Lsx454
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Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
Lsx454 Any reason not to go with an LSX454 for the street? Relatively mild build mostly relying on cubes rather than all out race...Anybody have thoughts and/or advice. I'm thinking new GM Performance 454 block and rotating assembly.
They all seem underwhelming to me. I was seriously considering one too til i noticed one thing in common in every youtube video, not a single one lights up the tires on a roll on. Why?
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
That is a terrific question. Not much impressive on you tube. Nobody braggin' on the forums. They're not terribly expensive. What gives? Would a 427(LS7) be better? I'm trying to get away from power adders.
Gm has a 570hp wetsump LS7. Turnkey aluminum motor ready to go. Doubt its gunna be any faster, but its got lots of potential. Even with just a few bolt ons. And pricing isnt terrible. Also there were rumors floatn around here of a 5k ls3 deal too...Again, great foundation for any hotrod with lots of potential.
Gm has a 570hp wetsump LS7. Turnkey aluminum motor ready to go. Doubt its gunna be any faster, but its got lots of potential. Even with just a few bolt ons. And pricing isnt terrible. Also there were rumors floatn around here of a 5k ls3 deal too...Again, great foundation for any hotrod with lots of potential.
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On The Tree
Joined: Jun 2019
Posts: 148
Likes: 29
From: Atlanta, GA
They are amazing value. I’ve seen a few of them make great power with HR intakes on a dyno, I wonder if GM underrated them.
The big advantage to the LSX over an LS7 crate or 416 is the 6 head bolts.
The big advantage to the LSX over an LS7 crate or 416 is the 6 head bolts.
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
I have a 6.0 with rectangle ports and a junkyard dog Cammotion cam now. The car is very fast as is, but rather than go to a turbo or super charger I was thinking big cubes. Less clutter, less tuning, maybe more longevity at about reasonably the same cost.
Did they change the cam or any work on the heads? Or literally just a high ram n some tuning? I chased my tail in circles bout buying one myself. I didnt like idea of going iron, that was prolly biggest factor for me. 620hp seems alil underrated for a 454 LS anything! Than again, its under a warranty iirc.
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
Did they change the cam or any work on the heads? Or literally just a high ram n some tuning? I chased my tail in circles bout buying one myself. I didnt like idea of going iron, that was prolly biggest factor for me. 620hp seems alil underrated for a 454 LS anything! Than again, its under a warranty iirc.
Well, now your opening up a bunch of options. Forget about that 454lsx altogether than. What Im currently building is an aluminum stroker with similar goals. Big NA powa! Im using a Darton sleeved gen 4 aluminum block from Mast Motorsports. 4.165 bore and 4.125 stroke. 450ci. The stroke shouldnt be a problem with the longer Darton sleeves n custom pistons. From previous experience, I will say this is the part where you ll wanna use an engine builder, not an engine assembler! I dumped 22k down the drain using a good parts budget, but the wrong guy! Well, some good parts at least. Some were bad too. Im pretty sure every SC ls3 variant makn every bit of 750hp+. At that point, staying NA, your gunna wanna use someone in the know. You ve got options with combination of cubes, cam, and lift. What intake are you planning on using?
Thread Starter
Staging Lane
Joined: May 2017
Posts: 54
Likes: 5
Well, now your opening up a bunch of options. Forget about that 454lsx altogether than. What Im currently building is an aluminum stroker with similar goals. Big NA powa! Im using a Darton sleeved gen 4 aluminum block from Mast Motorsports. 4.165 bore and 4.125 stroke. 450ci. The stroke shouldnt be a problem with the longer Darton sleeves n custom pistons. From previous experience, I will say this is the part where you ll wanna use an engine builder, not an engine assembler! I dumped 22k down the drain using good parts, but the wrong guy! Well, some good parts at least. Some were bad too. Im pretty sure every SC ls3 variant makn every bit of 750hp+. At that point, staying NA, your gunna wanna use someone in the know. You ve got options with combination of cubes, cam, and lift. What intake are you planning on using?
Sounds good. If your not buyn a complete shortblock or long block, than id defly do some additional research n make some calls. With a big iron block like the lsx, you ve defly got tons of choices n options. One guy on here made 834hp on a pumpgas 408! My 450ci wont make that mainly because of my intake manifold choice. Hopefully you ll do a seperate thread for your build. Sounds like a cool project. Lotsa sharp people here on this forum.
I would agree.
Mill and port the heads
Get static compression to 12:1
And put a moderately aggressive cam
Should be able to get 600hp to the wheels fairly easily.....and still be tame enough for daily (in traffic) driving.
KW
Mill and port the heads
Get static compression to 12:1
And put a moderately aggressive cam
Should be able to get 600hp to the wheels fairly easily.....and still be tame enough for daily (in traffic) driving.
KW
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
Originally Posted by Floorman279
my issue with these motors is i highly doubt any of the ls7 valve issue were addressed prior to these engines coming out.......i still dont think gm thinks the guides are an issue which leads me to believe these are made from a surplus of ls7 stuff laying around