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How much does being BORED add to cu in?

  • Thread starter Thread starter IH8RICE2
  • Start date Start date Jun 9, 2006
I

IH8RICE2

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Aug 18, 2005
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Peachtree City
Jun 9, 2006
#1
  • Jun 9, 2006
  • #1
This isn't exactly mustang tech, but i can't think of a better place to ask. My dad and I are looking at a 68 chevelle with a 396 that's bored .60 over. My question is, how many cubic inches do ya'll think the motor is at now? Unless i'm being a total tard, i'm almost positive that boring adds to overall size. Thanks in advance guys.
 

hognutz

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Nov 12, 2002
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albany, oregon
Jun 9, 2006
#2
  • Jun 9, 2006
  • #2
yes incresing bore size does increase displacement. you engines stroke and the cylinder bore determin the engines displacement.

you could calculate it based on adding .060 to the stock bore size of a 396 and then throw in the stroke. you basically just have to calculate the volume of the cylinder and multiply by 8.

off the top of my head I do belive a .030 over 396 is a 402 so my guess would be 408ci.
 

four six

Member
Jan 19, 2006
506
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Hobart, IN
Jun 9, 2006
#3
  • Jun 9, 2006
  • #3
+1 for the 408 Ci
 

Malevolyn

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Dec 7, 2005
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Lakeland, FL
Jun 9, 2006
#4
  • Jun 9, 2006
  • #4
I'm pretty bored right now. Maybe my engine is a 5.4 as we speak!

Sorry, I had to.
 
S

Stang2003GT

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Jun 9, 2006
#5
  • Jun 9, 2006
  • #5
Stock Chevy 396: 4.096 x 3.76 * 8 = 396.36 ci^3

.30 over : 4.126 x 3.76 * 8 = 402.19 ci^3

.60 over : 4.156 x 3.76 = 408.06ci^3
 
F

frathouse

New Member
Apr 11, 2004
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Jun 9, 2006
#6
  • Jun 9, 2006
  • #6
Malevolyn said:
I'm pretty bored right now. Maybe my engine is a 5.4 as we speak!

Sorry, I had to.
Click to expand...


+1...

DAMN YOU! You said it faster than me lol
 
0

01Steeda

New Member
May 29, 2005
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Baton Rouge, LA
Jun 9, 2006
#7
  • Jun 9, 2006
  • #7
frathouse said:
+1...

DAMN YOU! You said it faster than me lol
Click to expand...


Yeah but as soon as ya jump in to take a ride your not bored anymore so back to 4.6L ya go
 

CanadaStang

New Member
Sep 7, 2003
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Mb
Jun 9, 2006
#8
  • Jun 9, 2006
  • #8
Stang2003GT said:
Stock Chevy 396: 4.096 x 3.76 * 8 = 396.36 ci^3

.30 over : 4.126 x 3.76 * 8 = 402.19 ci^3

.60 over : 4.156 x 3.76 = 408.06ci^3
Click to expand...


What he said ^






I guess
 
4

46gtsblown

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Jan 9, 2002
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Jun 9, 2006
#9
  • Jun 9, 2006
  • #9
The small amount of extra displacement is no reason to over bore your block.
The only reason to bore it is to rebuild it and return it to service.
BTW a 302 bored .30 over gives you a 306.

Dwayne
 

sgarlic

Founding Member
Apr 21, 2001
3,085
1
56
Jun 10, 2006
#10
  • Jun 10, 2006
  • #10
46gtsblown said:
The small amount of extra displacement is no reason to over bore your block.
The only reason to bore it is to rebuild it and return it to service.
Click to expand...

You don't really believe that, do you?
 
4

46gtsblown

Founding Member
Jan 9, 2002
278
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Jun 10, 2006
#11
  • Jun 10, 2006
  • #11
Why yes I do.
Do you really think that 6ci is going to make any real difference in power output?
If you do I have some swamp land to sell you.
 
0

01Steeda

New Member
May 29, 2005
732
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0
Baton Rouge, LA
Jun 10, 2006
#12
  • Jun 10, 2006
  • #12
46gtsblown said:
Why yes I do.
Do you really think that 6ci is going to make any real difference in power output?
If you do I have some swamp land to sell you.
Click to expand...


I'll buy it... big deer on swamp land ya know
 
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