LT1-LT4 Modifications 1993-97 Gen II Small Block V8

when should u fill a block?

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Old Nov 1, 2010 | 02:04 PM
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Default when should u fill a block?

my car is a daily driver. when i eventually get it where i want it, it will put out 750-800rwhp on nitrous. my question is when should i think about having the block filled? i already have a forged bottom end so im not too worried about the rotating assembly breaking. mainly the block.

are the main stud girdles worth anything?
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Old Nov 1, 2010 | 05:51 PM
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NOw!!!!
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Old Nov 1, 2010 | 06:24 PM
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BEFORE the block is machined.

You fill it now it will need a fresh line hone and bore hone IF you can get away with it without having to replace the pistons.
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Old Nov 1, 2010 | 08:23 PM
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i mean how much hp before it is necessary
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Old Nov 1, 2010 | 08:33 PM
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My point is you have a fully assembled running engine. To fill the block now you are looking at halfway starting over. I mention that because "you already have a forged rotating assembly" so it sounds like you want to modify your current setup rather than start over.
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Old Nov 1, 2010 | 08:33 PM
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Originally Posted by 96capricemgr
BEFORE the block is machined.

You fill it now it will need a fresh line hone and bore hone IF you can get away with it without having to replace the pistons.
This^^^

I'd do it when the motor becomes more of a strip than street motor, regardless of power level. You can NEVER have too strong of a block, EVER. I think my machinist did it for 150 bucks, which is nothing. Let the stuff cure for 2 weeks before you start machining it.
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Old Nov 2, 2010 | 09:03 AM
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im just curious how much a block without fill can handle reliably. when does having a non filled block become an issue?
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