hey guys just got the new gm high tech performance mag, and they said the new iron block lsx is going to have a max of 480ci. i was think about buildin one since the first time i herd about it. im looking to run 13.5.1 cpr, forged internals, ls7 heads, ls7 intake (maybe sheet metal), 700+ lift soild roller cam, how much hp n/a u think it will make or i should can it make? i also wouldnt hittin it with a little nitrous as well

 

At least 650 RWHP with an M6, maybe 700, especially with a sheet metal intake, 480 cubes, that cr and solid roller. Using an LS7 intake would be kind of ridiculous if you're gonna spend that kind of money on an engine, it will be the weak link between the intake and heads. LGM has ~625 RWHP from their stock LS7 with just a cam, tune and exhaust on pump gas, so why not 700.

I would guess.


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i think im gonna be puttin a turbo 400 to back that power up, and a dana 60 rear end as well. i really dont want **** to break, i know **** breaks when you start makin good power. anyone know when the excat date the lsx motor is comin out? i herd march of 07

 

**** will break...that is part of the deal with that kind of power. You would have to drive it like a pansy in order for it not to have something go really wrong.

 

yea i know thats why im gonna put the best **** so i have less of a chance. the car is gonna be hardly driven. i dont care i think its gonna be pretty nuts to have a 480ci small block with some cpr to back it all up.

 

DEFINITELY a bad *** setup!

 

thanks, ive been thinkin about this setup since i herd about the new lsx block. i cant wait. thanks for ur input!

 

If you're gonna wait until March '07, LS7 heads will be a thing of the past. I hear there's testing and developing going on for heads that will flow around 430 cfm. That could be another 55-60 hp.


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You can resleeve an LS7 block and get 480+ ci also and retain the dry sump.

A built 4L80E can handle 1000rwhp without a hiccup and provide overdrive and computer controlled shift points. There are a bunch running around in 3800lb+ 1000rwhp+ F-bodies running mid 8's and I believe Parish's AWD 408ciTT truck weighs 5,000lbs and runs one without any problems (1000rwhp/1090rwtq).

A TH400 will be cheaper overall and cheaper to rebuild but not be freeway friendly if you plan to cruise this monster.

 

gnx7 who does LS7 resleving??? i know the LS1 & 2 can be done but never heard anything about the LS7??

thanks Chris.

 

I do LS7 resleeving. The Darton LS7 style dry liner will go out to 4.185" bore for normally aspirated applications. The same sleeve will work in the LS2 block.

I have core LS7 blocks on hand for resleeving.

Steve

 

yea i know i just saw the posting on the warlock ls7x heads, im gonn have to lookin into them. thanks

 

i was thinkin that, but i thought a 4L80E is heavier and takes more hp to turn then aTH400. if it isnt, then i might consider a 4l80e, how much more do they usualy run? thanks for all the input guys.

 

ohhhhh thats great steve!

is the any advantage of using the LS7 block to reselve as to using the LS2???

thanks Chris.