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replacin ls1 bottom end

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Old Jun 3, 2007 | 08:08 PM
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Default replacin ls1 bottom end

i have a 109k mile ls1 block in my 1998 z28 and i was wondering if replacing the whole bottom end with a 6.0 iron block would be possible?

using my 5.3 teas intake and fuel stuff would this even be a good idea?

(i figure it be easy to get some forged pistons while the 6.0 is out to bc i'm a bottle baby)
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Old Jun 4, 2007 | 11:21 AM
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yeah im pretty sure thats possible but me personally i wouldnt do it i wouldnt want the extra weight up front and im pretty sure if u forged the ls1 bottom end it will hold alot more power then ur going to throw at it, just my 2cents
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Old Jun 4, 2007 | 12:37 PM
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I agree, why not just forge the aluminum block?

Anyways, the 6l iorn short block will be a direct swap.
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Old Jun 4, 2007 | 07:57 PM
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how much does something liek that roughly cost to forge it?
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Old Jun 4, 2007 | 08:02 PM
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just rods and pistons, 1000-1500... that is if you stay with the stock crank. also have to add the cost of the shop to bore.(300-600 depending where you go) maybe a new oil pump while your in there 130

just depends how much upgrade you want to do and what power goals you have
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Old Jun 4, 2007 | 08:06 PM
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ok b/c i was thinking about this after summer b/c id like it to hit car with a 200 shot out of the hole but itll be after i get my 12 bolt n trans
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Old Jun 4, 2007 | 08:18 PM
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You can get a forged 383 rotating assembly for your block for just over 2K. I will probably try to go that route, myself, next summer.
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Old Jun 4, 2007 | 08:38 PM
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and thats all i would need is the rotating assembly for a 383?
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Old Jun 4, 2007 | 10:28 PM
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but considering the possibility of selling my ls1 block then forging my 6.0 then spraying the **** out of it, wouldn't it be reasonable at taht point?
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Old Jun 5, 2007 | 01:51 PM
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ttt!!
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Old Jun 5, 2007 | 02:05 PM
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I was also throwin around the idea of forging a extra stock LS1 short block. I figure I can find a high mileage short block for about $500. Then get the following:

Callies 6.125" LS1 Comp star rods w/ARP hardware $599
Mahle Fordge 346 LS1 pistons $509
Clevite bearing for complete motor $300 (kinda just guessed on this could be less)
ARP head bolts $140
GM heads/cam gasket kit $150

All parts from Texas Speed comes out to $1698 + shipping for parts w/o the extra short block. Thats using everything else that could transfer from my current motor. Plus the more work you can do yourself the more you'll save.
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Old Jun 5, 2007 | 08:58 PM
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what would all be needed to do a 383 stroker motor and around how much would that cost????
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