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05-02-2006, 03:01 PM
| #11 |
| Senior Member  Join Date: Jun 2005
Posts: 2,756
  | CG i gotta ?? for ya, how do calculate the new cubic inch measure after boreing?
__________________ 99 suburban xlt 96 silverado 91 wrangler (my baby  )08 Honday shadow 750 (my mistress  ) |
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05-02-2006, 06:29 PM
| #12 |
| Senior Member  Join Date: Sep 2005 Location: ALABAMA
Posts: 3,370
| Do a quick search on the net. It saves a lengthy explination. I just know from history. A 350 .30 over is a 353, .40 is a 355, and .60 is a 358. With 400 crank you simply add 30 to the total. It is not exact, you drop everything after the decimal, but it is gets you a realistic figure
__________________ Friends dont let friends use body lifts USMC 92-96 USCG 98 to present |
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05-03-2006, 06:03 PM
| #13 |
| Senior Member  Join Date: Dec 2005 Location: Texas
Posts: 172
| Cubic Inch Displacement (CID) = 3.14159(pi) ∙ radius of the cylinder squared (r^2) ∙ stroke ∙ # of cylinders. or area of a cylinder ∙ # of cylinders. |
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05-03-2006, 06:10 PM
| #14 |
| Senior Member Join Date: Sep 2005 Location: ALABAMA
Posts: 3,370
| And there it is.
__________________ Friends dont let friends use body lifts USMC 92-96 USCG 98 to present |
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05-03-2006, 07:05 PM
| #15 |
| Senior Member Join Date: Jun 2005
Posts: 2,756
| so, the area of the cylinder is CI/# of cylinders?
__________________ 99 suburban xlt 96 silverado 91 wrangler (my baby )08 Honday shadow 750 (my mistress ) |
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05-04-2006, 05:04 PM
| #16 |
| Senior Member Join Date: Dec 2005 Location: Texas
Posts: 172
| Kinda. Like CG said, they (manufacturers) round off to the nearest number(i.e. a 350 is really a 348-9 or 327 was really a 326). Best way to get the area of a cylinder is pi(3.14159)∙r^2∙stroke(height). How about converting CID to Liters? That is another thread some other time. |
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05-04-2006, 09:41 PM
| #17 |
| Senior Member Join Date: Jun 2005
Posts: 2,756
| CID/61 = liters believe.....
__________________ 99 suburban xlt 96 silverado 91 wrangler (my baby )08 Honday shadow 750 (my mistress ) |
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05-08-2006, 06:14 PM
| #18 |
| Senior Member Join Date: Dec 2005 Location: Texas
Posts: 172
| Yes. CID/61 gets you close enough, after all this isn't rocket science. |
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05-09-2006, 03:11 PM
| #19 |
| Full Member Join Date: Aug 2005
Posts: 43
|  14.8!!!!!! ok first i tryed acetone dident work then i replaced the oxygen sensor my next tank around 15mpg i thought it was a fluke so i tryed again again around 15 the most recent tank 14.8 i did the math oh and by the way 40 over is not 355 30 over is a 355 40 over is i believe a 356.8 or something like that anyway thanks for all the help i seriously recomend replacing the o2 sensor if you have 60k on your old one! |
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