Bore and stroke of a 426 HEMI
#1719550
01/01/15 09:02 PM
01/01/15 09:02 PM
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Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx
OP
super stock
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OP
super stock
Joined: Jan 2008
Posts: 894
Connecticut, USA
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What is the bore and stroke of a factory HEMI 426??
1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,
MOPAR = Machines Of Performance And Racing!!
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Re: Bore and stroke of a 426 HEMI
[Re: sixty7gtx]
#1719551
01/01/15 09:13 PM
01/01/15 09:13 PM
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Anonymous
Unregistered
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Anonymous
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Re: Bore and stroke of a 426 HEMI
[Re: ]
#1719552
01/01/15 11:38 PM
01/01/15 11:38 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Be glad you didn't have to Google that! Chevy 427 is 4.25 x 3.76 Now for the numbers rats, what's the bore and stroke of a ford 427? Happy New Year! R. 
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Re: Bore and stroke of a 426 HEMI
[Re: dogdays]
#1719554
01/02/15 06:58 PM
01/02/15 06:58 PM
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Joined: Jun 2013
Posts: 870
Keizer, Oregon U.S.A.
elmor353
super stock
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super stock
Joined: Jun 2013
Posts: 870
Keizer, Oregon U.S.A.
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427 Ford FE block is 4.2328 bore x 3.784 stroke. 427 inch stroker in a 351 Windsor block is 4.040 bore x 4.170 stroke. Sorry, I couldn't help myself. I'm NOT a Ford guy, just a wiseguy. 
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Re: Bore and stroke of a 426 HEMI
[Re: elmor353]
#1719555
01/02/15 07:53 PM
01/02/15 07:53 PM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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You forgot the 428 and 429...and 421 and...
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Bore and stroke of a 426 HEMI
[Re: astjp2]
#1719556
01/02/15 11:07 PM
01/02/15 11:07 PM
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Joined: Jan 2008
Posts: 894
Connecticut, USA
sixty7gtx
OP
super stock
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OP
super stock
Joined: Jan 2008
Posts: 894
Connecticut, USA
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How about a stroke of 4.375, Would that be tall???
1967 Plymouth GTX,
1968 HEMI, 4 Spd. Super Bee,
2010 Chrysler 300 Touring,
MOPAR = Machines Of Performance And Racing!!
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Re: Bore and stroke of a 426 HEMI
[Re: sixty7gtx]
#1719559
02/01/15 09:14 PM
02/01/15 09:14 PM
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Joined: Aug 2003
Posts: 43,173
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,173
Bend,OR USA
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Quote:
How about a stroke of 4.375, Would that be tall???
In a SB Chevy, Ford ,AMC or Mopar it would be tall  In a V12 or V16 alison aircarft engine, not so much    BTW, I've built several motors using both 4.500 and 4.375 stroke in Mopar BB wedges and Hemi motors  The 526 C.I. (4.380 bore x 4.375 stroke) N/A wedge motor made 845 HP, the N/A 572 C.I.(4.500 x 4.500) wedge motor made 875 HP on race gas The blown street Hemi motor with the 4.375 stroke made 927 HP at 7300 RPM with 7 lbs of boost  Same motor made 1024 HP on race gas at 6500 RPM detonating with 12 lbs of boost 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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. bore x bore x stroke x .7854 (1/4 of Pi) x 8 (cyls). EDIT If you do happen to know either the bore or the stroke you can divide that number (bore x 2) or stroke and (8) and (0.7854), all (3) numbers into the eng size to get the unknown variable (the bore if you already know the stroke or the stroke if you already know the bore). if you know the stroke then take the square root of the final number you get for the bore number