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  #1  
Old 03-17-2011, 10:18 AM
Battlewagon Battlewagon is offline
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Default What a difference .040 makes.
Well, I did the retorque on the K301 head yesterday and got the sheet metal back on the tractor. Finally got to try out the milled head in some high grass. WOW. I did not think it would make such a noticeable difference. It does, Before the decarbon and head swap I would have had to cut this section in 1st and slip the clutch so as to not bog down the engine. I was able to cut it in second and never slow down. Only time the rpms fell was when I hit an ant pile and they did not fall much.

I recommend if you pull the head for cleaning or to replace a head gasket, take the head to the machine shop and have them mill .040 off it. It will wake up the engine. Mine is starting better, throttle response has improved and it has more usable power. I cannot wait till I get the K321 done as I am doing pretty much all of the "Killer Kohler" mods to it. It should be a beast. Many thanks to David Kirk for that write up.
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  #2  
Old 03-17-2011, 11:11 AM
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JOHN SCHUTTE JOHN SCHUTTE is offline
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Battlewagon, that is great news!
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Old 03-17-2011, 11:38 AM
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That is awesome!
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Old 03-17-2011, 03:00 PM
bkeicks bkeicks is offline
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this is encouraging news for me too. I have had my K341 rebuilt to .020" over and the head milled but have not been able to use it yet.

quick question. are you now running regular or high test in the 301?
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Old 03-17-2011, 04:39 PM
Merk Merk is offline
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Quote:
by bkeicks
quick question. are you now running regular or high test in the 301?
I have a K241 with more than .040 off the head plus the block was deck. It runs 87 octane gas with no problems. This is pump gas....not Merk gas before someone makes the comment. It likes Merk real well too.


One thing I would caution.....spin motor over by hand to make sure you have valve clearance.
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Old 03-17-2011, 05:39 PM
Battlewagon Battlewagon is offline
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this is encouraging news for me too. I have had my K341 rebuilt to .020" over and the head milled but have not been able to use it yet.

quick question. are you now running regular or high test in the 301?
Just the 87 octane garbage 10% ethanol from the corner store.
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Old 03-18-2011, 11:38 AM
bkeicks bkeicks is offline
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I was wondering if the increased compression would cause problems but it sounds like the "cheaper" 87 octane will work fine.
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Old 03-20-2011, 04:16 PM
jo1429 jo1429 is offline
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Wouldn't the increase in compression put more strain on the connecting rod?
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Old 03-20-2011, 06:41 PM
Battlewagon Battlewagon is offline
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Wouldn't the increase in compression put more strain on the connecting rod?
Yes. How much, who knows? I am not worried about it. If I was gonna use the engine in competition running ungoverned I would replace the rod at least once a season. However, I will be running a governer in this motor. Most things you do to any engine to increase performance is gonna put more stress on the parts. If you build for performance you have to take into consideration the higher maintence schedule and pay closer attention to detail so you don't have premature parts failure. Basically it is the same things you would do on a stocker, just more often and with more care. It is all in what you as the owner wish to do. Kinda like with my rifle, I could buy factory ammo and kill deer just as dead as the ammo I load myself, but I require a different standard for myself than what would satisfy the next guy.
YMMV.
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