maggie blower install.

you do realize he said it is 80lbs heavier then a 6.0l iron block right?? which means it is like 150lbs heavier then an ls1 block. If you are staying na it really wouldn't be worth it since you would need alot of extra hp to make up the weight difference. The lsx block is really designed for people that are trying to build an all out extreme motor

Most sources put the standard deck version at ~225 lbs. IMHO Weight can always be taken out of the car though!

Our basic short block from Bryan at LME was $6,599, and all you have to do is look at his reputation. That is for:

(Copy and pasted from our build sheet)
454" LSX Shortblock. Balanced, blue printed and assembled. GM LSX block, Callies Compstar 4340 4.125" crankshaft, Callies 6.125" H beam rods w/ ARP 2000 7/16" bolts, Wiseco 4.187" custom forged nitrous pistons, Childs & Albert Fire Power rings .043" .043" 3mm (for reduced friction & high heat applications), Clevite MS 2199 H main brgs, Clevite CB663 H rod brgs, Dura Bond CH-23 cam brgs, ARP main studs.

Oh man thanks for pointing that out. I didn't catch that since i was asking
how much heavier the block was over the LS1/LS7 block. I didn't ask about
the 6.0 block. Seems strange the block is that much heavier than a 6.0 since it's iron. And since they are both dimentionally the same size, small blocks.
I can see 100lbs more than a LS1 block cause the bores will be bored out which will drop alittle weight. I just saw on GM's site the block weighs 225lbs.
An LS1 is nearly 95lbs. I look at it this way, it's like driving with a 130lbs girl in the car with ya all the time. Sure it's gonna be heavier, but i'm not out to beat John Force i'm just looking at options on motor sizes, plus i still plan on running a little boost. A 454 would make 550 to 575rwhp or more plus tons of tq...over 550ft/lbs or so. I don't think an extra 130lbs would slow my car down too much.

No doubt about LME thats for sure. I've been impressed with them since
they were a sponsor. That's true lighter control arms, K-members, plus the motor is an animal, the difference in weight for the street/some racing is marginal.

yeah it wont slow your car down to much if you have a power adder and you could always take the extra weight out of your car with some other form of weight reduction..the only thing that sucks is that all that extra weight is just at the front of the vehicle which is why i wouldn't want to use one if i was staying na

It is kind of funny I was thinking the same thing at first, then I realised that most of us will run at least a 9"; and we are actually going with the heavier S60 in the rear which will add a bit more weight to the back end. Of course that means hardcore weight reduction all around, but enough to leave a surface resemblance to a street car.

So really you have to add weight all over the place to support the power... :emb:

Yeah i know what u mean. The reason i like my SS cause it's a coupe ( no t-tops ) and no traction control. The car feels lighter thru the steering and i added an SLP lid and couldn't believe how quick this little bastard moves...lol. I jumped on it lastweek and it smoked the tires all thru first..lol. I was shocked:D My WS6 in stock trim wasn't nearly as quick, but shit that was 6 years ago, i forget what i did yesterday:) But from coming from a worked WS6 A4 with a stall, i'm surprised how quick the SS is.

Go LSX - even if you stay NA - your talking possible 600hp with a streetable build?? Where are you going to get that with the other blocks? I dunno 'bout you guys, but HP is the name of the game, and I think the LSX block is all about more HP. Who cares if it weighs a lil more? 100 pounds is a only 0.10 seconds in a 1/4 mile! WHO CARES!!!!

That was my original thought when i was looking at the TSP 454LSX. I know
the block is heavier, but thats the beauty of it all. No sleeves that might drop, and i personally don't like adding stroke without bore. The 454 is the motor u can install and forget. No worries about not having enough hp or tq.
And on the street it would be hard to kill the motor.
Oh i wanted to add...the price is hard to beat.

Just Do It!

I concur with you .either vendor you cant go wrong.like said weight not goin to matter if your making around 600hp.bottom line is the right combo setup.

I'm wanting to go LSX here soon - just wondering whats the biggest cube you guys have heard coming from one of these?

tall deck coming out soon according gmht performance mag. latest issue.extra half inch of deck height now@9.75 inches can support at least 500cid or more.

needs custom intake or spacers.

i cant wait for the day when they release a true big block with big block heads and a big block version of the fast intake - all built around the ls engine concept just EVERYTHING bigger

ya I hear ya.

imo, that much extra weight up front really screws up the whole car handling.
How do I know? well I have a 370 cid iron block.
I had to remove a lot of other weight to offset that and that is not cheap. Relocate batery, tubular A arms etc...
For street, if I had to do it again, I would go 383 alum or 402 alum.

I concur with you also predator.mine wont be for the street.strictly a weekend warrior track car.

I don 't 100% agree with that..I had a '94 and '95' LT1 Z28 with a Powerdyne blower. And my '95 Z handled perfect. The LT1 was iron and was a heavy motor and the blower kit weighed 35lbs or more. All i really need to do is add
either stiffer springs or stiffer shocks. Like i stated earlier anyway, i'm not looking for a stripped down drag car only a great street car. I've been in 383 strokers and i rather just run a forged 347. If i'm going to pull the motor i'm not going to bother with only adding 36 cubes for the cost of a nice crank, rods(for my ATI kit), machine work and pistons. I can just add AFR heads and 228 cam for less and be close to the 2 383's i personally drove in. BTW, i don't see what's wrong with the LSX block, the 100lb + difference is nothing if you setup the suspension for it. If i added just my ATI on my stock SS i would still need to buy suspension parts to handle the power. In my WS6 i was bending rear sway bar links with the stock control arms after my head/cam and stall install.
But if i do stay alum. i would go 387 big bore, yes i know about the re-sleeve cost or LS7 block, or go 427. The LSX 454 was just an awesome street option i've been thinking about cause a fully built short block from TSP is $6,630 with top parts.

Dude you confuse me...lol. You concur with Preditor-Z about LSX weight
BUT you look forward to gm offering a big block setup. A big block is gonna
be heavier. But i appreciate everyone's input.

I did some more searching on 383 strokers. I'm surprised how little power they
are making. I'm sure theres more to it. But it does look like if you add a blower/turbo to a 383 the motor
is powerful. Then i started to think, no laughs please:), the bore is only 3.898".
The power pushes the rotating assem. to make power, obviously. But if the piston
is to small compared to it's stroke, the motor doesn't get enough air for the 383 to
makes its full potential. Now force air in there it's like what a bigger piston would
do and you got a killer motor. I've been in 383 LT1's and they are great. Been in a few LS1 383's and didn't like it. My WS6 setup in my sig. was faster than 1 of the 383's i drove in. But Talon WS6 (Tommy) built a all bore with a small cam with heads that wouldn't
seal and the thing was scarey. Anyone that knows Tom here knows how fast his
setup was.

Weight distribution, those are the key words. 6.0 Iron is 92lbs heavier than LS1, and LSX is almost twice that ~165 lbs. add your ATI and that is 200 lbs heavier on the nose, so yeah if you do not take any high speed turns and don't brake heard in straight line it will handle great.

Take good advice, LS2 402 forged with 1 BAR boost and you can write your name on the tarmac and still carve corners like a madman.

LOL...i like that" write your name on the tarmac"....i have time to think. I'm
very picky..anyone that knows me personally can tell ya. I had a stage 2 head and TR224
cam in WS6 at first. Car ran an 11.98 before i had the Vig.3600 install. But since this
was before LS1Edit i sent my pcm to Ed Wright 3 times to get the tuning right.
I got so pissed i tore my car apart in my garage and stepped my setup back to
small runner stage 1 and 216/220 and the car ran better cause Ed's tuning work just
barely good enough. Then after EDIT came out i spent hours learning it and got
my setup to run great. Anyway thx for the advice i appreciate it.

I got quotes from LME and TSP and I ended up going with LME. In the end the price wasn't even comparable.

Ill have some pics up at the end of the week. Bryan shipped out my 454 friday.

Lsx block is 225 lbs about 130lbs heavier then an ls1 block.

Bah...

Just to back a good friend, we went in with Jermzz to do a quote with both TSP and LME.

Bryan gave us, in the end, a much better price with all of the upgrades included; we also got the nuance things with our build, like the conversion harnesses, clearanced oil pan/windage tray/oil pick-up tube etc etc.

We have been and will continue to be TSP customers, so I am not knocking them at all. Although, it wasn't hard at all to go with the outstanding reputation of LME, the outstanding customer service we continue to receive, and the pricing of our LSX 454 ordering experience with them.

BTW, OP, good luck withever you decide!

not trying to brah!looking forward to see not buy.already have a 454 BBC block just in case I want to mess with it down the road.good luck with your decision das all.

Thats cool...To me the difference in weight doesn't really seem to be a
problem. But i do appreciate Preditor's advice, but like i noted earlier LT1's are heavy as well and the handling was razor sharp. But just to let you
guys know, Bryan emailed me back with a price super fast. LME has excellent
customer service and they use the best parts available and their prices are
aweswome. Not to blash anyone, especially a sponsor, but i've PM'd TSP
a few times about heads and never got a responds. I guess they are just
really busy. I still like their work though. In the mean time until i get my motor built, i might as well have fun and install my ATI kit, ARP studs, and maybe my GTP S2 6.0 liter heads that Craig massaged the runners for the
high volume and velocity from the D1SC. I want to thank all you guys for
your advice, you really help me think this time instead of just going out
and buy parts then never install them..lol.

OK so I was reading on this thread and seen that one of you mentioned a 454 with boost. I was originally planning on using a 454 with a Whipple w175ax supercharger and was told that I'd basically have to eventually it out because It was going to fail catasrophically under boost. So would I be fine or would I be better to stick with a 427? They'd both be from TSP simply because IMO they are the best ones on the market for the money (or at least what I've been telling myself). Sorry for any misspelling because this was sent from my Alcatel Onetuch.

434 CI 4.155" Bore X 4.00" Stroke
Best Bore Stroke Combo (if you want/need long stroke) W/Big 300+ Power Adder in LSX Iron Block Standard deck.