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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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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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Originally Posted by bkeicks View Post
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 03-18-2011, 01:40 PM
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IAfarmer IAfarmer is offline
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You'll gain more from the E10 with higher compression. Might even consider E85!
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Old 03-20-2011, 03:13 AM
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william1041200 william1041200 is offline
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I always take off .060 from my heads. Every engine I get has been overheated from gunk buildup in air fins everywhere. Amazing how these things still ran- Just look at how many of us love them and stand by them. But taking the time to clean it all up and shave the head, install a new head gasket ... What an insane difference it makes!
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Old 03-20-2011, 09:41 AM
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Matt G. Matt G. is offline
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Just a thought for you guys that are taking .040" and .060" off of your heads...if it warps again, how much material do you have left to clean up/flatten the surface before the valves no longer clear the head? Take too much off, and the head will no longer be usable if it warps again.
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