when the muscle cars were common in the streets the 396,427 and 454 Chevy big blocks were common and as time passed a bit of an over bore of .060 and a 1/4" stroker crank, making the 4" stock stroke 4.25" in a 454, resulted in a 496 displacement and for several years that was about as large as the average guy could easily build a big block with off the shelf parts, and yes there were and are .100 over bore pistons, and a few guys built 512 cubic inch race engines with partly filled coolant passages , to help support really thin cylinder walls , but after the aftermarket blocks became rather common, with 4.500-4.600 bore sizes and wider oil pan rail spacing and the oil passages moved up from the pan rail to the cam tunnel area, it became fairly easy to build a 598-632 displacement, then dart, brodix, and world products and others started to provide wider bore spacing and taller deck blocks making even 700 plus cubic inch big block chevy engines at least possible for those few guys with really deep pockets.
there are now aftermarket blocks with 11" plus deck heights and 5' bore spacing that will allow well over 700 plus inches of displacement, but cost escalates rapidly to the point where its no longer anything but a custom build engine that has little resemblance to the original engine dimensions or even vaguely similar in cost, to what can be purchased from chevy.
chevy now has a 572 cubic inch engine available that produces 720 hp in as delivered form,and with a few tweaks kicking it up past 800 hp hardly a challenge, for the more experienced engine builders. .
Id point out that the heads,intake design, cam type and duration and lift and compression ratio you select have a HUGE effect on how effectively you can use the larger displacement combos, without good components you will have a hard time effectively feeding the larger displacement engines
while theres always ways to increase horsepower and in many cases displacement up until fairly recently the price of parts required to exceed about 600-640 cubic inches or 800-1000hp without power adders was very prohibitive and while its still easy for and engine build to cost well over $16K and 40K is hardly the limit, you can build a very respectable 700-1000hp BBC for under $20K and building a 650hp-700hp combo of 540-598 cubic inches is now basically ALMOST a bolt together deal with off the shelf components, or easily available in a semi custom built crate engine
Chevy V8 bore & stroke chart
I saw this online and figured I would post it..I am going to add the popular lsx strokers soon
CID BORE STROKE
262 = 3.671" x 3.10" (Gen. I, 5.7" rod)
265 = 3.750" x 3.00" ('55-'57 Gen.I, 5.7" rod)
265 = 3.750" x 3.00" ('94-'96 Gen.II, 4.3 liter V-8 "L99", 5.94" rod)
267 = 3.500" x 3.48" (Gen.I, 5.7" rod)
283 = 3.875" x 3.00" (Gen.I, 5.7" rod)
293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)
302 = 4.000" x 3.00" (Gen.I, 5.7" rod)
305 = 3.736" x 3.48" (Gen.I, 5.7" rod)
307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)
327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
345 = 3.893" x 3.622" ('97-later, Gen.III, "LS1", 6.098" rod)
350 = 4.000" x 3.48" (Gen.I, 5.7" rod)
350 = 4.000" x 3.48" ('96-'01, Gen. I, Vortec, 5.7" rod)
350 = 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)
364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)
376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)
383 = 4.000" x 3.80" ('00, "HT 383", Gen.I truck crate motor, 5.7" rod)
400 = 4.125" x 3.75" (Gen.I, 5.565" rod)
427 = 4.125" x 4.00" (2006 Gen.IV, LS7 SBC, titanium rods)
Two common, non-factory smallblock combinations:
377 = 4.155" x 3.48" (5.7" or 6.00" rod)
400 block and a 350 crank with "spacer" main bearings
383 = 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod)
350 block and a 400 crank, main bearing crank journals
cut to 350 size
ALL production big blocks used a 6.135" length rod.
CHEVY BIG BLOCK V-8 BORE AND STROKE
366T = 3.935" x 3.76"
396 = 4.096" x 3.76"
402 = 4.125" x 3.76"
427 = 4.250" x 3.76"
427T = 4.250" x 3.76"
454 = 4.250" x 4.00"
477= 4.5" bore x 3.76" stroke
496 = 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
502 = 4.466" x 4.00"
557T= 4.5 bore 4.375" stroke
572T = 4.560" x 4.375" (2003 "ZZ572" crate motors)
T = Tall Deck
ALL production big blocks used a 6.135" length rod.
related info
http://ohiocrank.com/enginespage1.html
http://www.hotrod.com/techarticles/hdrp ... ild_giant/
http://www.shafiroff.com/sportsman/540_860.asp
http://www.vortecproperformance.com/eng ... tions.html
viewtopic.php?f=87&t=5602&p=17105&hilit=tall+deck+intake#p17105
viewtopic.php?f=51&t=188&p=28633#p28633
viewtopic.php?f=53&t=3893&p=10308&hilit=tall+deck#p10308
viewtopic.php?f=53&t=9986&p=38689#p38689
viewtopic.php?f=51&t=3817&hilit=tall+deck
http://www.hotrod.com/techarticles/705c ... big_block/
viewtopic.php?f=51&t=2692&p=13225&hilit=11+deck+height#p13225
viewtopic.php?f=52&t=5729&p=17480&hilit=big+block+heads#p17480
viewtopic.php?f=87&t=951&p=3757&hilit=tall+deck#p3757
viewtopic.php?f=51&t=188&p=1634&hilit=tall+deck#p1634
http://www.hotrod.com/techarticles/engi ... te_engine/
http://www.dragzine.com/news/new-produc ... der-heads/
there are now aftermarket blocks with 11" plus deck heights and 5' bore spacing that will allow well over 700 plus inches of displacement, but cost escalates rapidly to the point where its no longer anything but a custom build engine that has little resemblance to the original engine dimensions or even vaguely similar in cost, to what can be purchased from chevy.
chevy now has a 572 cubic inch engine available that produces 720 hp in as delivered form,and with a few tweaks kicking it up past 800 hp hardly a challenge, for the more experienced engine builders. .
Id point out that the heads,intake design, cam type and duration and lift and compression ratio you select have a HUGE effect on how effectively you can use the larger displacement combos, without good components you will have a hard time effectively feeding the larger displacement engines
while theres always ways to increase horsepower and in many cases displacement up until fairly recently the price of parts required to exceed about 600-640 cubic inches or 800-1000hp without power adders was very prohibitive and while its still easy for and engine build to cost well over $16K and 40K is hardly the limit, you can build a very respectable 700-1000hp BBC for under $20K and building a 650hp-700hp combo of 540-598 cubic inches is now basically ALMOST a bolt together deal with off the shelf components, or easily available in a semi custom built crate engine
Chevy V8 bore & stroke chart
I saw this online and figured I would post it..I am going to add the popular lsx strokers soon
CID BORE STROKE
262 = 3.671" x 3.10" (Gen. I, 5.7" rod)
265 = 3.750" x 3.00" ('55-'57 Gen.I, 5.7" rod)
265 = 3.750" x 3.00" ('94-'96 Gen.II, 4.3 liter V-8 "L99", 5.94" rod)
267 = 3.500" x 3.48" (Gen.I, 5.7" rod)
283 = 3.875" x 3.00" (Gen.I, 5.7" rod)
293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)
302 = 4.000" x 3.00" (Gen.I, 5.7" rod)
305 = 3.736" x 3.48" (Gen.I, 5.7" rod)
307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)
327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
345 = 3.893" x 3.622" ('97-later, Gen.III, "LS1", 6.098" rod)
350 = 4.000" x 3.48" (Gen.I, 5.7" rod)
350 = 4.000" x 3.48" ('96-'01, Gen. I, Vortec, 5.7" rod)
350 = 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)
364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)
376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)
383 = 4.000" x 3.80" ('00, "HT 383", Gen.I truck crate motor, 5.7" rod)
400 = 4.125" x 3.75" (Gen.I, 5.565" rod)
427 = 4.125" x 4.00" (2006 Gen.IV, LS7 SBC, titanium rods)
Two common, non-factory smallblock combinations:
377 = 4.155" x 3.48" (5.7" or 6.00" rod)
400 block and a 350 crank with "spacer" main bearings
383 = 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod)
350 block and a 400 crank, main bearing crank journals
cut to 350 size
ALL production big blocks used a 6.135" length rod.
CHEVY BIG BLOCK V-8 BORE AND STROKE
366T = 3.935" x 3.76"
396 = 4.096" x 3.76"
402 = 4.125" x 3.76"
427 = 4.250" x 3.76"
427T = 4.250" x 3.76"
454 = 4.250" x 4.00"
477= 4.5" bore x 3.76" stroke
496 = 4.250" x 4.37" (2001 Vortec 8100, 8.1 liter)
502 = 4.466" x 4.00"
557T= 4.5 bore 4.375" stroke
572T = 4.560" x 4.375" (2003 "ZZ572" crate motors)
T = Tall Deck
ALL production big blocks used a 6.135" length rod.
related info
http://ohiocrank.com/enginespage1.html
http://www.hotrod.com/techarticles/hdrp ... ild_giant/
http://www.shafiroff.com/sportsman/540_860.asp
http://www.vortecproperformance.com/eng ... tions.html
viewtopic.php?f=87&t=5602&p=17105&hilit=tall+deck+intake#p17105
viewtopic.php?f=51&t=188&p=28633#p28633
viewtopic.php?f=53&t=3893&p=10308&hilit=tall+deck#p10308
viewtopic.php?f=53&t=9986&p=38689#p38689
viewtopic.php?f=51&t=3817&hilit=tall+deck
http://www.hotrod.com/techarticles/705c ... big_block/
viewtopic.php?f=51&t=2692&p=13225&hilit=11+deck+height#p13225
viewtopic.php?f=52&t=5729&p=17480&hilit=big+block+heads#p17480
viewtopic.php?f=87&t=951&p=3757&hilit=tall+deck#p3757
viewtopic.php?f=51&t=188&p=1634&hilit=tall+deck#p1634
http://www.hotrod.com/techarticles/engi ... te_engine/
http://www.dragzine.com/news/new-produc ... der-heads/
Last edited by a moderator: