Generation III Internal Engine 1997-2006 LS1 | LS6
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Old Apr 20, 2019 | 02:45 AM
  #21  
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Honestly that is a very good question.
I think a testament to the 4032 is the recent dyno throwdown where LME used a mahle 4032 in their 427lsx. Had some pretty high boost and i think 30 runs? The head gasket blew before the pistons flinched and that was 1500hp and a TON of torque.

So, that being said, i think i would draw the line at 250hp of nitrous and 20lbs just to be safe. I mean guys are pushing the stock 200k mile hyper e pistons over that, but i like to be a little conservative.
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Old Apr 20, 2019 | 04:28 PM
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Originally Posted by jhshnh
Ok thanks. It’s always been my main concern with a 4” crank. I know a couple of guys with 383 LS1s that burn oil but I certainly can’t say they had good machine work.
That happens a lot when an engine assembler slaps an engine together vs a diligent engine builder.
Most issues go back to the wrong taper piston was used. Bad machine work could always be a factor.

Neither my 383 or 416 are oil burners both have 4 inch stroke and Wiseco pistons with skirt taper designed specifically for using a 4 inch crank. The 383 uses less oil than my 99 TA did 100 percent stock.. The 416 uses like a stick LS1 - half quart between oil changes. Several other piston companies have similar solutions.
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Old Apr 20, 2019 | 05:54 PM
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Originally Posted by 99 Black Bird T/A
That happens a lot when an engine assembler slaps an engine together vs a diligent engine builder.
Most issues go back to the wrong taper piston was used. Bad machine work could always be a factor.

Neither my 383 or 416 are oil burners both have 4 inch stroke and Wiseco pistons with skirt taper designed specifically for using a 4 inch crank. The 383 uses less oil than my 99 TA did 100 percent stock.. The 416 uses like a stick LS1 - half quart between oil changes. Several other piston companies have similar solutions.
Glad to hear that. I’ve been debating going with a 3.9 strictly because of oil burning but this makes sense as to why I’ve seen a couple guys with 383s having issues burning oil.
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Old Apr 20, 2019 | 09:46 PM
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Happy to share my. 02 worth of info

BTW - NA with the right piston & ring package the 4 inch crank shouldn't be an issue in an LS1/LS2/LS3 etc. With Forced Induction probably not worth the cost of a stroker crank in most cases since boost can make massive hp with a stock 3.62 crank.
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Old Apr 23, 2019 | 10:15 AM
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I saw that lsx in thatmme shoot out that was crazy.
What is tapered skirt? The skit on the pistion actually tapered?
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Old Apr 23, 2019 | 02:45 PM
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Originally Posted by dmaxs10
I saw that lsx in thatmme shoot out that was crazy.
What is tapered skirt? The skit on the pistion actually tapered?
They’re all tapered.
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