Re: M engine - How would you build it?

Posted by the tractor vet on August 08, 2007 at 19:52:28 from (75.19.124.211):

In Reply to: Re: M engine - How would you build it? posted by City-Boy McCoy on August 08, 2007 at 14:20:44:

Now you may think i am a spring chicken But i have been around for a couple days and i know just a littel bit about gas alkehol and nitro fuels , And when i pull and engine down and see damage to pistons i can tell ya what cause it or if and engione comes unglued i can look at the pices and parts and tell ya what let go first . Now as far as the gas of today this 87 octain is not what ya want to running in tractors and if i had a way of showen ya just what it will do to a piston i would as the piston in question is setting next to me and this is not the first one of them . And like i said before i have spent the money plus the trip to the LAB to have the gas tested and here again if i had a way to post the LAB results on the burn of 87 octain gas and just how hot it goes above what is as i would say safe for a tractor piston OF TODAY as the pistons that you get today are NOT of the FORGED design they are just a plain old cheap cast piston and a cast piston can not get ride of the heat like the old FORGED piston can . AND when the tractors were new they came with FORGED pistons . THe 87 octain is made to burn extra hot and fast . Heck way back in the late 50's the old gas powered semi's ran HIGH TEST and they were only 7-7.5 to 1 comp . While i had the shop open i saw a lot of gas tractors with problems as around here there are still alot of old gassers still in the field and MOST of them it was fuel related problems . SOOOOO we started doing some seirous work on tryen to get them to operate wright . Lots of the problems were because of one fuel supplyer as he would haul a load of diesel or home heating oil in the morning and that afternoon he would load the tank with gas ontop of what ever was left in the tank and hose and make his rounds . One day i had a small farmer bring his Ford 641 in for a tune up , well as i was bringing his tractor into the shop it ran out of gas , so being the nice guy that at times i can be i put ten gallon in it well what i had there was hightest did the major tune up including valve adjustment rebuild the carb checked the dist out on the strobe and set the points while on the strobe had it running like a swiss watch . He stops by that evening and pays his bill and drives the tractor home about two miles , two days later he is up at the shop just motheren me because his tractor will not start so we drive down to his place and yep it will not start pull the plugs out and they look like they were dipped in old motor oil . So go to the truck get a new set of plugs and install them , the tractor started real hard and smoked as bad as my old 450 D under load . Thought that maybe the float on the carb may have stuck nope thats not it . Well we got talken and questioned him as what all he did after he picked up the tractor . Welll from the time that he picked it up he ran it TILL it ran out of fuel the 10 that i put in , he then went to HIS tank and filled it up and that is when his problems started . SO we go to his tank and get a coffee can and fill it up half way set it out in the middel of the yard and throw a match into it . NOw if that had been good gas what do you think SHOULD have happened . Well the match went out it took a propane tourch to get this stuff to lite and it burned like a smudgpot . This was one of the problems that we had to contend with then we also found out that the 93 octain ran alot better in the rest of the gassers that WORKED for a living less plug problems ran cooler pulled better . Then ya get into the later gassers and here one SHOULD READ THE OPERATOR manual as to FUEL requirements for said tractor . There is a 460 gasser that has been on the same farm since new and runs everyday if ya run 93 octain gas in it , put 87 in it and it will haul the spreader down the field BUT it will not bring it back up with half a load on it in soft fields she will start seezen pistons and just plum stop till she cools down put the 93 in her and ya can put the 4 bottoms on her and work her all day and into the night . That was one of them jobs that had alot to do with the lack of hair on top of my head . The local I H store head wrench gave up on tryen to make that tractor run , then John Boy came to me and it took me a couple days to figure that one out . Like i said we still have a lot of old M's thru 806 gasser running over here . And ya have to keep in mind the big companys don't care about the littel guy or his problems with there products as thay got your money anyway . And gas is for cars not tractors . So if ya doubt me on this then why don't you buy a brand new 1 gallon gas can fill it with your 87 octain gas and hand deliver it to a indepedent lab along with about 7-800 buck and have it tested and see what happens in the burn and have the chemist explain to you what is going on and why . Lot of differance between running a car down the road at highway speeds then DRAGGEN SOME PICE OF EQUIPMENT down the field . And ya also have to take into account that this stuff is how old and how many times it has had the head milled down or the deck of the block milled then are you 100% sure that the comp. distance on that piston is correct or are you sure that your dist is working the way it should and what is the total advance on it has it been change is it the correct dist. for that engine ? Just how many of you have or know how to run a dist. strobe or change the curve on a dist . How many of ya just stuff a set of points in and never check timing ? How many time on here have you seen where guys are going to this or that and realy have know idea what they are doing but there going to dive in head first then they are back on here wanting to get the spec's as they don't even have a book . How many have had any kind of tech schooling , now i know there are a lot of guys that may be collage smart and now want to play they may have a masters in there field well maybe i never went to collage but with over 44 years of twisten wrenches building engines from mild to wild in gas and diesel i can hold my owen with the best. So as far as the school of hard knocks i have a Phd. along with a bunch of paper to cover a couple walls from Ford and Chry. and all that i have learned about I H's has come the hard way by doing it and figuren it out along with having the tools and equipment to work with.

Replies:

• Re: M engine - How would you build it? City-Boy McCoy 15:44:46 08/09/07 (0)
• Re: M engine - How would you build it? georgeky 20:36:17 08/08/07 (1)
  • Re: M engine - How would you build it? the tractor vet 07:07:17 08/09/07 (0)

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