Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List mel, thanks for this link, i looked at it too, i hope you don't mind? - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List thanks for the link!!! - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Cubic Inches
If you have Excel, I can send you my spreadsheet if you like; it's about 50K raw or 12K zipped. Anyone, Email me offline and tell me your preference. Dale [EMAIL PROTECTED] -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED]Sent: Thursday, January 31, 2002 1:47 PMTo: [EMAIL PROTECTED]Subject: Re: [Chevelle-List] Cubic InchesDale: is there a site I can mark for all the formulas or this stuff (lol) I need to keep in my head? Larry
RE: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List > > I have a calculation page at > http://www.ucalgary.ca/~csimpson/Tech/Calculations.html that does this > for you. <- shameless plug Shame - shame! LOL. I have a simple spreadsheet with all kinds of calculations; cubic inches, liters, rear gear/tire diameter/mph, torque to hp, A/N fittings, carb requirements, hp required, electrical stuff...every time I find some calculation I need I add it. Great time saver. > > A 396 cubic inch engine running at 6,000 rpm should require 396 * 6,000 > / 2 or 1,188,000 cubic inches of air per minute. Where a cubic foot is > 12 * 12 * 12 or 1,728 cubic inches 1,188,000 ci/m would be 687 cubic > feet per minute. Compare that to your carburetor size. Interesting. I found a formula (probably from an old car mag) that gives the same results. They did say however that no internal combustion engine will ever achieve 100% volumetric efficiency (VE) - as I'm sure we'd all agree. They plug in a factor of 0.85 for a maximum, realistic VE. This brings the 396 down to "requiring" only 585 CFM to get the job done. I've always wondered why a 750 or 850 or whatever always seemed to run better though. Probably has a lot to do with physics and, come to think of it, don't really care that much :*) Good topic for bench racing though. Dale - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List In a message dated 01/31/2002 7:55:49 AM Eastern Standard Time, [EMAIL PROTECTED] writes: > I think it's bore x bore x stroke x #cyl x .7854 (instead of .7894)? That's > what I've always used. A 396 +.060 is 408.3 cubes - I have the same engine. > BTW, if you take cid times 0.01639, you get your engine size in liters. > > Dale Correct. It is just the volume of all the cylinders. Total cu in => number of cylinders * volume of one cylinder we know: volume of a cylinder = area of the base circle of cylinder * height of the cylinder area of circle = PI * R * R (where R is the radius of circle in inches) R = bore / 2 (inches) stroke = height of the cylinder (inches) so: Total cu in = ( PI * R * R ) * cyl height * # cyl = ( PI * (bore/2) * (bore/2)) * stroke * # cyl = ( PI / 4 * bore * bore) * stroke * # cyl = .7854 * bore * bore * stroke * # cyl So the .7854 is just PI / 4. Ain't math great? B-) - Kurt Ehrhardt ACES #1280 66 Malibu 66 SuperSport Enfield, CT - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
RE: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List Thanks. I figured Chevy must have had a 1:1 car. It seemed like "the thing to do" at the time. John Nasta Old Car Network http://oldcarnetwork.com -Original Message- That would be the 1957 fuel-injected Corvette...283 w/283HP. Emil Dusek John Nasta wrote: > > Not sure if Chevy released a 1:1 car to the public during that time. > - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Thank you Mel! Appreciate all the answers :) Larry
Re: [Chevelle-List] Cubic Inches
john: chevy did it with the 57 corvette (then the other chevs) 283/283 HP fuel injection model. the 1956 Chrysler 300-b was the first but only if fitted with the rare optional engine and the chevys was readily available, Larry
Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List That would be the 1957 fuel-injected Corvette...283 w/283HP. Emil Dusek John Nasta wrote: > > Not sure if Chevy released a 1:1 car to the public during that time. > > John Nasta > Old Car Network > http://oldcarnetwork.com > - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
thank you john Larry
RE: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List << Is 1 hp per ci acceptable for a street car or is that pushing it? >> In 1957 Chrysler introduced their first 1:1 car ( 1HP per CI) with the Chrysler 300. In 1962 Olds released their first 1:1 car with the turbo-charged Jetfire. Not sure if Chevy released a 1:1 car to the public during that time. John Nasta Old Car Network http://oldcarnetwork.com - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Larry try this site .it's pretty good . http://www.smokemup.com/utilities/calc.cfm Mel 67 Mlibu SS - Original Message - From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 11:47 AM Subject: Re: [Chevelle-List] Cubic Inches Dale: is there a site I can mark for all the formulas or this stuff (lol) I need to keep in my head? Larry
RE: [Chevelle-List] Cubic Inches
http://www.prestage.com/carmath/ -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED]Sent: Thursday, January 31, 2002 11:47 AMTo: [EMAIL PROTECTED]Subject: Re: [Chevelle-List] Cubic InchesDale: is there a site I can mark for all the formulas or this stuff (lol) I need to keep in my head? Larry
Re: [Chevelle-List] Cubic Inches
thanks cliff Larry
Re: [Chevelle-List] Cubic Inches
Dale: is there a site I can mark for all the formulas or this stuff (lol) I need to keep in my head? Larry
Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List > How do you calculate the cubic inches of an engine? Displacement - the total volume of air and fuel that an engine is theoretically capable of drawing into all its cylinders in one cycle. It's calculated as the volume of a cylinder multiplied by the number of cylinders. The confusing part is calculating the volume uses the area of a circle which requires the radius not the bore (bore = 2 * radius). That is to say: pi-r-squared (calculate the area of a circle where bore/2 is r) x stroke (just like calculating the volume of a cylinder where the stroke is the height) x the number of cylinders. So it's the (bore/2)^2 * stroke * pi * #cylinders. Of course Herb and Dale are correct that it can be simplified to bore * bore * pi/4 * stroke * #cylinders :) I have a calculation page at http://www.ucalgary.ca/~csimpson/Tech/Calculations.html that does this for you. <- shameless plug > For example, if I wanted to bore my 396 a total of .060 over, what > would the cubic inches be? (4.096/2) * (4.096/2) * 3.1415926535 * 3.76 * 8 = 396 ci (4.156/2) * (4.156/2) * 3.1415926535 * 3.76 * 8 = 408 ci Now for the unasked questions. Note: a cycle is 2 revolutions of the crankshaft of a four stroke engine. Right? One revolution is intake and compression while the second is power and exhaust. So you should be sucking in about displacement / 2 * rpms per minute. A 396 cubic inch engine running at 6,000 rpm should require 396 * 6,000 / 2 or 1,188,000 cubic inches of air per minute. Where a cubic foot is 12 * 12 * 12 or 1,728 cubic inches 1,188,000 ci/m would be 687 cubic feet per minute. Compare that to your carburetor size. Note that this does not factor in the efficiency of the motor or the definition of carburetor cubic feet per minute. -- Cliff "Always more than you wanted to know." Simpson http://www.acs.ucalgary.ca/~csimpson/ - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Replies to this message are sent to The Chevelle Mailing List In a message dated 1/31/02 11:34:17 AM Eastern Standard Time, [EMAIL PROTECTED] writes: << Is 1 hp per ci acceptable for a street car or is that pushing it? >> Of course it is :). the 454 in my 70 has a tad more than 1 HP pre CI bringing the total HP to 500 Tom - To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
Re: [Chevelle-List] Cubic Inches
Thanks guys for the cubic inch and liter info. Is 1 hp per ci acceptable for a street car or is that pushing it? later, lojac - Original Message - From: 396guy To: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 7:53 AM Subject: RE: [Chevelle-List] Cubic Inches I think it's bore x bore x stroke x #cyl x .7854 (instead of .7894)? That's what I've always used. A 396 +.060 is 408.3 cubes - I have the same engine. BTW, if you take cid times 0.01639, you get your engine size in liters. Dale -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Herbert LumppSent: Thursday, January 31, 2002 4:54 AMTo: [EMAIL PROTECTED]Subject: Re: [Chevelle-List] Cubic Inches Bore x bore x stroke x # of cylinders x .7894 = CID Don't ask me why I know that, but it's one of those things I learned as a kid and never forgot. cYa- Herb Lumpp1966 El CaminoACES #3509http://web.tampabay.rr.com/herbsworld/index.htm - Original Message - From: Lojac To: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 1:28 AM Subject: [Chevelle-List] Cubic Inches How do you calculate the cubic inches of an engine? For example, if I wanted to bore my 396 a total of .060 over, what would the cubic inches be? Please explain how you came to that number tooplease. Thanks, Lojac
Re: [Chevelle-List] Cubic Inches
You're right, .7854, just a typo.
That's what I get for making fun of someone else's typo!
Another way to compare engine
displacement: 1000 cc = 60 ci = 1 liter.
cYa-
Herb
- Original Message -
From:
396guy
To: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 7:53
AM
Subject: RE: [Chevelle-List] Cubic
Inches
I think it's bore x bore x stroke x #cyl x .7854
(instead of .7894)? That's what I've always used. A 396 +.060 is
408.3 cubes - I have the same engine. BTW, if you take cid times
0.01639, you get your engine size in liters.
Dale
-Original Message-From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Herbert
LumppSent: Thursday, January 31, 2002 4:54 AMTo:
[EMAIL PROTECTED]Subject: Re: [Chevelle-List] Cubic
Inches
Bore x bore x stroke x # of cylinders x
.7894 = CID
Don't ask me why I know that, but it's
one of those things I learned as a kid and never forgot.
cYa-
Herb Lumpp1966 El CaminoACES #3509http://web.tampabay.rr.com/herbsworld/index.htm
- Original Message -
From:
Lojac
To: [EMAIL PROTECTED]
Sent: Thursday, January 31, 2002 1:28
AM
Subject: [Chevelle-List] Cubic
Inches
How do you calculate the
cubic inches of an engine? For example, if I wanted to bore my 396 a
total of .060 over, what would the cubic inches be? Please explain
how you came to that number tooplease.
Thanks,
Lojac
RE: [Chevelle-List] Cubic Inches
I think it's bore x bore x stroke x #cyl x .7854 (instead of .7894)? That's what I've always used. A 396 +.060 is 408.3 cubes - I have the same engine. BTW, if you take cid times 0.01639, you get your engine size in liters. Dale -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Herbert LumppSent: Thursday, January 31, 2002 4:54 AMTo: [EMAIL PROTECTED]Subject: Re: [Chevelle-List] Cubic Inches Bore x bore x stroke x # of cylinders x .7894 = CID Don't ask me why I know that, but it's one of those things I learned as a kid and never forgot. cYa- Herb Lumpp1966 El CaminoACES #3509http://web.tampabay.rr.com/herbsworld/index.htm - Original Message - From: Lojac To: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 1:28 AM Subject: [Chevelle-List] Cubic Inches How do you calculate the cubic inches of an engine? For example, if I wanted to bore my 396 a total of .060 over, what would the cubic inches be? Please explain how you came to that number tooplease. Thanks, Lojac
Re: [Chevelle-List] Cubic Inches
Bore x bore x stroke x # of cylinders x .7894 = CID Don't ask me why I know that, but it's one of those things I learned as a kid and never forgot. cYa- Herb Lumpp1966 El CaminoACES #3509http://web.tampabay.rr.com/herbsworld/index.htm - Original Message - From: Lojac To: [EMAIL PROTECTED] Sent: Thursday, January 31, 2002 1:28 AM Subject: [Chevelle-List] Cubic Inches How do you calculate the cubic inches of an engine? For example, if I wanted to bore my 396 a total of .060 over, what would the cubic inches be? Please explain how you came to that number tooplease. Thanks, Lojac
