Home›Forums›Technical – General›Tech Articles, Links & Calculators›RB26, 2JZ & Barra 6 eat your hearts out!
This topic contains 6 replies, has 4 voices, and was last updated by VRSenator065 8 years, 4 months ago.
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July 23, 2016 at 9:07 am #18653
LF24Participant- Ipswich
- - \'99 ls1 Holden VS ute - \'02 HSV Maloo R8
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Posts: 57Not sure if anyone has seen it yet. Quite an amazing article about how much abuse and power a cast iron LS can handle. I just bring this article up these days whenever anyone starts cracking on about bang for buck or 1000hp stock bottom ends.
http://www.hotrod.com/how-to/engine/hrdp-1109-stock-gm-ls-engine-big-bang-theory/
July 23, 2016 at 9:43 am #18657
VRSenator065Participant- Adelaide SA
- VR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project)
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Posts: 5 777Cant find it right now, but supposedly my block will comfortably handle 1800hp. There is an article floating around about an LSx block failing but it was a very early one that had suffered core shift. Said it before I think the LS platform is the modern version of the venerable (and awesome) small block. Anyone who has had the sump off of one and seen how the big ends etc tie everything together etc can see the strength.
July 23, 2016 at 10:12 am #18661
ImmortalityParticipant- 97 HSV Senator 185i 02 VX L67 Calais
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Posts: 535I think the big point with that article is the fact that they opened up the top ring gap, I have no doubt that engine would most likely have failed spectacularly if they had left the standard top ring gap as the extra heat from the FI would have had the ring gap close up, grab the bore and rip the top off the piston. Most guys throwing a turbo kit on a stock LS motor would never bother to do such a modification.
I believe there are also some differences between the LS truck motors and the more common 5.7 litre car engines which have known issues with the bore liners once a certain power level is reached.
The big point to note again is that engine longevity is greatly influenced by the quality of the tune
- This reply was modified 8 years, 4 months ago by Immortality. Reason: speeling
July 23, 2016 at 10:29 am #186634.8 and 5.3 are different to the 5.7. Biggest change the block material obviously. The ring gap would of made a massive difference
LSX are rated to 2000hp depending on the cubic inch. 454 the walls are getting thinner. Generally the big power boosted vehicles are around 408cube.
its one thing to make the power. Another thing to keep it together.
- This reply was modified 8 years, 4 months ago by cava454.
July 23, 2016 at 10:40 am #18667
VRSenator065Participant- Adelaide SA
- VR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project)
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Posts: 5 777Yea appreciate the LSx454 is getting to the limit wall size, actually I think its more the gap between bores for head sealing? I think that’s why the boosted version is 396ci, and also the full race spec 454R is actually a higher stroke & taller block to reduce the bore size.
July 23, 2016 at 1:23 pm #18671They are known to split down the bores between cyclinders.
July 23, 2016 at 4:29 pm #18673
VRSenator065Participant- Adelaide SA
- VR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project)
View build HERE
Posts: 5 777I guess around 2,000hp something might give. 1,000hp all day long would do me
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