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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 10-07-2011, 10:27 AM   #1
toilets

 
Drives: 2010 camaro
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How to convert LS3-427

Hello,

Ok, Im weighing all options here, I have inquired about a TT set up, single T set up and now would like to know what might all be involved with converting my LS3 to a 415 or 427?

Having said that, What is done to convert my standard LS3 motor to a 415 or 427?

What all needs to be done? do i have to change out my rearend?

Does anyone know roughly what the cost maybe do have this completed?

just trying to explore my options as I need a road course/autox type set up and so far I have been steered away from F/I due to the sudden power increase which I cannot have obviously. I need a smooth steady throttle and N/A seems to be the direction people are leading me too.

Thanks so much for any input
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Old 10-07-2011, 11:35 AM   #2
toilets

 
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Also,

I see, for example that SLP has a LS7 block for sale for 7G with no core... Is this honeslty all these LS7 motors run?
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Old 10-07-2011, 06:33 PM   #3
JLE58

 
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If You are sure your going to stay N/a then go with the 427 if not sure then going with a 416. You need to buy a 427 or 416 stroker kit and have your stock block set up for the kit. You not going to be able to get a crazy amount of power staying N/a with out speeding a good of money and losing alot of driveability not that you care just throwing it out there. I say go buy a procharger like the one for sale in the "parts for sell section" and hammer down.
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Old 10-13-2011, 09:53 AM   #4
Jason 98 TA


 
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We have 427 LS3 short-blocks in stock. You can buy a short-block & move your parts over, or we can build you a complete 427 LS3 long block to meet your power goals. We typically see street LS3 427s go in the 670 flywheel horsepower range!
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Old 10-13-2011, 10:19 AM   #5
CC Performance
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Quote:
Originally Posted by toilets View Post
Hello,

Ok, Im weighing all options here, I have inquired about a TT set up, single T set up and now would like to know what might all be involved with converting my LS3 to a 415 or 427?

Having said that, What is done to convert my standard LS3 motor to a 415 or 427?
You have two different things here...

First the block comes as a 4.065 bore ..

Now for the 416 you clean the bore up .005 and go with a 4" stroke crank.. the 4.070 bore x 4" stroke gives you 416 cubic inches

for the 427 you do the same bore 4.070 but go with a 4.100 stroke...

This gives you 427 cubic inches BUT the added stroke means you need to move the rings upward on the piston and this compromises the piston and as such we dont recommend it for a power add applications

So for your TT you want a 416... forged internals and built to the proper compression for the fuel your going to use.. the lowest amount of octane it will see if what you set you compression for...
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