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Farmall A cylinder head


 
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corvairman
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PostPosted: Sat Dec 28, 2019 5:55 pm    Post subject: Farmall A cylinder head Reply to specific post Reply with quote

I'm trying to restore a Farmall A that was partially disasemmbled (they left the head off for a few years parked outside, but luckily they also left the oil drain plug out). I have a few heads, some of which are probably original Farmall A heads (casting #6716DB), and I also have a higher compression head 366208-R1 which is obviously much higher compression but I don't know what it is off of. It also has longer valves (5.285" OAL), the valve part numbers are 366303-R1 and 366302-R1. My best guess is it is a 240 head? I'm re-sleeving the engine to 3.125" bore, and I'm thinking that if I put the high compression head on with a 240 governor spring (for higher RPM) it will take the horsepower from 18ish to 28ish. The question I have is will this work effectively with the thermosiphon cooling system? There is substantially less water space inside the head.
 
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gene bender
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PostPosted: Sat Dec 28, 2019 6:54 pm    Post subject: Re: Farmall A cylinder head Reply to specific post Reply with quote

I have done those engines with and without adding a waterpump so I would e your choice. Adding water pumps will make them run a lot cooler when ideal temp is around 175 or so
 
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teddy52food
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PostPosted: Sun Dec 29, 2019 7:52 am    Post subject: Re: Farmall A cylinder head Reply to specific post Reply with quote

Just make sure you use the head gasket for without a water pump.
 
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Ken Hansen
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PostPosted: Sun Dec 29, 2019 3:19 pm    Post subject: Re: Farmall A cylinder head Reply to specific post Reply with quote


My only thoughts on this would be the application of finished tractor.

Point being if only used for hauling around a wagon for giving hay rides in fall would be totally different from pulling a three bottom plow on a 500 acre farm on a 90F day.

Might be a bit of an exaggeration but I'm just saying if you are only using the "extra HP" for a short sprint up a hill it is a big difference from running it at the max HP for 8 hours straight!
 
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corvairman
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PostPosted: Thu Jan 16, 2020 6:55 pm    Post subject: Re: Farmall A cylinder head Reply to specific post Reply with quote

Thanks for the info, I ordered a water pump.
 
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