Who here knows something about the 5.3's?
08-09-2009, 12:25 AM
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Who here knows something about the 5.3's?
I was referred here from ls1tech. I am curious to know the differences between the different year model 5.3's from say 2000 to the present. More specifically an lm7. I want to get my hands on one. More than likely from a junkyard or off tech. Is there a more "desirable" year model of these motors performance wise? Seems like I read somewhere that the 03+models had better internals, I could be wrong though. This will be for a 5.3l turbo build. Thanks guys! I know my ls1's but jack about these others
08-09-2009, 12:38 AM
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There are a few varieties of 5.3's
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
08-09-2009, 01:59 AM
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There are a few varieties of 5.3's
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
08-09-2009, 02:03 AM
#5
There are a few varieties of 5.3's
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
there is the iron lm7
the aluminum l33( lower compression, good boost motors)
iron l59 05+(flex fuel, larger injectors)
and the 07+ not sure on the code on them, but they come with better flowing heads and make more power stock
thats just a quick rundown off the top of my head, you came to the right place some of the experts will be able to fill in some more details
actually the L33 is higher with CR at 9.9:1 which is why it loves the modified roots blower!
"LS6" heads, aluminum block, flat top pistons, kinda like a baby LS2.