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JD B all fuel head.


 
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4020 electrician
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PostPosted: Sun Sep 16, 2018 5:54 am    Post subject: JD B all fuel head. Reply to specific post Reply with quote

I?m trying to get to 8:1 compression on my B. I?m running M&W pistons. How much can I safely mill the head and not have to do a lot of other modifications? Thanks
 
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36 A
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PostPosted: Sun Sep 16, 2018 5:45 pm    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote

What year B are we talking ?
 
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PostPosted: Mon Sep 17, 2018 8:24 am    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote

Early 47.
 
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36 A
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PostPosted: Thu Sep 20, 2018 4:10 am    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote

Why not run a gas head from a later tractor ? If there like an A you can't shave a all fuel had enough to be as good as a gas head . Gas head and gas manifold should bolt on and might flow better . Ya might have to work on the flange of the exhaust pipe .
 
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BushogPapa
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PostPosted: Mon Oct 08, 2018 5:50 am    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote


Have the Connecting Rods lengthened...
 
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BushogPapa
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PostPosted: Wed Oct 10, 2018 5:12 pm    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote


While it is apart....put a GOOD, re-ground or aftermarket Cam, so it can actually Breath...well worth the time and $$...

The original valve timing SUCKS..( NO Overlap)..
 
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gtx1967jewison
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PostPosted: Thu Nov 01, 2018 6:35 am    Post subject: Re: JD B all fuel head. Reply to specific post Reply with quote

ALL B heads are the SAME chamber volume & shape from 41-52. Gas or All fuel are the SAME. You CAN use a flat head off a 39-40, you have to oversize the head stud holes slightly because they don't quite line up. works good. Water outlet on bottom may be different too i can't remember. Or you can find a Heisler head but they're hard to find & around $1000 for a core. If you mill the stock head you don't gain enough compression to even measure on a gauge & it weakens the head which already has enough problems holding a gasket- horrible idea.
 
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