5.7l-vs-6.0l Cam Only
10-11-2006, 11:09 AM
#1
5.7l-vs-6.0l Cam Only I cant take any more of this guttless 4.8!!!!!!! 
I have a 99 5.7l and a 02 6.0l, I can't decide which would be the best in my truck. Both engines are low mile warrenty jobs, they ran fine but had a little piston slap, but Im not worried. 1/2 the ls1 I hear rattle alittle!! I have a custom ground ISKY cam 218@.050 / .578 / 110 +2. Im after torque, I know the 6.0 has better heads but only 9.4:1 comp, 5.7 has more comp & is lighter. I need help I keep changing my mind dack and forth = no progress!!! 
I have a 99 5.7l and a 02 6.0l, I can't decide which would be the best in my truck. Both engines are low mile warrenty jobs, they ran fine but had a little piston slap, but Im not worried. 1/2 the ls1 I hear rattle alittle!! I have a custom ground ISKY cam 218@.050 / .578 / 110 +2. Im after torque, I know the 6.0 has better heads but only 9.4:1 comp, 5.7 has more comp & is lighter. I need help I keep changing my mind dack and forth = no progress!!! 
10-11-2006, 01:34 PM
#4
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Originally Posted by PREDATOR-Z
6.0, slap a thinner gasket on and a light mill to raise Scr
Is 0.040-0.060 head milling okay with say .605/.609" of lift?
10-11-2006, 02:59 PM
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Originally Posted by brentg454
...what he said. Take the cubes every time.
i'm interested in this question. I'll be putting up a large post in the near future about my build options and a few questions, so this may take care of one of those questions before i post
10-11-2006, 03:15 PM
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Originally Posted by SonofaBish
even over the extra weight brought from the iron block?
i'm interested in this question. I'll be putting up a large post in the near future about my build options and a few questions, so this may take care of one of those questions before i post
i'm interested in this question. I'll be putting up a large post in the near future about my build options and a few questions, so this may take care of one of those questions before i post
If its an LS2 then go with that, but if its a truck motor, I'd stock with the LS1, since it has more power stock and it much lighter.
10-11-2006, 03:34 PM
#7
Originally Posted by TransAminal
I'd stick with the LS1, since it has more power stock and it much lighter.
who keeps anything stock these days besides my mom and her priuSHIT??
there's no replacement for displacement (except forced induction and juice 
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10-11-2006, 08:24 PM
#8
Originally Posted by TransAminal
What are the motors out of?? I'm assuming the 5.7 is an LS1, but is the 6.0 a truck motor or an LS2?? The LS2 is aluminum block, so I'm assuming the 6.0 you have is out of a truck.
If its an LS2 then go with that, but if its a truck motor, I'd stock with the LS1, since it has more power stock and it much lighter.
If its an LS2 then go with that, but if its a truck motor, I'd stock with the LS1, since it has more power stock and it much lighter.
10-12-2006, 03:16 AM
#9
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That issue is irrelevant because it doesn't apply.
each .006 is worth 0.1 point in SCR.
The LQ4 that you have has 72 cc heads, similar to LS6 but with bigger chambers.
Even if you run GM MLS gaskets, they are 0.050 crushed thickness.
If you would mill the 6.0 heads .035, you would be close or at LS1 compression.
Still can run stock length p-rods on .600 lift cam (7.400)
Iron block is 92 pnd heavier. That translates in .1 sec loss at track. But the trq and power obtainable quicly offsets this. I switched from LS1 to 370 cubes when my motor took a crap. I'm not sorry I did, numbers in sig with a 232/234 cam (considered smallish for size of motor)
each .006 is worth 0.1 point in SCR.
The LQ4 that you have has 72 cc heads, similar to LS6 but with bigger chambers.
Even if you run GM MLS gaskets, they are 0.050 crushed thickness.
If you would mill the 6.0 heads .035, you would be close or at LS1 compression.
Still can run stock length p-rods on .600 lift cam (7.400)
Iron block is 92 pnd heavier. That translates in .1 sec loss at track. But the trq and power obtainable quicly offsets this. I switched from LS1 to 370 cubes when my motor took a crap. I'm not sorry I did, numbers in sig with a 232/234 cam (considered smallish for size of motor)
10-12-2006, 11:52 AM
#10
Originally Posted by PREDATOR-Z
That issue is irrelevant because it doesn't apply.
each .006 is worth 0.1 point in SCR.
The LQ4 that you have has 72 cc heads, similar to LS6 but with bigger chambers.
Even if you run GM MLS gaskets, they are 0.050 crushed thickness.
If you would mill the 6.0 heads .035, you would be close or at LS1 compression.
Still can run stock length p-rods on .600 lift cam (7.400)
Iron block is 92 pnd heavier. That translates in .1 sec loss at track. But the trq and power obtainable quicly offsets this. I switched from LS1 to 370 cubes when my motor took a crap. I'm not sorry I did, numbers in sig with a 232/234 cam (considered smallish for size of motor)
each .006 is worth 0.1 point in SCR.
The LQ4 that you have has 72 cc heads, similar to LS6 but with bigger chambers.
Even if you run GM MLS gaskets, they are 0.050 crushed thickness.
If you would mill the 6.0 heads .035, you would be close or at LS1 compression.
Still can run stock length p-rods on .600 lift cam (7.400)
Iron block is 92 pnd heavier. That translates in .1 sec loss at track. But the trq and power obtainable quicly offsets this. I switched from LS1 to 370 cubes when my motor took a crap. I'm not sorry I did, numbers in sig with a 232/234 cam (considered smallish for size of motor)
