LM7 = iron block 5.3 LM4/L33 = aluminum block 5.3
am i right
and what years wear the lm4/l33 in the trucks i am looking at doin a ls swap into a 240 and i wont to go aluminum but ls1s are hard to find around me just layin around in wrecked cars
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LM7 = iron block 5.3 LM4/L33 = aluminum block 5.3
am i right
and what years wear the lm4/l33 in the trucks i am looking at doin a ls swap into a 240 and i wont to go aluminum but ls1s are hard to find around me just layin around in wrecked cars
alot of views but no help come on guys bump
I think your right this dude i know owns tri-star towing and he asked me if they make a aluminum 5.3 and i told i dont think so.i went to see and it is a aluminum 5.3 out of a 2005 trailblazer, also i was reading your sig what did you have done to the 01 gmc to make what you didQuote:
Originally Posted by ma.racing
ls6 heads shaved .005 and 560 lift voodo cam malory coils ls6 intake fuel rail 45 lbs injectors pvc vented ported 90mm tb tb bypass egr delete lt headers off rd y pipe flows with turn downs lunady ls1 roler set e fans flat tops for alil more compression 4l80e built by kings trans 3000 yank converter hd drive shaft and 3.73 true track strange axels and the stock housing shortin 3 in with 3 in wheel spacers with the 20s on a 4 link and a tune from rwtd dyno tunes from mobile i prob left some stuf out but its close enuf big thing is heads cam roler setup and pistons
got some more info the lm7 is iron block iron heads lm4 aluminum block l33 aluminum block with ls6 heads and flat top pistons with a high lift cam i think its a 490 lift nice i think i wont to put the l33 in my 240 at 335hp at the crank stock
You are correct. Not sure on the years they put the L33 in and what models got them... Like he said, I know the trailblazers got them and I think the 5.3 Vmax's did also..
you say cam roler solid or is that hyd.also standered bore,dont know what this is (headers off rd) i need a set of e fans,what was your compression,and your pvc was vented,i have mine hooked to a pan evac on my exhuast i hope im brothering you with my ? just wondering why would you reather go with that l33 instead of a ls1Quote:
Originally Posted by ma.racing
its an off rd y pipe and it was a roller cam and i think it was around 9:10 not shur tho and and as for why go l33 well its not much lighter but just kinda and its way way cheaper and ezer to find and your not bothering me bro thats y im on this form to answer and ask ?S
well i a appreciate that,cool your truck looks good i like that color on it,what motor you doing now for your truckQuote:
Originally Posted by ma.racing
the 5.3L LM7 is an iron block w/ aluminum heads. The motorset I picked for my nitrous 240 application.
The L33 came in certain
* 2005-2007 Chevrolet Silverado 1500 4WD
* 2005-2007 GMC Sierra 1500 4WD
the LM4 in
* 2004 Chevrolet TrailBlazer EXT
* 2004 GMC Envoy XL
* 2004 Chevrolet SSR
i sold that truck and got an 04 ecsb that is stock but a tune and flows right now but im also lookin into a l33 with a t56 for a 240
and stevon my 05 silverado 2wd has an lm4 aluminum block and its the stock motor i no they didin come out with the l33 till 05 and they come out with the lm4 in 04 so anything above that prob had an option of each not shur tho
o and thanks blazed i loved the color to thats my favorite hof burnt orange that was my baby but i needed something with a lil more room and it was gettin close to bein maxed out n/a to still be a dd i couldin keep tiers on it
From what I heard when I bought mine, the L33 came in 05-07 Z71s.
also I think the L33s put out around 310hp up from 285 with the lm7
its 335 at the crank prob 310 at the wheels
nice truck man
oh i know what you mean about keepin tires on it,mine is a good tire layth,and not a problem about your truck,give me your opinon on this how much boost do you think i could make on my truck with a t76 front mount the way my motor is now about 5lbs w/ a snow kit,105octane 7lb w/ snow kit just a ?Quote:
Originally Posted by ma.racing
From what i have read, the iron block came in my 02 Z71, correct? I also read that iron blocks are easier and safer to bore, is this true?
L33 is the high output aluminum block 5.3 with flat top pistons and 799/243 casting heads. It has 310 hp.
The LM4 came in Trailblazers and Envoys and is also an aluminum block 5.3 but is no different than the LM7 iron block other than the blocks being a different material; internally they are the same and rated at the same 285 hp.
Aluminum blocks bore about .010" oversize a the most.
Cast blocks bore +.030" safely.
i dono man reall i mean you can run as much as you wont pep on hear are runin 18psi on the stock bottom end