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Super sonic heads |
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Schimms15 
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Joined: 17 Jan. 2011 Location: milwaukee, Wisc Status: Offline Points: 2953 |
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 Topic: Super sonic headsPosted: 02 Feb. 2013 at 11:31pm |
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Did they make a super sonic for the f head? Also wouldn't you get more hp by just taking your original head and grinding out some more material. ( I forget what the actual technical term is)
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46 2a
51 truck project named Karen |
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F Bill
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Posted: 02 Feb. 2013 at 11:33pm |
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Milling it down (Also known as shaving the head).. I don't think there was a Supersonic F head.
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garage gnome
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Posted: 03 Feb. 2013 at 12:42am |
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Nope, the Fheads have no modifications like that. Only way to increase the CR is by decking the head like Bill said.
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Nate
1953 3A, 1949 3A, 1947 2A, 1918 IHC Titan 10-20, 1905 IHC Famous, other hit n misses |
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Lee MN
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Joined: 13 Aug. 2008 Location: Harris, MN Status: Offline Points: 4953 |
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Posted: 03 Feb. 2013 at 1:18am |
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The Supersonic engine was a L-head jeep engine used in Kaiser Henry J cars, one of the first econo box cars. The combustion area or squish area is different than a standard Jeep head so simply machineing down a standard head will make a difference but will not be the same, other Supersonic differences are the vacume advance dist and a Yf Carter carb on a different intake manifold, I believe the intake was also used on 4 cyl Jeepsers and DJ Jeeps. Thay did make a Hi compression head for the F head engine I do not know what the differences are.
HTH, Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Schimms15
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Joined: 17 Jan. 2011 Location: milwaukee, Wisc Status: Offline Points: 2953 |
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Posted: 03 Feb. 2013 at 1:22am |
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So if your jeep goes super sonic its just the head but
It could also be a new carb and manifold? |
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46 2a
51 truck project named Karen |
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F Bill
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Posted: 03 Feb. 2013 at 1:35am |
Lee are you sure about the squish area? I have both heads here and can see no difference in them other than the part of the squish that would be removed by the decking process...Perhaps I need to make a mold and see if there is any discernable difference. Now I have to make sure I have the right distributor too when I make my DJ fly...
 Already have the carb and manifold......Edited by F Bill - 03 Feb. 2013 at 1:45am |
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Lee MN
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Posted: 03 Feb. 2013 at 1:40am |
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I guess going Supersonic in 2A terms is just the head, I am working on going totally Supersonic with all the goodies, all I need is the carb linkage and I will have all the parts. This spring I plan on running the Jeep several passes of 1/2 mile and timing them, then switching the parts to total Supersonic and running the same 1/2 mile, I will post the process and the results. I would do it now but it's 5 degrees outside and the road is covered with salt, LOL
Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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F Bill
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Posted: 03 Feb. 2013 at 1:43am |
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Lee do you need pictures or dimensions from any of my DJ stuff? I don't think I have any extra pieces but I don't think it would be hard to copy.
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Lee MN
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Posted: 03 Feb. 2013 at 1:48am |
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F Bill, last I looked I thought the squish area looked smaller on the Kaiser head, I will look again (I have new glasses now), You are most likely correct. Do you have any extra linkage?
Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Lee MN
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Posted: 03 Feb. 2013 at 1:52am |
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I think the pivot on the tappet cover is the same as an F head, I do have the parts located but if that does not work out I will get the dimensions from you
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Lee MN
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Posted: 03 Feb. 2013 at 1:53am |
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I have spare dist if you need one.
Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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F Bill
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Posted: 03 Feb. 2013 at 2:03am |
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Lee check out my post, going Supersonic, Texas version for pictures of the combustion areas....The squish area IS smaller on SS heads but if you look closely it is the same shape as the 2A chamber MINUS the shelf area that would be removed in decking..At least to my eyes.
(Sorry , I don't have any extra linkage right now...and I dunno what I have in stock for distributors either, but I will keep your offer in mind..)
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If you haven't checked out the tech FAQ section, go to:
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porsskar
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Posted: 03 Feb. 2013 at 8:58am |
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Before installing my Supersonic head I also did the measurements with a syringe both on the standard and the Ss head.
(The volumes above piston and around valves was smaller than I hade aticipated and did not influence the calculation very much.) Conclusion was that the compression ratios mentioned in literature and on this forum are correct. I still think the interesting issue is that at least in my case ther was a noticeable addition of hp and in fact nothing negative. E.g idling etc is as nice and calm with the Ss as with the standard head. |
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Sten from Finland
1947 CJ2A serial 94118 1949 8NAN Ford tractor 1965 Mahoghany Snipe FIN 14018 |
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all4jpn
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Posted: 03 Feb. 2013 at 12:36pm |
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there is a high altitude f-head cylinder head with a different compression ratio
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46 cj/06 lj/ and mb/2a/38 hybrid project
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Lee (MN) wrote: