Re: Building up a C263 gas engine...?

Posted by Sean Wetgen on November 09, 2006 at 21:19:37 from (204.77.166.193):

In Reply to: Re: Building up a C263 gas engine...? posted by the tractor vet on November 09, 2006 at 08:30:40:

So where can I get those special sleeves? Are they an M&W thing or pretty common? Most parts places, implement dealers and maybe the machinists might not know where to get them or even hear of them. Our guys here are dumb as to "tricking" out things. Wish I lived eleswhere but thats not going to change and make the best of what I got.
Pretty much on the kit, the sleeves and pistons will be different, but everything else is towards the 263. Pistons I can use the actuall 291"s? But not stock 291 sleeves. Think I have that part. I need to talk to our machinist in town, maybe has a general idea of what we"re talking about. He builds stock car engines and hobby stock, but I never had a motor done there before. So I don"t know for sure what he is cabable of doing. I still want this tractor for a good solid day of hard work. If I want to go out and plow for 14 hours or even if its on a elevator idling, I need it very dependable. I don"t like the idea of the 93+ octane as when the racers are done for the season race fuel is over. And as you say the alcohol leans the gas even if it shows 92 octane, that I knew. But mainly we have regular unleaded 87 oct here on the farm and it probably won"t change as the barrel is used for more things then the 706. So I still need the tractor to run on 87 fuel. Compression had alot to do with the rating of fuel to be used right? Think the stock CR of the 263 was around 7.5:1? Well what if I can keep it down around 8-9:1 will it still work or risk a meltdown? I have a formula somewhere on the calculation of CR. Something like the bore and stoke, total thinkness of the head gasket, and if the bolck is decked. But again its something the machinist might have in mind and know what to do. Again I need to find that out.

Is there a place I can go and find the specs on the cam so if mine needs rebuilding I got the specs I can get to have the building done? Not as easy as a v8 where most of the times they make new cams and lifters. The lifters are solid not hydraulic correct? Just trying to fully understand it all so I can explain it to the machinist when it comes time.

I might end up port and polishing the head. Only on the exhaust ports. Don"t think a guy wants it on the intake side as the roughness helps atomize the fuel/air mixture. New guides, valves, seats, springs, mill the head to true on the face and manifold sides. One thing I had in question yet is can the crank be offset ground to drop the pistons alittle more for the added stroke? Or is it close enough?

I had the motor getting warm to hot on me this summer. She was between the last line and the one before that. And pulling it was right by that last line. So new pump, thermostat and radiator boiling will take place. By the water getting out, the oil will thin more. I seen the 282 diesel had an oil cooler by the oil filter, I have the spin on housing, can I put the oil cooler on this gasser? I just don"t want things to get hot and ruin the motor after the build. Pry the biggest or heaviest things it will run are a 5 bottom plow, 18" field cultivator, and a grain vac on the 1000PTO. Other than that I use a 6" bush hog mainly, and other light duty jobs. I have an 886 with a 358 diesel to do the really HEAVY jobs, but wouldn"t mind having the 706 close to or match that diesel motor. But I suppose I wrote enough for now, until the next post.

Replies:

• Re: Building up a C263 gas engine...? the tractor vet 07:53:34 11/10/06 (0)
• Re: Building up a C263 gas engine...? the tractor vet 07:12:59 11/10/06 (0)

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