
Sponsored Links  
Advertisement




The formula is Pi X the radius squared Time the stroke Xnumber of cylinders
so on a 350 chevy 3.1417 X 4 X 3.48 X8 = 349859 Hope this helps Chet 




Quote:
http://www.csgnetwork.com/cubicinchdispcalc.html 


formula for displacement
(BORE)X(BORE)X(STROKE)X(.7854)X(NUMBER OF CYLINDERS)
EXAMPLE: 4x4 x 3.48 x .7854 x 8= 349.848576 round up 350ci I've never heard the one using PIE, but it looks like it works... I just find this one a little more simple.. Danny 


Quote:



.7854
I dunno, Some guy smarter then me. I just know it works and It's easier for me. If I works I don't question it.
If u got a gonkulator handy you can check it. It will be accurate every time. It came outta one of my books, Prolly David Vizard... I don't think any of us have a need to question him. just try it. 383ci: bore is 4.030", stroke is 3.75" 406ci: bore 4.155" stroke 3.75" 434ci: bore " " 4.00" 302 : bore 4" stroke 3" 


Quote:
The second number is the radius squared. The radius of a circle is 1/2 the diameter, in this case, 1/2 the bore. The stock bore of a 350 engine is 4.0 so 1/2 of the stock bore is 2 and 2 squared is 2 times itself or 2x2 which is 4. Terry 


Pi is actully 3.141592654.. it does continue, but no calculator can count that high. if you used 3.1417 the displacement would be off a little, it would be more accurate to use 3.14 only.



Quote:
Pi/4 =0.7853982 

Recent Engine posts with photos 
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)  
Thread Tools  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
crate chevy 302?  Vancouver Grand Prix  Hotrodders' Lounge  106  12312012 04:05 PM 
Chev 4.3Liter Bore size.. and chev 305 or 350 bore  boneyard Buick  Engine  9  08082006 10:55 PM 
engine size  stairchallenged  Engine  3  01252005 08:48 PM 
Ford Engine size  Rancher  Engine  6  11232003 12:45 AM 
Ford Engine Sizes  bigjoedo  Engine  1  01312002 04:05 PM 