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11-04-2010, 12:49 AM
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#1 |
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Account Suspended
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
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How to tell the diffence in engine size????
Other than running the numbers which I know is probably the easiest way, but what other ways are there to tell the difference between a 350 and a 400?
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11-04-2010, 10:39 AM
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#2 |
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Account Suspended
Join Date: Sep 2010
Location: hingham ma
Posts: 1,721
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Re: How to tell the diffence in engine size????
pull the pan. strokes longer on a 400.
later engines have it cast in the block in liters.. Last edited by stich626; 11-04-2010 at 10:39 AM. |
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11-04-2010, 10:49 AM
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#3 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: How to tell the diffence in engine size????
A 400 harmonic balancer will have an indention in the outer part that is a couple of inches long.
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11-04-2010, 12:12 PM
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#4 |
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Old Skool Club
 
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: How to tell the diffence in engine size????
Aren't there steam holes between the bores in the block on a 400? This is in comparison to a "smaller" small block.
__________________
Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. |
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11-04-2010, 12:41 PM
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#5 |
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Registered User
Join Date: Jun 2006
Location: Indiana
Posts: 4,859
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Re: How to tell the diffence in engine size????
Steam holes are in the heads. If you can see the steam holes, you can see the 4.125" bores too. Kinda hard to see those from the outside though.
__________________
'70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60 |
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11-04-2010, 03:01 PM
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#6 | |
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Account Suspended
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
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Re: How to tell the diffence in engine size????
Quote:
What exactly do you mean by "steam holes"? |
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11-04-2010, 03:03 PM
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#7 |
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More Cowbell....
Join Date: Mar 2004
Location: Puckett, MS
Posts: 3,569
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Re: How to tell the diffence in engine size????
Just put your foot in it. You might 'feel' the additional cubes. (okay...I really don't know)
__________________
There once was a member from Puckett.....Who ( fill in the blank blank blank ) bucket |
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11-04-2010, 03:06 PM
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#8 |
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Account Suspended
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
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Re: How to tell the diffence in engine size????
Ha-Ha to bad the engine is out. I don't have a current pick-up of the many I have that doesn't have a motor
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11-04-2010, 04:16 PM
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#9 |
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Registered User
Join Date: Aug 2008
Location: Pittsburg, KS
Posts: 2,466
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Re: How to tell the diffence in engine size????
Look at the flexplate/balancer. A 350 sbc is internal balance & 400 sbc is external balance. The 400 will have a counter weight on the balancer and flexplate.
__________________
Doug Looking for a 67-72 short bed driver..... Last edited by m6z; 11-04-2010 at 04:17 PM. |
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11-04-2010, 04:53 PM
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#10 | |
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Big Red - Now its a SWB!
Join Date: Jun 2009
Location: Oroville, Ca
Posts: 1,624
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Re: How to tell the diffence in engine size????
Quote:
__________________
68 3/4 ton  (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread41 3/4 ton (wife's)-flatbed, fully restored to original01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's |
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11-05-2010, 08:00 AM
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#11 |
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Registered User
Join Date: Jan 2008
Location: St.Petersburg,Fl
Posts: 1,267
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Re: How to tell the diffence in engine size????
400's have three freeze plugs in the side of the block. Some only have two, but there is a boss in the middle where the third one would have been. Casting numbers ending in 511, 509, and 817 are also indicators, besides the balancer with a notch, and flexplate with an external weight.
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11-05-2010, 08:41 AM
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#12 | |
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454 MAKES IT ROAR
Join Date: Jan 2008
Location: Essex, U.K
Posts: 2,701
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Re: How to tell the diffence in engine size????
Quote:
__________________
Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger |
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11-05-2010, 09:47 AM
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#13 | |
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Registered User
Join Date: Oct 2010
Location: Buckeye Arizona
Posts: 470
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Re: How to tell the diffence in engine size????
Quote:
you stole my answer! (: |
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