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I need some help with a lS7 build

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Old Oct 16, 2007 | 07:19 PM
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TwoTransMan's Avatar
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Default I need some help with a lS7 build

I have an lS7 and I need some help on what it would take to get to car to run high 10's N/A and dip down lower with 150 shot. I have the machine shop stroking it to a bigger cube engine but I have not idea what size to go with. Then heads that came with the motor are going to get ported and polished as far as a camshaft I have not decided on a Solid roller or just to stay hydraulic. The car it's going into is a 98 T/A with a worked T56 and a 12bolt I have about $4500 to play around with. If you have any ideas I am all ears and need some help.
Thanks
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Old Oct 17, 2007 | 09:23 PM
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There is something wrong here. An unmodified LS7 would easily put an F-body in the tens. An LS7 is already 427 cubic inches, you can't make it much bigger. If you plan to spray it you should replace the pistons, not the crank. Replacing the (forged) crankshaft seems like vandalism to me. What do you mean by “the heads that came with the motor”? Are they LS7 heads? LS7 heads are CNC machined and don't need to be ported. Are you aware of the changes necessary to make an LS7 run with the T/A’s PCM? You’ll probably need most of your $4500 for the the installation.

Last edited by Gary Z; Oct 17, 2007 at 09:43 PM.
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Old Oct 17, 2007 | 10:40 PM
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Originally Posted by TwoTransMan
I have an lS7 and I need some help on what it would take to get to car to run high 10's N/A and dip down lower with 150 shot. I have the machine shop stroking it to a bigger cube engine but I have not idea what size to go with. Then heads that came with the motor are going to get ported and polished as far as a camshaft I have not decided on a Solid roller or just to stay hydraulic. The car it's going into is a 98 T/A with a worked T56 and a 12bolt I have about $4500 to play around with. If you have any ideas I am all ears and need some help.
Thanks
Spend you moeny one suspension. Talk to madman so your car will hook and pull the 60' times you need to pull a ten. 10's possible with a stock ls7, but will be a pita. Just put a nice cam in it, then it will do over 500rwhp. With good suspension, 28' slicks, 4.11's you could pull a 10 no problem without juice. Then juice a 150 shot should be close to dropping you in the 9's
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