Built 5.7 vs 6.0 for boost
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Built 5.7 vs 6.0 for boost I have a SBE late (04') LS1 which has the GEN4 internals, glide, 88/102, e85. It has a soft tune in it, 12psi of boost. I'm at the point where I want to turn this up, so looking to do a built engine. Is the 5.7 block worth building? I want to stay alloy, do I have anything to gain strength wise by going to a GEN4 alloy 6.0 block? Power goal is right around 1000rwhp. Any input would be great.
Whether or not it's worth it is probably the correct question ...
Generally speaking, adding cubic inches at the same power levels will be less stress on the components. Same power, less psi. You will be stuffing the same volume of air into a larger container.
You may have some gains at low RPM, before you start spooling, but you probably wouldn't notice it in most cases.
Biggest thing I like about the 4.000"+ bore blocks is the ability to run the LS3 heads.
Generally speaking, adding cubic inches at the same power levels will be less stress on the components. Same power, less psi. You will be stuffing the same volume of air into a larger container.
You may have some gains at low RPM, before you start spooling, but you probably wouldn't notice it in most cases.
Biggest thing I like about the 4.000"+ bore blocks is the ability to run the LS3 heads.
Had 2 friends with similar combos except one was 5.3 based and other was 6.0 based. The latter no surprise spooled a little better.
That said I've bought into the approach of '5.3's are better' so my in-progresss engine build is based on a gen IV aluminum LC9, will be going .005 over and that's it.
That said I've bought into the approach of '5.3's are better' so my in-progresss engine build is based on a gen IV aluminum LC9, will be going .005 over and that's it.
Wouldn’t you pick the block with the thickest sleeves?
5.7’s have been known to crack sleeves.
I’d be interested to know more about the Gen IV alum 6.0 in that respect.
The increase in CID would be a bonus.
5.7’s have been known to crack sleeves.
I’d be interested to know more about the Gen IV alum 6.0 in that respect.
The increase in CID would be a bonus.
To my understanding both the LS1 and 6.0 have thin cylinder walls.
With that said I know several guys who've made 1000whp with the LS1 block, there are better and cheaper options out there though.
I think what it comes down to in those cases is tune for longevity, hell one guy with the LS1 block is using a very nice crank/rod/piston combo with twin PTE 7675's and a small hit of nitrous, still going.
Another local cat had the LS1 with GenIV rods, stock pistons and made 720whp through a 4L80E before he ran out of turbo and those transmissions soak up quite a bit of power.
I've got a forged rod/piston setup in my LS1 with a billet S484 that I fully intend to push into the 1000whp range from time to time.
If that combo starts giving me issues I'm gonna copy @Pro Stock John LC9 setup because those are far more stout than any LS1/6.0 deal.
IMHO if you're intending to run consistently in the 1000whp range I'd source a better block, L33, LC9 or even LM7 if you don't mind the weight.
With that said I know several guys who've made 1000whp with the LS1 block, there are better and cheaper options out there though.
I think what it comes down to in those cases is tune for longevity, hell one guy with the LS1 block is using a very nice crank/rod/piston combo with twin PTE 7675's and a small hit of nitrous, still going.
Another local cat had the LS1 with GenIV rods, stock pistons and made 720whp through a 4L80E before he ran out of turbo and those transmissions soak up quite a bit of power.
I've got a forged rod/piston setup in my LS1 with a billet S484 that I fully intend to push into the 1000whp range from time to time.
If that combo starts giving me issues I'm gonna copy @Pro Stock John LC9 setup because those are far more stout than any LS1/6.0 deal.
IMHO if you're intending to run consistently in the 1000whp range I'd source a better block, L33, LC9 or even LM7 if you don't mind the weight.
Would be great if we could lure back folks like Kurt Urban @427 to share his experience, he knows so much. I think tuning has come a very long way from 10-15 years ago, lot of guys in the past I know did not have combos that stayed together as long as they do now.
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Well an ls2 block is gen 4 and siamese, also offered in 0.030" over from GM I believe for reman. From what I have seen over the years they are quite stout for a 4" bore stock aluminum block. I'm not sure of those last year ls1's were siamese or not, but sure the rods are better and gen 4. Seems like the best stock gen 4 blocks are 5.3, ls2 and ls9 with the 5.3 being pretty bomb proof other than being small.
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I have a SBE late (04') LS1 which has the GEN4 internals, glide, 88/102, e85. It has a soft tune in it, 12psi of boost. I'm at the point where I want to turn this up, so looking to do a built engine. Is the 5.7 block worth building? I want to stay alloy, do I have anything to gain strength wise by going to a GEN4 alloy 6.0 block? Power goal is right around 1000rwhp. Any input would be great.
Would be great if we could lure back folks like Kurt Urban @427 to share his experience, he knows so much. I think tuning has come a very long way from 10-15 years ago, lot of guys in the past I know did not have combos that stayed together as long as they do now.
I'm still in awe over an engine you can pull out of a pickup truck with 200K miles on it, make little to no upgrades on it, hit it with 30+ lbs. of boost easily making a 1000hp or more and use it for multiple seasons for pennies on the dollar.
Having grown up on SBC/BBC I have to say the LS platform pound for pound is quite possibly one of if not the best all around engine platform ever designed.
Having grown up on SBC/BBC I have to say the LS platform pound for pound is quite possibly one of if not the best all around engine platform ever designed.
I'm still in awe over an engine you can pull out of a pickup truck with 200K miles on it, make little to no upgrades on it, hit it with 30+ lbs. of boost easily making a 1000hp or more and use it for multiple seasons for pennies on the dollar.
Having grown up on SBC/BBC I have to say the LS platform pound for pound is quite possibly one of if not the best all around engine platform ever designed.
Having grown up on SBC/BBC I have to say the LS platform pound for pound is quite possibly one of if not the best all around engine platform ever designed.
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