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how to change an LS2 364CID to a LS2 402 ?

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Old Jan 29, 2008 | 06:41 PM
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Question how to change an LS2 364CID to a LS2 402 ?
how do you make a 2005 LS2 364ci a ls2 402 cid ?
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Old Jan 29, 2008 | 06:52 PM
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4" stroke crank... or make a 412 with a 4.1" stroke crank
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Old Jan 29, 2008 | 07:01 PM
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Originally Posted by someday
4" stroke crank... or make a 412 with a 4.1" stroke crank
and some rods and pistons
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Old Jan 29, 2008 | 07:56 PM
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Question LS2 Stroker
what Rod size would i need ? basically i have a 4.005 bore so if i go a 4 " strocker Crank then it would be a 402ci ? or if there is clearance with a 4.100 Crank then it would be a 412cid ? LS2
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Old Jan 29, 2008 | 07:57 PM
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Question So basically
the 364CID LS2 has a 3.622 crank then ? making a stock LS2 364cid with an aluminum block a ls2 402cid would not be a wise idea would it ? better off going with an iron block right ? plus i only have scat i beam rods 6100 with 7/16" ARP cap bolts it would be better off having H beim rods right ?
Last edited by BadLtBlu99TA; Jan 29, 2008 at 08:11 PM.
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Old Jan 29, 2008 | 08:19 PM
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the ls2 alum block work fine for a 402,go with a 4'' crank,6.125 h beam rods and you can get off the shelf pistons,stock bore is 402,.030 overbore is a 408,if your in the market for some parts let me know
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Old Jan 29, 2008 | 08:24 PM
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All you need to do is a 4" crank. There is nothing wrong with a 4.0 bore and 4" crank. Some guys have done enough bore to get a 403 but that is really just machining for the pistons. There are lots of 402's and 403's making big power. As far as what size rods, check with any of the sponsors. I am sure you can find that info on their web pages. On the I beam rods, I believe scat rates them fairly high for HP. Keep it N/A and I bet you would have no problems. Just do some research through sponsors and searches here.
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Old Jan 29, 2008 | 08:26 PM
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Originally Posted by Shawn @ VA Speed
030 overbore is a 408,if your in the market for some parts let me know
I dont think this is recomended for a ls2. The ls2 block is aluminum and does not have the clearances for boring 30 over. 408's are iron block 6.0 motors bored 30 over.
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Old Jan 29, 2008 | 08:43 PM
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bore x bore x stroke x 6.2832 = CID
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Old Jan 29, 2008 | 08:58 PM
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Originally Posted by smask04C5
bore x bore x stroke x 6.2832 = CID
^^^ only for V8s

bore x bore x stroke x # of cylinders x 0.7854 = CID
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Old Mar 23, 2008 | 11:40 PM
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Does anyone have audio of an LS2 402 at idle? Various cams, etc?
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Old Mar 24, 2008 | 11:05 AM
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Originally Posted by WhiteDeathLS1
Does anyone have audio of an LS2 402 at idle? Various cams, etc?
Here's an clip of my car idling from a couple of years ago.

http://s155.photobucket.com/albums/s...t=MVI_0170.flv
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Old Mar 25, 2008 | 02:17 PM
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Originally Posted by WhiteDeathLS1
Does anyone have audio of an LS2 402 at idle? Various cams, etc?
At the risk of hijacking this thread, I do.
Here is my new 403. Idle Video
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Old Mar 25, 2008 | 03:26 PM
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4" crank
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Old Mar 25, 2008 | 07:40 PM
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DrkPhx & ArKay99... thank you. I think this adds value to this thread.
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Old Mar 26, 2008 | 12:48 AM
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Originally Posted by 00Hawk437
DrkPhx & ArKay99... thank you. I think this adds value to this thread.
Look at the date of the OP then look at Whitedeathls1's post. He obviously did a search and pulled up this thread requesting an audio of a 402 at idle and we obliged.
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Old Mar 26, 2008 | 10:58 PM
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drkphx where did you get your 6.6 badge?

i'm running a 408 iron block, it was just cheaper , wish i would of got an aluminum one tho
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Old Mar 27, 2008 | 12:11 AM
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Originally Posted by 89Formulaws6
drkphx where did you get your 6.6 badge?

i'm running a 408 iron block, it was just cheaper , wish i would of got an aluminum one tho
I made it sort of. I took two GTO 6.0 badges, cut and glued them together.
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