the stock production block is not nearly as strong as the better aftermarket blocks, and in a 9 second car Id suggest getting a DART splayed bolt block, the stock production block is rated for use at up to about 350-450 hp,
thats fine but chevy rates those, and current production, 4 bolt blocks as good for 350hp
http://www.sallee-chevrolet.com/ChevyBa ... 05123.html
http://www.sallee-chevrolet.com/ChevyBa ... 66034.html
even the chevy strait 4 bolt bowtie blocks only rated at 450hp
http://www.sallee-chevrolet.com/ChevyBa ... 85047.html
you get ahold of one of these bad boys, theres no worries of block cracking or grenading at 500+hp.
we all know guys who have built engines exceeding 450hp with stock blocks but the blocks not designed for that stress and the main caps tend to walk at 450 plus, yes you may get away for years before something fails, but the blocks not nearly as strong as a BOWTIE,DART,BRODIX etc designed for racing, keep in mind an engine that makes 450 peak hp is making much less at lower rpms, any engine held at max rpms will far more quickly show its flaws than one thats only occasionally run hard, thats why the dyno hero gets to show the proof his engine peaks at 450 plus hp, and still gets to drive the car on the street for months or even years, its very seldom run at full stress levels
you need to get into the splayed 4 bolt main cap blocks before the hp rating exceeds 450hp-500hp,
and your looking to sharply exceed that.
theres an excellent chance the main caps will be squirming around on a stock block at those hp levels and thats not good for durribility.
http://www.dartheads.com/products/block ... locks.html
standard two bolt production block (below)
standard production 4 bolt block(below)
splayed bolt 4 bolt main cap block (below)CNC BLOCKS POSTED THIS PIC.
thats fine but chevy rates those, and current production, 4 bolt blocks as good for 350hp
http://www.sallee-chevrolet.com/ChevyBa ... 05123.html
http://www.sallee-chevrolet.com/ChevyBa ... 66034.html
even the chevy strait 4 bolt bowtie blocks only rated at 450hp
http://www.sallee-chevrolet.com/ChevyBa ... 85047.html
you get ahold of one of these bad boys, theres no worries of block cracking or grenading at 500+hp.
we all know guys who have built engines exceeding 450hp with stock blocks but the blocks not designed for that stress and the main caps tend to walk at 450 plus, yes you may get away for years before something fails, but the blocks not nearly as strong as a BOWTIE,DART,BRODIX etc designed for racing, keep in mind an engine that makes 450 peak hp is making much less at lower rpms, any engine held at max rpms will far more quickly show its flaws than one thats only occasionally run hard, thats why the dyno hero gets to show the proof his engine peaks at 450 plus hp, and still gets to drive the car on the street for months or even years, its very seldom run at full stress levels
you need to get into the splayed 4 bolt main cap blocks before the hp rating exceeds 450hp-500hp,
and your looking to sharply exceed that.
theres an excellent chance the main caps will be squirming around on a stock block at those hp levels and thats not good for durribility.
http://www.dartheads.com/products/block ... locks.html
standard two bolt production block (below)
standard production 4 bolt block(below)
splayed bolt 4 bolt main cap block (below)CNC BLOCKS POSTED THIS PIC.