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Old 09-27-2012, 09:31 AM   #15
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It's far less $ to mod the LS3 to make more power than the LS7. Also, anyone that is interested stop in...we have a low 9 sec 2011 in the shop that is COPO power with street legal use yet.

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Old 09-27-2012, 09:43 AM   #16
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Old 09-27-2012, 11:58 AM   #17
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I pulled my factory ls7 motor and sold it to put in a LSX forged motor. Another local just did the same.

With how fragile the ls7s are you are crazy wanting to put on in. Do forged motor for 1/2 the cost that is 3x as strong. Why spend a ton of money for cast pistons and fragile heads.
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Old 09-27-2012, 01:39 PM   #18
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Too much work for not enough payoff - thinking specifically about the dry sump setup. Spend the same amount of money and make more power. Unless you specifically want to say "I have an LS7."
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Old 09-27-2012, 03:01 PM   #19
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The thing you need to figure out if the dry sump and the pulley spacing. I think the pulley spacing is different with the LS7 crank, you should talk to someone knowledgeable before you buy anything.
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Old 09-27-2012, 03:28 PM   #20
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No way I woild do a factory LS7. Way too much money for what you get. If you are for sure going to stay all motor for the rest of the cars life then sure do a LS7 block but I would use aftermarket everything else. Having the heads and internals aftermarket will save a ton of money plus it will be more reliable and make way more power. The current LS7 has a bit of a problem in that is chews up valve guides. In extreme cases they have dropped a valve from this blowing the motor.
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Old 09-27-2012, 03:30 PM   #21
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Just need a spacer for the crank for the longer snout. SDPC sells them. That will allow you to convert to a dry sump and run all the factory stuff.

Still, not worth it at all. Spend less and get a better motor. Just like buying a GMPP crate motor with stock rods and crank for more than aftermarket, it is just stupid.
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