Posted by The tractor vet on December 05, 2014 at 08:29:49 from (104.179.81.68):
In Reply to: Gas Tractors posted by prawn farmer on December 05, 2014 at 06:14:52:
Well Back in the day No they did not require the top shelf stuff as the lowest grade gas back in the 60's till the low lead fuels were put on the shelf was around 93 at the lowest and BACK in the DAY that stuff would make and old pick up ping . Now back in the fifty's as to what the octane was AT THE pump i am not sure as i was not driving back then all i can say about the mid fifty's is that my 56 Ford rag top with a 292 T/Bird special needed Ethel and she would plum scream when she wet down. Also back then i know that the 1957 B 60 Mack with the big Thermodine needed high test along with every other gas burning semi out there . I can tell ya that i use to get my gas for my old Ford at a little fuel stop for the trucks on the west side of the little village i lived in and the 105 octane gas was 16.9 cents a gallon In 64 i built a 390 Ford for my 61 Ford rag top and i ran 13.5 pistons in it and had to run no less the Sunoco 250 but most times it was the 260 or on the weekends it was one click past the 260 . Now as for when the last gas tractors were built was around 1975 . I can tell you this for a fact that if you try and WORK and i mean work a gas tractor today it is wise to run the good stuff if you want to call it good . (1) the new cylinder kits you buy today are NOT the same as when they were new , the pistons are NOT forged . They are cast they can not take the heat of lower grades of gas , they can not dissipate the heat like a Forged piston can to the skirts and to the cylinder walls . I know for a fact that the 87 octane burns way hotter then the 93 . and i know for a fact that sometimes ya don't get what you pay for at the pump. as case in point here as we have one of our 706 gassers down once again with a melted wiped out piston . This happened this summer where we were doing hay at a farm about 8 miles from home . 28 acres of hay on some of the nastiest ground you will ever want to put a tractor on . the 706 will mow with a 12 19 john Deere haybine rake it twice and still have enough fuel to make it back home on one tank of fuel-gas what ever , as long as nobody BORROWS some for there pleasure . Well even though the tractor was parked way back over the hill away from the road someone drove across the hill and helped themselfs to some free gas. My buddy went to rake and while checking the tractor over discovered that it was almost empty . Like i said we were 8 miles one way from the tank at the farm and only a mile from a local gas station . he said there was a couple three inches of gas left so he drove it down to the station and filled it with there HIGHTEST and he raked the twenty eight acres . When he was done he dropped the rake and hooked back on the haybine and headed to the next farm to mow , it is a little better but still hilly with one hill a little on the steep side and the hay was heavy . In heavy hay the haybine will even work the 806 and warm it up with pulling the hills . Well on the second round he was pulling a hill and he ate a piston out of it . seams that there 93 was only 89 . I will catch a lot of flack on this but i have been building engines a lot longer then most of you have been around i can look at pieces and part out of a failed engine and know what and why it failed . My buddy and i even went as far as to have gasoline tested at a lab to see what was brought to us and the lab chemist told me more about gas then i ever even thought about . He is the one that told me that the 87 burns fast and super hot for emission , There is a huge difference between a car - pick up engine verses a tractor and Med , heavy duty truck engine . A car - pick up engine is not working under full load at full power all the time and if it does it is for a brief moment , a med duty truck engine is working harder for longer and it may be the same cu. in. as what is in a car of pick up it sure is not the same as what they are . a working gas tractor gets really HOT , like when your plowing , yea i know who plows with a gas tractor today well here i am not sure as we stopped plowing with the gas tractors around 94 . But the 355 New Holland feed grinder grinding ear corn will make the High PRo glow on the manifold and muffler at night on the 706 also the haybine will put a glow to it and put a little red on the muffler . The fuel min. req. for your tractor engine is in the owners manual . I know for the I H line that for the tractors like the 460 -560 the higher reving 4 cylinder 89 is min. for the ones that came out after it was upped to 93 . This year i have had enough fuel related problems that i am sick of it . Like i told the last guy with his grain truck it will never DO WHAT IT USE TO and trying to find parts are a night mare . Parts prices are outrageous . But back to the gas thing myself i have gotten to the point that i really don't care what you want to run in YOUR tractors i will just wory about what i need to as for the most part most of you just play with your old tractors and don't have to worry about grinding feed or maken over four hundred acres of hay getting the corn planted so that ya can feed the cows . and do it with basically old junk. What i try and keep running is 4 S/MTA's (2) 400 gasser a Wd 45 (3) 706 gassers (2) 64 806's (1) 966 (2) 1066's (2) H's a 1850 oliver gas ,a 1950 son to be Cunnins repower a 1855 cummins repower a 2150 Cummins repower a 2255 one J D A one J D B , one J D 720 D and 6 skid steers and a hand full of trucks of OLD vintage that are nothing more then a pain in the drain. and the fuels of today are not the fuels of days gone by . A feww days ago one of my friends posted and add of a long gone car dealer and the add was for a new 69 Road Runner and his add stated he would sell you a brand new 69 Road Chicken for 2500 and some bucks and it came with a lot of shell we say goodies for the lets go play at the local track or back road . Today you would NOT run that car on the best PUMP gas of today as they were a 10.5 to one engine , yes i know my Road Chickens as that is what i was doing back then Wrenchen on them and i was thru each and every training session that was offered by Chrysler i was Certified on all MoPar high performance engines and knew all the tricks to make them go better then they came off the show room floor . We did a lot of fuel testing on who's gas did what . worked hand in hand with the factory and one Factory rep , there were only four of us at four different dealerships in our district . Got a offer to take over a Ford Drag club program and a lot more of the driving force (money ) . There i got to do things that was FUN getting to BUILD engines and get to run them on the dyno's and just see how far ya could take them before you made spare pieces and part. World of difference between and engine running 1550 -2350 Rpm for hours at a time and engine running 6 grand for maybe 14 seconds or 10 grand for 8 seconds , think about it 10 grand a MIN. for only 8 seconds , how many turns did the crank make , how many times did the pistons go up and down ?? Then ya come to a tractor engine that is working for what eight ten twelve hours running for all it is worth at lets just say 2100 Rpm .
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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