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Tractor Pulling Discussion Board

Re: porting tools........


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Posted by mlpankey on October 11, 2013 at 04:37:36 from (152.85.8.38):

In Reply to: Re: porting tools........ posted by foghorn on October 10, 2013 at 15:43:51:

Fogorn thats a good south alabama name . Lim has a good tn mountain name and is known for his math skills in figuring 5ths quarts pints and gallons . Lim decides he wants to hot rod a tractor he has been reading the hotrod magazines while in the outhouse . He remembers the test depression for a flow bench is 28 inches of water. He gets him some wire and makes a crude go no go gauge and realises the tractors port is smaller than the valve size of 1.5 inches . He remebers a neighbor saying he has a 1.5 inch drill bit so its lunch time. Lim goes into kitchen and while eating a piece of chocalate pie he starts scratching out some figures on a note pad . He takes the radius of 1.5 being .750 times it by itself again and gets .5625 times that by pie 3.14 while wiping the chocalte pie from his lips and gets 1.766 . Lim then takes the square root of 28 inches of water and gets 5.291 takes that times 4005 and gets a velocity of 21190.45. he takes his 1.766 and divides it by 144 for a square feet of .0122. he times it by the velocity of 21190.45 and gets 258.523 cfm . So he says hmmm if i get my port sixe to my valve size i can have a maximum flow of 258 cfm . He then goes to neighbor and ask to borrow drill bit the neighbor say shure but tells him its dull. Lim knows he can sharpen it on a bench grinder and can check the angle to maintain it by putting two nut flats together and the angle the bottom two flats give is close to the drill bit angle. So he tells the guy he will sharpen it for his use. Lim goes and gets it hung in the port and it breaks his fore arm so now the head will have to wait six weeks . During tha six weeks he stops on the mountain by a machine shop and they tell him a 1.5 end mill would be alot safer . Lim replies them are expensive ,the machinist replies probably not as expensive as the emergency room visit . Lim laughs and awiats healing up.


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