N/A build... LS7 block vs LS3
06-03-2009, 02:28 AM
#2
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I'm assuming that your going for 427ci? What are you going to use the car for? Do you think you may want to spray it in the future? How's your budget looking?
-Joel
-Joel
06-03-2009, 03:07 AM
#5
Some people might complain about the cylinder liners in the LS7 block cracking. But if i remember correctly the people who were having that problem weren't NA. They were either boosting or juicing the **** out of it. If you stay NA or doing go insane with spray on it you should be fine. Im debating on whether to get an LS7 or LS3 block myself, so i have been doing research.
06-03-2009, 03:16 AM
#6
Why settle for a 427 ? The ls3 block is $1400 and the LS7 is $2700.. SO if your going to drop $2700 over $1400 then I would go with a re-sleeved block and have a 460ci you can spray a 200 shot on top of if you need to 
Our 460 long block run's mid to low 9's in a 3300 lb car n/a on pump gas
Our 460 long block run's mid to low 9's in a 3300 lb car n/a on pump gas
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06-03-2009, 06:49 AM
#8
Why settle for a 427 ? The ls3 block is $1400 and the LS7 is $2700.. SO if your going to drop $2700 over $1400 then I would go with a re-sleeved block and have a 460ci you can spray a 200 shot on top of if you need to
Our 460 long block run's mid to low 9's in a 3300 lb car n/a on pump gas
Our 460 long block run's mid to low 9's in a 3300 lb car n/a on pump gas
Is the 460 just a longer stroke? The LS7 already has a 4" stroke doesn't it? Is it just a 4.10" stroke to make it the 460?
06-03-2009, 10:32 AM
#11
Between the ls3 and ls7 427s it would be cheaper to build up the ls3.plus with the longer stroke you should make more torque through the whole rpm range. The little bit of hp you would gain using the bigger bore ls7 wouldn't be that significant. Plus the $1300 that you would save could go to other mods or more exotic parts. Just my .02
06-03-2009, 10:37 AM
#12
Between the ls3 and ls7 427s it would be cheaper to build up the ls3.plus with the longer stroke you should make more torque through the whole rpm range. The little bit of hp you would gain using the bigger bore ls7 wouldn't be that significant. Plus the $1300 that you would save could go to other mods or more exotic parts. Just my .02
We can do a 445ci with the LS3 block as well too though
or the 416 is very very stout with the right heads on top. 
06-03-2009, 03:42 PM
#15
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Between the ls3 and ls7 427s it would be cheaper to build up the ls3.plus with the longer stroke you should make more torque through the whole rpm range. The little bit of hp you would gain using the bigger bore ls7 wouldn't be that significant. Plus the $1300 that you would save could go to other mods or more exotic parts. Just my .02
06-03-2009, 05:49 PM
#16
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Not everyone is cracking LS7 blocks....and they have the doweled billet main caps. I hit mine every track outing w/ the 180 1st stage and w/ a tighter convertor (3400) was hitting it out the hole. Got another one nearby running 7psi boost and well over 700rwhp w/ the stock internals.
