how do you figure engine displacement from bore and stroke?
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From: Beyond Hope
Stroke x Bore(squared) x 0.7854 x # of cyls.
3.75 x (4.030x4.030) x 0.7854 x 8 = 382.668 or 383
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1993 C1500 Indy 500 Edition
1992 TA TPI setup
Stock motor, new one being built now.
www.geocities.com/wsleigh
[This message has been edited by 93ND500 (edited March 13, 2001).]
3.75 x (4.030x4.030) x 0.7854 x 8 = 382.668 or 383
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1993 C1500 Indy 500 Edition
1992 TA TPI setup
Stock motor, new one being built now.
www.geocities.com/wsleigh
[This message has been edited by 93ND500 (edited March 13, 2001).]
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That's pretty cool. I would have figured it with 8x[(pi)x((bore/2)squared)x(stroke)]. Works out exactly the same either way. I've just never seen volume of a cyl. calculated without pi. I must have had some slack teachers over the years.
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From: Orange, SoCal
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Pi is already factored in as part of that 0.7854 number. 
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From: Loveland, OH, US
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93 cheated...
.7854 = pi / 4
quick shortcut
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.7854 = pi / 4
quick shortcut
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"So many Mustangs, so little time..."
ICON Motorsports
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Joined: Jan 2001
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From: Beyond Hope
It's not cheating 
.....I've done my homework, studied my butt off, passed my test, earned my degree. Now I call it "Problem Solving via Creative Solutions". 
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1993 C1500 Indy 500 Edition
1992 TA TPI setup
Stock motor, new one being built now.
www.geocities.com/wsleigh
[This message has been edited by 93ND500 (edited March 15, 2001).]
.....I've done my homework, studied my butt off, passed my test, earned my degree. Now I call it "Problem Solving via Creative Solutions". ------------------
1993 C1500 Indy 500 Edition
1992 TA TPI setup
Stock motor, new one being built now.
www.geocities.com/wsleigh
[This message has been edited by 93ND500 (edited March 15, 2001).]
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From: Tennessee
Right, I just write a Matlab program for everything so I never have to remember the formula or calculate anything again. Works wonders for figuring the area of a square too 
.
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Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
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thick rubber floormats, towels in the seats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."
. ------------------
1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Ruger P95DC, hot wife, new oil filter,
thick rubber floormats, towels in the seats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."
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From: New Orleans
Nothing wrong with pi/4. I shoulda caught that on my own. But then i was in the middle of my homework/studying/trying to get my degree so I was a bit distracted.
Matlab sucks (not really, but my numerical methods professor did)
Thanks for putting up with the lowly GT student guys.
Later
Matlab sucks (not really, but my numerical methods professor did)
Thanks for putting up with the lowly GT student guys.
Later
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From: Loveland, OH, US
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pi = 3.14159265359 etc.
Your # is 3-1/7 which isn't quite the same thing.
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Your # is 3-1/7 which isn't quite the same thing.
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"So many Mustangs, so little time..."
ICON Motorsports
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From: Ft. Worth, TX
<font face="Verdana, Arial" size="2">Originally posted by 93ND500:
Stroke x Bore(squared) x 0.7854 x # of cyls.
3.75 x (4.030x4.030) x 0.7854 x 8 = 382.668 or 383
</font>
Stroke x Bore(squared) x 0.7854 x # of cyls.
3.75 x (4.030x4.030) x 0.7854 x 8 = 382.668 or 383
</font>
a little closer to 383
OK OK I'm bored.
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From: Ft. Worth, TX
<font face="Verdana, Arial" size="2">Originally posted by RB83L69:
pi = 3.14159265359 etc.
Your # is 3-1/7 which isn't quite the same thing.
</font>
pi = 3.14159265359 etc.
Your # is 3-1/7 which isn't quite the same thing.
</font>
Maybe I'm wrong.
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From: Ft. Worth, TX
<font face="Verdana, Arial" size="2">Originally posted by Tab92bird:
pi is a repeating decimal, so 22/7 isn't exactly pi; it's just the closest fraction to it.</font>
pi is a repeating decimal, so 22/7 isn't exactly pi; it's just the closest fraction to it.</font>
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From: Loveland, OH, US
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3-1/7 == 22/7 on my planet
At least we're not still stuck in 1920's "creation science", where during the anti-scientific backlash following the famous "Monkey Trial", in one state which shall remain nameless to protect the guilty, pi was declared by legislative fiat to be exactly 3. No other value was legally allowed to be used within the borders of that state because somewhere back in the Old Testament it says something about a wagon wheel moving about 3 times as far as it is across each time it turns once, which of course is the definition of pi. So for a couple of years, until somebody with common sense managed to convince the practioners of oxymoron education otherwise, basically nothing round could be built within that state that required any engineering
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"So many Mustangs, so little time..."
ICON Motorsports
At least we're not still stuck in 1920's "creation science", where during the anti-scientific backlash following the famous "Monkey Trial", in one state which shall remain nameless to protect the guilty, pi was declared by legislative fiat to be exactly 3. No other value was legally allowed to be used within the borders of that state because somewhere back in the Old Testament it says something about a wagon wheel moving about 3 times as far as it is across each time it turns once, which of course is the definition of pi. So for a couple of years, until somebody with common sense managed to convince the practioners of oxymoron education otherwise, basically nothing round could be built within that state that required any engineering
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"So many Mustangs, so little time..."
ICON Motorsports
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