Technical Dixon Cylinder Heads

What do we know about these heads?

 

It's odd that they ran them at Muroc it 1938-39 but the spec sheet says they use valvetrain components from a SBC that didn't come out until 1955.

 

I'm guessing from the specs, they are re-pops. Look like they're nicely done, but I was hoping to see some pics of the combustion chambers & ports. Both orig & the re-pop version. & I'd also guess it'll take the equal weight of them, in $100.00 bills, to acquire them. .
Marcus...

 

From 2004:

DIXON F-HEADS FOR THE FORD FLATHEAD... REPRODUCED!

http://www.jalopyjournal.com/forum/threads/dixon-f-heads-for-the-ford-flathead-reproduced.11028/

 

Gary's farther originally built and ran them at Muroc. He made new patterns to take more modern off the shelf parts. Hes had them at LARS and I think he gets $6500 for them ready to bolt on.

 

Guess I should've done a search first Demote me all the way back down to FNG.

 

I found an old flyer on these the other day and they were one of this mornings conversations at breakfast with a couple of friends. What a coincidence. Does anybody here have any more detailed pics showing a set bolted on with the valve covers off ? How about experience with street driving ?

 

Here's a couple pics from a thread with more "F" head info:

http://www.jalopyjournal.com/forum/threads/f-head-flathead-conversions-photos.732281/

 

$6500 seems reasonable
tk

 

If I am looking at these pics right , the pushrods would somehow function off of and the headgasket would seal around the original exhaust valve? They also would not work on a block that has been relieved ?

 

Fantastic looking set of heads. Uncle Buck could be right about the fitment on a block that has been relieved. Any additional information on these heads would be greatly appreciated.

 

Here's a little more info. From - NZ Hot Rod 2006

 

Here's a video...

 

Thanks for posting the additional information on the Dixon heads flthd31. The pictures along with the tech article and the video gives a tremendous amount of information on these heads. flthd31 would this be your flathead engine in the video?

 

Dream engine

 

Thanks for the pics of the cc & rockers.
Marcus...

 

Superb!

 

How much power will they support? Seems like a lot of $$$$ for 150HP, but I get the unique application point a bit, maybe, not sure. Can you build 150HP with standard flathead parts (common aftermarket stuff)? Is the look worth the cost? How durable have they proven to be after 10yrs?

 

Some Dixon Photos for your review. I went to visit Gary Richards the other day and to my surprise he's up to making a new pattern for the full overhead Dixon head. Evidently Dixon manufactured three types of conversions over the years for the beloved flathead including the F-head and the full overhead. He's still in the pattern phase but his work is impeccable. The engine and photos are courtesy of Greg Buller.

Geoffrey

 

I believe that these may be Dixon full overhead heads??
Dixon heads, full overhead??

 

Karl, Didn't mean full overhead as in cam, just intake and exhaust valves. Sorry for any confusion. Great photos!

 

Moonlight Graham, those are OHV heads not OHC.

Karl, at a guest I would say they are Dixon. They don't look like ***mings, Tornado or Birner OHV heads.

 

Very interesting. I have been wanting a F-head for years. Any pics of Gary Richards combustion chambers? Are they done from the original patterns? Anyone running F-heads? I guess the old exhaust valve area needs to be plugged and machined to get a sealing surface. I'm very interested, keep posting to this thread please.

Thanks,
Magnus

 

WOW so interesting thanks for posting guys
always amazes me how much of this engineering was done back in the day
and little of this is done now days even with the technology we have now
just imagine working out the water p***ages

 

FNG would like to know what a "relieved block" is (Tried to find it on the net first). Thanks in advance

 

A wide groove usually about 1/8" deep cut from the valves to the cylinder on a flathead. Supposed to improve flow of the fuel mixture as the piston goes down, but also reduces compression. Of course there have been many different styles and sizes over the years.

 

So, the full overhead Dixon uses an adapter to route the intake ports from a stock pattern manifold into the new heads? Kinda like a mid-manifold?

 

Alchemy, Definitely an adapter to go between the intake and OHV heads. Not sure if a valley cover is required but I think it might be. Perhaps casting a OHV specific flathead intake would be a good idea.

Geoffrey

 

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