Lsx454
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Joined: Oct 2020
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700 to 750 crank hp NA only needs roughly 408 to 427 ci using a 6.0 or Ls3 block with around 75 to 7600 rpm. All based on Pump gas. 454 will do the same with less rpm and higher budget starting with the Lsx block.
$2k+ for the block and around $1000+ for machine work.
$2k+ for the block and around $1000+ for machine work.
Banned
Joined: Oct 2020
Posts: 1,984
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Check out redbaronlsx454 on Youtube. He's had the 454 LSX in his car for a long time and been kicking *** with it from what I've seen on his channel.
https://www.youtube.com/user/redbaronprodutions/videos
https://www.youtube.com/user/redbaronprodutions/videos
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Joined: Oct 2020
Posts: 1,984
Likes: 682
Basing a whole series of engines on one cars results doesn't make much sense. I went from a LS2 w/LS3 heads Maggie 1900 to an LSX454, it made more torque, almost same power, and was faster. Had ZERO issue turning 28x10.5/15's to smoke! I had a TH400 with 3.7 gear behind it. I did an SD tune with an LS7 Vic Jr on top. The LSX454 made a good bit more power than my MAST 416, fancy heads, higher compression engine did that cost about the same all said and done.
Size (Lives) Matter 🤣
Rpm (being) Needed and the amount of Tq needed is generally the best way to go about things
Your car/truck weight + gear/trans are a Dead giveaway and it's Usage 😉
That guys video is what made me NOT order up a 454lsx. Watch the video with a 40mph roll on on NT05DRs. Barely got out of its own way...imho. That thing shooda laid down dual fat burnout marks! It didnt even look like it spun. I simply wasnt impressed.
https://youtu.be/rLeXbgcORsY
https://youtu.be/rLeXbgcORsY
https://ls1tech.com/forums/appearanc...on-lsx454.html
Basing a whole series of engines on one cars results doesn't make much sense. I went from a LS2 w/LS3 heads Maggie 1900 to an LSX454, it made more torque, almost same power, and was faster. Had ZERO issue turning 28x10.5/15's to smoke! I had a TH400 with 3.7 gear behind it. I did an SD tune with an LS7 Vic Jr on top. The LSX454 made a good bit more power than my MAST 416, fancy heads, higher compression engine did that cost about the same all said and done.
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Verdad Gallardo And that means what compared to the vids "I" saw? You didnt really state much in your arguements. Just more "opinions". Like saying ID injectors arent worth the money or any better than Bosch 210s. That is your opinion n your experiance. Im all about comparing stuff, but itd be nice if you used more specific info. My comment was in response to the guy qouting the Red Baron as "kicking ***". Im sure the lsx454 is a nice set up. But "in my honest opinion" its typically underwhelming. For whatever reason. I was strongly considering buying one for my car.
I would not call his car underwhelming but hard to judge from a highway roll-on. It is a 9 second car that doesn't appear to be a flyweight running 6.20's in the 1/8.
For a drop in and go crate engine the LSX454 is a pretty good piece. It can be better with some massaging but all that's really needed is a cam and intake swap for 700hp. Rated at low 600's with a stock ls7 intake, stock ls7 throttle body, and a 236* intake lobe peaking at only 6200 rpm. Put an MSD intake or single plane and something like a 250/266 on 113-114 cam in it and it'd fly on pump gas. If you don't mind taking the heads off then clip the heads to 12:1 compression for 93 octane and let it rip. The weight is the biggest concern...well, and I personally hate the orange paint lol.
https://www.youtube.com/watch?v=BlCB...redbaronlsx454
I would not call his car underwhelming but hard to judge from a highway roll-on. It is a 9 second car that doesn't appear to be a flyweight running 6.20's in the 1/8.
For a drop in and go crate engine the LSX454 is a pretty good piece. It can be better with some massaging but all that's really needed is a cam and intake swap for 700hp. Rated at low 600's with a stock ls7 intake, stock ls7 throttle body, and a 236* intake lobe peaking at only 6200 rpm. Put an MSD intake or single plane and something like a 250/266 on 113-114 cam in it and it'd fly on pump gas. If you don't mind taking the heads off then clip the heads to 12:1 compression for 93 octane and let it rip. The weight is the biggest concern...well, and I personally hate the orange paint lol.
I would not call his car underwhelming but hard to judge from a highway roll-on. It is a 9 second car that doesn't appear to be a flyweight running 6.20's in the 1/8.
For a drop in and go crate engine the LSX454 is a pretty good piece. It can be better with some massaging but all that's really needed is a cam and intake swap for 700hp. Rated at low 600's with a stock ls7 intake, stock ls7 throttle body, and a 236* intake lobe peaking at only 6200 rpm. Put an MSD intake or single plane and something like a 250/266 on 113-114 cam in it and it'd fly on pump gas. If you don't mind taking the heads off then clip the heads to 12:1 compression for 93 octane and let it rip. The weight is the biggest concern...well, and I personally hate the orange paint lol.
Last edited by rkupon1; Mar 1, 2021 at 03:20 PM.
And that means what compared to the vids "I" saw? You didnt really state much in your arguements. Just more "opinions". Like saying ID injectors arent worth the money or any better than Bosch 210s. That is your opinion n your experiance. Im all about comparing stuff, but itd be nice if you used more specific info. My comment was in response to the guy qouting the Red Baron as "kicking ***". Im sure the lsx454 is a nice set up. But "in my honest opinion" its typically underwhelming. For whatever reason. I was strongly considering buying one for my car.
If you want ID 2000 or 2600 or whatever they sell go buy them and be happy, I don't care as you aren't spending my money. When people offer me their cash/credit card to build a car I try to get them the biggest bang for the buck. Some guys just want expensive parts so they can brag at cars and coffee, that's not my scene.
Not sure what that means, mine was in a family car that was ~3800-3900lbs. I revved it to ~7600 and ran 1 7/8" headers to dual 3" exhaust so it wasn't annoying. I beat the crap out of it and never had an issue. That engine ended up getting turbo'd and now is going in a car with a 2.9 whipple on top of it.
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Not sure what that means, mine was in a family car that was ~3800-3900lbs. I revved it to ~7600 and ran 1 7/8" headers to dual 3" exhaust so it wasn't annoying. I beat the crap out of it and never had an issue. That engine ended up getting turbo'd and now is going in a car with a 2.9 whipple on top of it.
I went from a LS2 w/LS3 heads Maggie 1900 to an LSX454, it made more torque, almost same power, and was faster. Had ZERO issue turning 28x10.5/15's to smoke! I had a TH400 with 3.7 gear behind it. I did an SD tune with an LS7 Vic Jr on top. The LSX454 made a good bit more power than my MAST 416, fancy heads, higher compression engine did that cost about the same all said and done...
All Different engine builds Same 3800 lbs car. Blower Helped with the Weight vs the 416 having less Tq, the 454 Helped with tq. IDK if the 454 had SC or Turbo TQ but the added .125 crank stroke Helped. Besides the bigger Bore.
That said, the Guys asking for SC Ls3 numbers..
650+ fwhp & 600 ftlbs of TQ.
😑
All Different engine builds Same 3800 lbs car. Blower Helped with the Weight vs the 416 having less Tq, the 454 Helped with tq. IDK if the 454 had SC or Turbo TQ but the added .125 crank stroke Helped. Besides the bigger Bore.
That said, the Guys asking for SC Ls3 numbers..
650+ fwhp & 600 ftlbs of TQ.
😑
That said, the Guys asking for SC Ls3 numbers..
650+ fwhp & 600 ftlbs of TQ.
😑
That said, 650fwhp and 600lb/ft is pretty easy to achieve by any means, that's only 555whp/510wtq. I've seen well built SBE NA LS3's close in on 500whp. In my car 450hp ran 11.3, 600hp ran 10.3 if that helps the computation at all.
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Joined: Sep 2019
Posts: 825
Likes: 263
From: Melbourne, Australia
I have a built lsx, 1st go round was with ported ls3 heads , ls3 intake , 239/254 btr cam, that made 540rwhp.
Then went to mamo ls7 heads and msd intake 255/269 solid roller cam and it makes 675rwhp, itll light up the street tyres at 70mph. I drive it every day, tow big loads, ill spin it to 7400rpm every time i get in it
a supercharged ls3 weighs more than the lsx once all add ons are done... i really didnt notice much difference with the extra weight in my car
When i pulled the engine down for upgrade i did notice the piston skirts had a bit of wear but nothing id really worry about plus i dont think the builder specced pistons correctly..
Im happy i built mine and id do it again if going NA
Then went to mamo ls7 heads and msd intake 255/269 solid roller cam and it makes 675rwhp, itll light up the street tyres at 70mph. I drive it every day, tow big loads, ill spin it to 7400rpm every time i get in it
a supercharged ls3 weighs more than the lsx once all add ons are done... i really didnt notice much difference with the extra weight in my car
When i pulled the engine down for upgrade i did notice the piston skirts had a bit of wear but nothing id really worry about plus i dont think the builder specced pistons correctly..
Im happy i built mine and id do it again if going NA
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
Well I would say that these replies answer my question...I am going to plan an LSX build. If I fall a little short of power a 100-150 shot of nitrous should do it with no ill affects on the forged bottom end.
TECH Fanatic
Joined: Mar 2014
Posts: 1,266
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I'm not sure if you realize that the GM LSX block needs a **** load of machine work and will end up costing a lot more than a Dart Pro Iron skirted Next block. The Dart is all around a much better piece too.
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
https://www.gmperformancemotor.com/parts/19417353.html
Please read the description. According to this maybe some decking...
https://www.gmperformancemotor.com/parts/19417353.html
https://www.gmperformancemotor.com/parts/19417353.html
No warranty once he takes it apart or modifies it, so thats out. Also said he wanted to assemble it himself, so why start out with a crate motor under warranty? Between thst n the hp rating he s looking for, i still dont see why he s considering the lsx454. Maybe I missed something. Mickyinks kinda proved my point, he loved his, but it had very little in common with the GM crate motor the OP was asking about. Can you buy the GM 454lsx as a built bottom end shortblock? If so, than thats a pretty good start as your top end options are limitless. Not to mention the lack of wait time for a custom shortblock. This thread is all over the place.
One guy on here once said, GM builds the best motors. I totally get that. If the motor meets your goals, sure is a no brainer
If one more builder wasted my time on the phone, i was ordering the 454lsx or the 570hp wet sump LS7 n throwing my intake on it. I would have been driving my car already n lovn it. But I no doubt made a mountain out of a mole hill n went full custom...again...
At some point, you have to decide what you really want!
One guy on here once said, GM builds the best motors. I totally get that. If the motor meets your goals, sure is a no brainer
If one more builder wasted my time on the phone, i was ordering the 454lsx or the 570hp wet sump LS7 n throwing my intake on it. I would have been driving my car already n lovn it. But I no doubt made a mountain out of a mole hill n went full custom...again...
At some point, you have to decide what you really want!
Last edited by rkupon1; Mar 3, 2021 at 11:33 AM.