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Tractor Pulling Discussion Forum

400 Farmall Cylinder head

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Author  [Modern View]

08-29-2014 10:46:27

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I have a stock 400 farmall just want to be competitive in local tractor pulls it has a stock bottom end just had the t/a replaced still running out of power in 7000 lb class and up. Wanting to do some cheaper upgrades up to ideas?
Thanks For the help

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09-11-2014 04:21:15

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 Re: 400 Farmall Cylinder head in reply to dpowell112, 08-29-2014 10:46:27  
Until you have your other problems solved forget the LP head. In first gear with the torque engaged you should be going in the low 2 mph range. You need to get it on a dyno. Then there is your configuration. That engine could be such a wide variety of things. It could still have 4" flat tops with the 8060 head or if it is a later 400 it could have 4.125" dome pistons with a the same head they used on the C-281. Your cam may be wore down and that would hurt you as well. Your governor may be wore out. We have few 400/450 tractors we have in the family and they run from 52 hp to 67 hp on the dyno. If you want help contact me. I enjoy helping people with stock tractors.

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08-30-2014 13:58:22

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 Re: 400 Farmall Cylinder head in reply to dpowell112, 08-29-2014 10:46:27  
the 10 + hp you'll get from an 1100 dollar propane head maybe the cheapest hp you get . go to ebay and get one run 96 octane and a 29 venturi . you may have to open the jet some but it's the easiest hp you'll get

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08-29-2014 17:07:31

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 Re: 400 Farmall Cylinder head in reply to dpowell112, 08-29-2014 10:46:27  
Cheapest upgrade is to pull it below 7000lbs.

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